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Has anyone used a hand-cranked charger? I have a Brookstone hand-cranked flashlight/radio that can charge phones. I'm considering getting an adapter to charge my Tilt but I don't know if it can handle it. It says it can output up to 600mA. I've heard bad reports of other chargers with dumb phones but nothing of this one. It seems unlikely this can keep a power-hungry Kaiser charged. It also outputs 6 volts. I hope this doesn't fry the phone.
Edit: I meant 600mA
Any estimates on how long it would take to reach full battery charge?
A couple of hours?
Excellent for weight loss, especially if you use 3G...
The standard Kaiser or Hermes wall charger is rated at 1A (1000mA), and a powered USB port outputs 500mA. As some people have problems charging from USB - particularly after completely discharging their batteries, then I'd think that 500mA is the minimum power required to charge.
If you install one of those programs which displays battery power you'll probably find that the power draw is much higher than 6mA (even in standby) so all you'll do with the hand cranked charger is slightly reduce the rate at which the battery is discharging.
Looking at a 1350mAh battery, this would take a minimum of 9 days and 8 hours to charge the battery from flat if it isn't being used - great workout but hardly worth it
I got a cheapo one from some gareg... AA branded thing for a fiver, flash light thingy to... five mins of winding gave a one percent increase in battery, but then if your really stuck it could be a good thing... only cost a fiver too!
I have the ambition to build a home made external battery pack for my HD2 . I'm not a electrical engineer, my knowledge on this is very basic. But, if I start to think, wouldn't it be just as easy as mounting 3 or 4 AA batteries in series, because USB is 5V? But then is the is the amperage enough?
Please give me some thoughts!
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
http://www.boxwave.com/products/batteryadapter/index.htm
I have the first one, but modded it so that the USB port is directly attached to the case (like the second one).
Haven't failed me yet; however it won't charge an iPod due to its unique USB circuitry
Yup, 4 AA rechargeable batteries would do it, I wouldn't try alkaline ones as that would give a good 6V.
Alright thanks after all. I think I'm not going to make it myself, because taking the risk of blowing my HD2 is one step too far now .
the biggest problem with external packs vs AC adaptor is that
1) most AA battery packs outputs to HD2 @ around 100ma reason being the voltage is too low.
2) i have tried that sanyo 5000ma USB battery pack which does around 400ma, it charges faster but it's actual power output is around 4v
the key is the higher the voltage, the faster it charges.
I have seen most 4AA battery packs are conected as 2x serial, 2x parrallel, which means if you are using 2500mah batteries, it's only [email protected]
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
this device is connected as such as i have it also.
I tried using sanyo eneloops, hd2 recharges @ 140ma
i tried 2800mah powerex, HD2 charges @ 110ma
i tried diposalble lithium, hd2 charges @ 350ma (measured at 3.3v )
4AA all connected in serial would be the most ideal. but it only stores very little power. 1.3v x4=5.2v but if your battery is 2500mah, then it's only [email protected]
the higher the voltage the faster it charges.
I am actually thinking of building a 8AA battery, to make it a [email protected] but 8AA batts aint light. but am sure it will charge the phone as fast as AC adaptor.
AC adaptor does around 5v -/+ 0.3v 850ma
I am thinking out making my own battery pack also. one that does 5.2v @ 2000ma so that it can charge the battery as fast as AC adaptor.
but the problem is li-ion chemistry dont really allow high discharge unless it's A123 batteries.
2nd is that nimh batts are capable of high discharge but they dont really store alot of power in terms of weight to power ratio.
nimh states 1.2v but is 1.3v at full charged. highest i have seen from my batts are 1.35v
li-ion states it's 3.7v but at full charge it's 4.1v, highest i have seen from my batts are 4.25v
the key is building a circuitry that ups the voltage to 5v and acts as a voltage stabilizer aka mosfet and capacitor. but P=IV and considering the power loss from voltage conversion.
sigh.... why cant anyone build a extended battery the size of iphone's external battery slot-in. i dont mind if the phone is thicker. but rather than a hump in the middle of the phone, they can always make the battery the size of the phone. kind of like battery+case type.
the thing about battery ratings are,
eg, rechargeable batteries states 1.2v, that is actually the MINIMAL voltage.
same goes for akaline. 1.5v @ minimal.
li-ion 3.7v MINIMAL.
lithium 1.6V minimal , i have one batt at measures as high as 1.77v !
all devices have a wide range input. for reasons
1) AC adaptor rates @ 5v but it need tolerance cuz it fluctrates from 4.6-5.4v
2) batteries start high, ends low, but voltage curve is very stable.
