Database Develop

Alternate Emergency Power for HD2

Just Mobile PP-08 Gum Pro 4400mAh Power Pack
I purchased the power pack from eBuyer for roughly £35(inc. pp) and received it 2 days ago, and managed to get 2 full charges and an extra 44% battery life for the HD2.
The 2nd full charge I left the HD2 on and surfed the internet and played a 8 min video on youtube.
The pack itself takes about 3 hours to charge using a mini usb lead however I did not use the laptop/computer to charge the unit. I had a old blackberry charger hanging around with a mini usb connector and charged it up from the mains. Online reviews do state that the unit takes roughly 3 hours to charge anyway.
I did look at other battery packs (energizer, phillips, kensington, etc etc.) but couldnt find any deals for the same amount of power. Just thought i'd post this little gadget on the forum just incase anyone out there uses the phone / travel a lot.
Let me know if anyone has used this brand/model before and how you got on with it.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Image from eBuyer.

Energizer for me...
I plan to use my old Energizer "Energi-to-go". It worked great on my old Kaiser & Touch Pro. I ordered a new tip ($2.99) from batteries.com last night for the new micro usb port.

How often can you charge your HD2 with this energizer power pack?
(with 2 AA-NiMH 2200 mAh rechargeable batteries)
Is there a way to calculate this when you know the capacity and voltage of the batteries?

Bib_x said:
How often can you charge your HD2 with this energizer power pack?
(with 2 AA-NiMH 2200 mAh rechargeable batteries)
Is there a way to calculate this when you know the capacity and voltage of the batteries?
Click to expand...
Click to collapse
I'd expect you'd get atleast 1 charge (minimum).. Normally rechargable AA are around the 1.2/3v mark and will kick out 2200mAh at the rated voltage for an hour.
Im not really sure what the actual HD2 running voltage is... You'd have a more realistic figure that way.

hd2 battery is 1230 mAh and 3.7 V

Bib_x said:
hd2 battery is 1230 mAh and 3.7 V
Click to expand...
Click to collapse
Yes but, the HD2 doesnt always use 1230mAh 3.7v.. The battery is capable of outputting 1230mA at 3.7v for one Hour straight.

1230 mAh is the capacity of the battery on 3.7 Volt.
If i use 3 rechargable batterys (AA with 2200 mAh) then i have about 2200 mAh at about 3.6 Volt. So i can charge nearly 2 times - is this right?
With only 2 batterys it would be about 1 time and a little bit more.
Is my calculating right?

I bought this on eBay a while back .. £2.99 I beleive. It takes 4 standard AA batteries.
The two mini to micro USB adapters were bought from netimes along with another order.
No idea how much extra charge it gives but with a couple of packs of rechargeable 2700 mAh batteries in my bag and more available in the shops I'm not too fussed.

Bib_x said:
1230 mAh is the capacity of the battery on 3.7 Volt.
If i use 3 rechargable batterys (AA with 2200 mAh) then i have about 2200 mAh at about 3.6 Volt. So i can charge nearly 2 times - is this right?
With only 2 batterys it would be about 1 time and a little bit more.
Is my calculating right?
Click to expand...
Click to collapse
From my understanding yes, if not and someone else can enlighten us.. But theres one problem, you should'nt use a flat battery with a charged up battery, it'll run the charged battery down really fast.
Always use a battery thats charged at the same level.

Tested a few chargers

The Galaxy Note 2 comes with a 2 Amp AC adapter/charger so I was curious to compare the charging capability of the stock charger to other chargers that I already own. I cut open a USB to uUSB cord and used a current meter to see how much 5V current was flowing from the charger into the phone. These results are only good for a Galaxy Note 2. Other phones will draw a different about of current (probably lower). Details of the setup can be found far below.
The conditions were:
Battery level = 48%
Voltage was measured on the cable about four inches from the phone
Only the charger was changed between tests (used the exact same cable/setup for each test).
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The results explain why the Note 2 charges so fast compared to the original Note that I had. Something to keep in mind with dual port chargers...... when I had the two dual port car chargers apart modifying them (the D+ and D- setup so my Note 1 would recognize it as a dedicated charger), I noticed that both chargers used a single 5V regulator and simply ran the power for the two USB ports in parallel. That means that although they say it is a dual 1A charger it could be used as a single 2A charger. I can't say every dual charger is setup that way, but it seems unlikely they would spend the $$ on two different regulator circuits.
Details:
The cable is about three feet long. I cut the cable about four inches from the uUSB connector (where the phone connects). I soldered the ground, data +, and data - wires back together and just left the 5V red wire open so I could insert a current meter (used a Fluke 189 on the 10A mode).
For most people, it is probably best to just buy a car charger that will support 2A for Android. Note that many chargers are setup (their D+ and D- pins) for Apple so you may not get full charging current. That may take a little digging around to see what others have found.

Very interesting! Thanks for posting this as I'd prob would have bought an Iphone car charger