There are more than enough commercial, regulated packs either for AA batteries or with integrated li-ion batteries, for many budgets, to lose time making one yourself IMO.
Thanks for your story .
Please keep me posted if you are going to try for yourself!
purezerg said:
the biggest problem with external packs vs AC adaptor is that
1) most AA battery packs outputs to HD2 @ around 100ma reason being the voltage is too low.
2) i have tried that sanyo 5000ma USB battery pack which does around 400ma, it charges faster but it's actual power output is around 4v
the key is the higher the voltage, the faster it charges.
I have seen most 4AA battery packs are conected as 2x serial, 2x parrallel, which means if you are using 2500mah batteries, it's only [email protected]
http://www.boxwave.com/products/batteryadapter/batteryadapterforminisync.htm
this device is connected as such as i have it also.
I tried using sanyo eneloops, hd2 recharges @ 140ma
i tried 2800mah powerex, HD2 charges @ 110ma
i tried diposalble lithium, hd2 charges @ 350ma (measured at 3.3v )
4AA all connected in serial would be the most ideal. but it only stores very little power. 1.3v x4=5.2v but if your battery is 2500mah, then it's only [email protected]
the higher the voltage the faster it charges.
I am actually thinking of building a 8AA battery, to make it a [email protected] but 8AA batts aint light. but am sure it will charge the phone as fast as AC adaptor.
AC adaptor does around 5v -/+ 0.3v 850ma
I am thinking out making my own battery pack also. one that does 5.2v @ 2000ma so that it can charge the battery as fast as AC adaptor.
but the problem is li-ion chemistry dont really allow high discharge unless it's A123 batteries.
2nd is that nimh batts are capable of high discharge but they dont really store alot of power in terms of weight to power ratio.
nimh states 1.2v but is 1.3v at full charged. highest i have seen from my batts are 1.35v
li-ion states it's 3.7v but at full charge it's 4.1v, highest i have seen from my batts are 4.25v
the key is building a circuitry that ups the voltage to 5v and acts as a voltage stabilizer aka mosfet and capacitor. but P=IV and considering the power loss from voltage conversion.
sigh.... why cant anyone build a extended battery the size of iphone's external battery slot-in. i dont mind if the phone is thicker. but rather than a hump in the middle of the phone, they can always make the battery the size of the phone. kind of like battery+case type.
the thing about battery ratings are,
eg, rechargeable batteries states 1.2v, that is actually the MINIMAL voltage.
same goes for akaline. 1.5v @ minimal.
li-ion 3.7v MINIMAL.
lithium 1.6V minimal , i have one batt at measures as high as 1.77v !
all devices have a wide range input. for reasons
1) AC adaptor rates @ 5v but it need tolerance cuz it fluctrates from 4.6-5.4v
2) batteries start high, ends low, but voltage curve is very stable.
Click to expand...
Click to collapse
It's not only a matter of saving time, it's just nice to make your own. It gives pleasure . And some excitement for the risk of blowing an expensive phone .
kilrah said:
There are more than enough commercial, regulated packs either for AA batteries or with integrated li-ion batteries, for many budgets, to lose time making one yourself IMO.
Click to expand...
Click to collapse
GeitjeG said:
It's not only a matter of saving time, it's just nice to make your own. It gives pleasure . And some excitement for the risk of blowing an expensive phone .
Click to expand...
Click to collapse
If youre into making it yourself,
there's this site:
http://www.ladyada.net/make/mintyboost/
there are detailed instructions and design schematics
+ the parts list.
It would be more complex than using a simple 4 AA battery case connected to a usb plug, but considering that without a voltage regulator wou would be limited to rechargable batteries (since 4 regular AAs would give too high voltage), and considering saving the weight and size of 2 more AAs . . .
Anyway -
give it a look.
(PS - I found this site some time ago, I do not own it, and do not have any connection to it)
Som30ne said:
If youre into making it yourself,
there's this site:
http://www.ladyada.net/make/mintyboost/
there are detailed instructions and design schematics
+ the parts list.
It would be more complex than using a simple 4 AA battery case connected to a usb plug, but considering that without a voltage regulator wou would be limited to rechargable batteries (since 4 regular AAs would give too high voltage), and considering saving the weight and size of 2 more AAs . . .
Anyway -
give it a look.
(PS - I found this site some time ago, I do not own it, and do not have any connection to it)
Click to expand...
Click to collapse
I'm using 4NiMh rechargeables giving 2800mAh in a clear AA case with USB soldered onto the case terminals with a flying lead and its fine.
"Turns out some devices don't like being charged with a battery pack, usually devices that require special drivers to charge. "
I just cross checked with my electrical enginner friend
he said that different devices hvae different tolerance.
eg, some devices only accept 4.95-5.05v
there is a circuit in all USB devices to stablise the voltage. to suppress/reduce if it's too high, but nothing if it's too low.
purezerg said:
"Turns out some devices don't like being charged with a battery pack, usually devices that require special drivers to charge. "
I just cross checked with my electrical enginner friend
he said that different devices hvae different tolerance.
eg, some devices only accept 4.95-5.05v
there is a circuit in all USB devices to stablise the voltage. to suppress/reduce if it's too high, but nothing if it's too low.
Click to expand...
Click to collapse
I heard no such thing.
I did see a courious behaviour in some devices,
that needed some voltage on one of the data pins as well in order to start charging.
Connecting these devices to a power supply that fed the power wires only, and didnt put anything on any of the data wires did not charge the devices.
hi mates
why dont you just use 10 recharg.batteries and the circuitry of the original HTC HD2 car charger ? it works like butter&honey for me : )
Right guys, thanks for the input.
After I think it's not worth the risk to build a pack completely myself.
The 3 best options that sound easy and safe to me are:
- Using the car charger circuitry with 10 eek rechargable battteries.
- Buying a cheap one on internet
- Building one using a tried tutorial
GeitjeG said:
Right guys, thanks for the input.
After I think it's not worth the risk to build a pack completely myself.
The 3 best options that sound easy and safe to me are:
- Using the car charger circuitry with 10 eek rechargable battteries.
- Buying a cheap one on internet
- Building one using a tried tutorial
Click to expand...
Click to collapse
Choice #1 is obivously undesirable.
Choice #2: Internet ones usually don't have voltage and current protection. For example, the boxwave one I linked to is just a simple charge circuit with no built-in resistors and such.
Choice #3: I would suggest using Mintyboost: http://www.instructables.com/id/MintyBoost!---Small-battery-powered-USB-charger/
purezerg said:
...4AA all connected in serial would be the most ideal. but it only stores very little power. 1.3v x4=5.2v but if your battery is 2500mah, then it's only [email protected]
the higher the voltage the faster it charges. ....
Click to expand...
Click to collapse
AFAIK, the charging speed of the device is a function of current, not voltage. A source that outputs at a maximum of 500mA will charge a device twice as slow as a source that outputs at a maximum of 1A, if it is assumed that the device can take in charge at a current of 1A
This tutorial looks really nice and seems well thought out...!
...
felixdd said:
Choice #3: I would suggest using Mintyboost: http://www.instructables.com/id/MintyBoost!---Small-battery-powered-USB-charger/
Click to expand...
Click to collapse
...
http://www.energizerpowerpacks.com/us/products/xp1000/
it says this is ithium polymer battery cell. does it matter to charge this with our lithium ion battery legend????
not sure about energizer but i'm using Sanyo Eneloop,
eneloop.com.sg/products/products/mobile-booster/kbce1ssp.html
just for emergency when on the move and no way to charge the phone.
tried once charging the phone when it just left 4% battery charge. the eneloop able to charge the phone (the phone led and notification indicates charging), n charge the phone up to 20% before the eneloop drains. the one i have is 5VDC 500mA output.
Here's some higher capacity / less expensive alternatives to the energizer:
5000mah w/ dual USB:
http://mobile.brando.com/usb-power-station-ii-5-000mah-_p05376c0843d003.html
2500mah w/ single USB and dual solar panels:
http://mobile.brando.com/universal-solar-charger_p02152c0843d003.html
They have some nice docking stations w/ 2nd battery chargers too. Seems like there's quite a few good deals.
Found an even better one since my last post:
http://www.dealextreme.com/details.dx/sku.40210#open full view
rewen said:
Found an even better one since my last post:
http://www.dealextreme.com/details.dx/sku.40210#open full view
Click to expand...
Click to collapse
It doesn't say, but it would be nice if it's Lithium-Ion. Most solar batteries are NiMH and those aren't as good. Either way though, that's a great price.
Just got a griffin powerjolt micro, comes with an ipod cable so you'll have to use your own, but it charges the streak up a treat
Think it was 12 pounds from amazon.
It's designed for iPads, which need 2 amps, it's rated for 2.1 amps. Charged from 30 to 60% in 20 mins while using gps.
Hope that's useful .
Sent from my Dell Streak using XDA App
For battery life is better to charge with low amps and for a long time. I would prefer ,not to use a charger with more than 1A
i got myself te belkin 1A charger. Should work good I guess.
As mentioned in the other thread, both these two work just fine :
https://www.dealextreme.com/p/car-p...cable-charger-set-for-apple-ipad-12-24v-45227
https://www.dealextreme.com/p/car-cigarette-powered-1000ma-usb-adapter-charger-black-dc-12v-40470
$6 or $2 including free shipping worldwide. You'll need the Streak's USB cable to connect it.
Anbuch said:
For battery life is better to charge with low amps and for a long time. I would prefer ,not to use a charger with more than 1A
Click to expand...
Click to collapse
The car charger does not force power into the phone, the phone draws what it needs. Using a power supply with a higher Amp rating means less strain on the charger not more power than is needed going into the phone.
Sorry for my bad English, I guess you do not understand what I mean.
You're right that the car charger with more amps does not force more power into the phone (I do not say that),but if you use a charger with more amps , charging time is less. The battery prefers long time charging with less charging amps. In fact using less charging amps ,the battery allowed to load more power (a little bit ). You can try it by using a USB port of yours computer to charge the battery.
Anbuch said:
Sorry for my bad English, I guess you do not understand what I mean.
You're right that the car charger with more amps does not force more power into the phone (I do not say that),but if you use a charger with more amps , charging time is less. The battery prefers long time charging with less charging amps. In fact using less charging amps ,the battery allowed to load more power (a little bit ). You can try it by using a USB port of yours computer to charge the battery.
Click to expand...
Click to collapse
Maybe it's just me, but what you are saying is exactly the same thing.
If the charger isn't forcing more power into the phone, then the charging time will not change. If the battery is receiving less current then what it was designed, such as a low powered USB port, then it would take longer then normal to fully charge. But once the charger puts out the amount of current that the battery will normally draw, the battery will only charge at that rate. Increasing the current beyond that amount will not speed up the charging time or push more current to the battery.
brianlp said:
If the battery is receiving less current then what it was designed, such as a low powered USB port, then it would take longer then normal to fully charge. But once the charger puts out the amount of current that the battery will normally draw, the battery will only charge at that rate. Increasing the current beyond that amount will not speed up the charging time or push more current to the battery.
Click to expand...
Click to collapse
Anbuch is trying to say that the battery will last longer in the first scenario - the longer, slower charge from the low powered USB port.
Quicker battery charging does degrade the cells in less time - if you were to always use a 500mA charger, you would get more life from the battery than if you were to always use the stock 1000mA charger.
You can pick up a replacement battery from eBay for $10, so none of this really matters - when your battery wears out in 18 months, just buy a new one.
Nomgle ,thanks, this is exactly what I wanted to say!
I just gave an example with a USB port. In fact a USB port and a stock 1000mA charger are save enough for the battery of a Streak (1530mA). I just wanted to say : Do not use 2100 mA charger
Flinx78 said:
.... it's rated for 2.1 amps. Charged from 30 to 60% in 20 mins while using gps....
Click to expand...
Click to collapse
This will "kill" the battery very soon
Some battery reading:
Understanding lithium-ion
Charging lithium-ion batteries
How to prolong lithium-based batteries
From the last page linked:
[FONT=Arial, Helvetica, sans-serif]Generally speaking, batteries live longer if treated in a gentle manner. High charge voltages, excessive charge rate and extreme load conditions will have a negative effect and shorten the battery life. This also applies to high current rate lithium-ion batteries.
Not only is it better to charge lithium-ion battery at a slower charge rate, high discharge rates also contribute the extra wear and tear.[/FONT]
Click to expand...
Click to collapse
.
I use a black&decker converter and it has a usb port already built into it and that works pretty good for me.
Sent from the phone killer of ALL phone's, Dell Streak!
this has been real hell finding information about whether this http://www.ebay.com/itm/Powerocks-p...y_Chargers&hash=item3cc55ca8b0#ht_4645wt_1163 is compatible with my Motorola defy+ (note custom roms, Switching from time to time, Currently on WIUI ICS) and other information such as how long does it last and etc.
has anybody used this?
is it worth the money and how does it translate to battery % on my defy+.
any other feedback?
and maybe other recommendations (with that price region)
and is there a thing like this that uses AA batteries, if so, how many will it take to charge my Defy+
thanks ahead
EDIT:
what's the proper name for that thingy? because this thing has wayyyy too many names,
power bank, external battery, portable charger, portable battery, extra battery. and many many many more!!! this is why it's complete hell finding information.
what's the real and most proper name for it?
Just a single word 'AVOID'
i don't usually like to be disrespectful, but.
you sir, have convinced me with your long list of arguments and good points of reason to support your advice.
could you please explain, why?
Ok. Here it goes.
I have used these chargers long back, I think around a year back. It barely charges 15% of your mobile battery (I was using a Samsung Galaxy Apollo at that time which had a 1500mah battery) with a single AA cell which I think is totally not worth.
I hope this is enough for you to get a fair idea
so, you're saying that the Portable chargers that use AA batteries are bad, or are you saying all these portable chargers are bad and charge too little?
if you're saying that all the portable chargers are bad and charge too little, then i would have to say that it depends on how much mAh the charger can hold.
say i get the 2600 mAh charger to charge my Defy+ (think around 1700 mAh) when it's completely out, i think that i will charge fully at least once (say around 1000 mAh at MOST! is lost because of the charging procedure)
i'm only talking about the AA battery based chargers. I don't have any idea about other powerpacks as I've never used it.
1 AA battery for 225 mAh!?!?!?!? that's awesome!!! would be great for camping trips, you get like 12 AA batteries (or more, depends on how long you plan to be away from charging your phone normally) and you can even play in the evening or even watch porn if you got Data signal!
i'm still probably going for the normal one, and maybe i'll get an extra charger that uses AA batteries in-case i go camping somewhere.
can people please give feedback on whether it's good enough? why are there only 2 posters?
I think that it works just seen a duracell one in a store near me wich holds 4 AA batts, i think on buying it and fillit with some 4 NiMh AA acumulators rated at 2700 mAh each, just think about it thats 10800 mAh in a portable charge, that will charge my Defy battery at least 5 times even with an extra burning that the charge does.
Sent from DefyX RED.
kHron0S said:
I think that it works just seen a duracell one in a store near me wich holds 4 AA batts, i think on buying it and fillit with some 4 NiMh AA acumulators rated at 2700 mAh each, just think about it thats 10800 mAh in a portable charge, that will charge my Defy battery at least 5 times even with an extra burning that the charge does.
Sent from DefyX RED.
Click to expand...
Click to collapse
isn't there a case of voltage involved? (idk, i'm a complete noob in this)
and i need something smaller, something as small as the charger i posted.
i'm just curios to know if it works or not and any other feedback about it.
Bump
bump
Confidential said:
bump
Click to expand...
Click to collapse
lol
NiMHs are 1,2V which means, 2700mAh hold 2700mAh * 1,2V= 3,24 Wh which is the same as 11,664 kJ
The Defy battery holds 1500mah at 3,7V --> 5,5 Wh = 19,98 kJ
Taking efficiency in count you might be able to load your Defy with two fully charged NiMHs once, but i`d rather expect that two are not enough.
As for the that eBay-offer: The voltage is given as 5,1V. With 2600mAh that would mean 13,2 Wh. But i rather believe they are stating the capacity at 3,7V for marketing reasons. That would mean 9,62 Wh. That would allow you to recharge about one and a half time.
bump?
So someones after advice on portable power when away from the mains?
Ive been using a New trent imp1000 to keep things going, its a li-ion rechargable powerpack with a capacity of 11000mah and it keeps my Defy going for 4 days.
I also have a total of three batterys for my defy, and a universal li-ion external charger, called a cam caddy, although its designed to charge camera batterys from a 5 volt supply it also quite happily charges up the battery for my defy as well.
So for extreme use i can have a battery in use in my phon, plus a spare with me, and back at base ( or just overnight) a battery on charge in the cam caddy.
If im in an area with access to mains i will take the imp1000 and its charger to top up where and when i can.
I also have a universal USB charger with swapable plugs that fit all major power outlets worldwide.
And to top it all off a USB AA battery charger that will ( slowly) charge up 4 AA batterys form a solar panel, or from a USB input ( faster) , or output 5V through the USB out put port.
This little set up has kept me going for 14 days with no access to mains power ( except for a few bits here and there - 20 minutes at a bus station/railway station and so on) , keeping my phone going (defy) a high powered AA cree LED torch, a camera ( via spare battery+cam caaddy) and an mp3 player. the trick is careful battery management - on the defy turn off everything when not in use, except the ability to receive calls and number your batterys for ID, and the same for cameras etc etc.
2Pints said:
bump?
So someones after advice on portable power when away from the mains?
Ive been using a New trent imp1000 to keep things going, its a li-ion rechargable powerpack with a capacity of 11000mah and it keeps my Defy going for 4 days.
I also have a total of three batterys for my defy, and a universal li-ion external charger, called a cam caddy, although its designed to charge camera batterys from a 5 volt supply it also quite happily charges up the battery for my defy as well.
So for extreme use i can have a battery in use in my phon, plus a spare with me, and back at base ( or just overnight) a battery on charge in the cam caddy.
If im in an area with access to mains i will take the imp1000 and its charger to top up where and when i can.
I also have a universal USB charger with swapable plugs that fit all major power outlets worldwide.
And to top it all off a USB AA battery charger that will ( slowly) charge up 4 AA batterys form a solar panel, or from a USB input ( faster) , or output 5V through the USB out put port.
This little set up has kept me going for 14 days with no access to mains power ( except for a few bits here and there - 20 minutes at a bus station/railway station and so on) , keeping my phone going (defy) a high powered AA cree LED torch, a camera ( via spare battery+cam caaddy) and an mp3 player. the trick is careful battery management - on the defy turn off everything when not in use, except the ability to receive calls and number your batterys for ID, and the same for cameras etc etc.
Click to expand...
Click to collapse
i think 11000 mAh is a little too much for me, it may be good for camping trips and etc, but i don't think i'm gonna buy something that (probably) big and (probably) expensive. most of the use of the external charger will be when i'm out with friends for a long time, or say after school i spontaneously decide to go out with friends before getting home (unfortunately a 1 hour drive from friends city to mine) so i need an a portable charger so i won't get bored on the way back, my battery lasts a school day, if i go somewhere that is not home after school, it won't last.
about the extra batteries, are those original from motorola? if not, are they as good as the original? are they worth getting?
The batterys are official motorla ones, as i b ought a cheap un official one and that had issues ( wouldnt show the charge level on the defy )
The battery pack is a "new trent imp1000" which costs £30 from amazon.
I also have a dock for the defy in which my phone usualy sits, at the back of this dock is a slot for an extra battery, left overnight this will charge both my Defy ( with battery inside) and the extra battery in the slot, this is plugged into a dektop pc where some of the USB sockets are still powered up ( giving out 5v) even when the desktpop p.c is off
supdealer offers nice portable power bank
as portable external battery/power bank/portable charger, An ebay seller called supdealer sells a nice one. You can have a look.
It may help you. :laugh:
I have that new Trent battery, its perfect almost same size as defy.
Sent from my GT-P3113 using Tapatalk
Guys,
If you really want true power on the go, buy a YOOBAO power pack, the 11200 mAh one.
It is really a beast and is really charging a defy several times before going empty.
http://www.ebay.com/itm/New-Yoobao-...?pt=US_Tablet_Accessories&hash=item3377c5ccd4
One thing to the initial question...
Confidential said:
this has been real hell finding information about whether this http://www.ebay.com/itm/Powerocks-p...y_Chargers&hash=item3cc55ca8b0#ht_4645wt_1163 is compatible with my Motorola defy+
Click to expand...
Click to collapse
Yes, all iPhone compatible USB-Chargers are compatible to our Defy and other new mobiles.
Why? EN_62684: Common External Power Supply (EPS)
Why would I use Li-ion instead of AA Cells (NiCd,NiMH or NiZn)?
Higher Energy Density!
Another benefit of Li-ion is the discharging charakteristika (sorry for german captions).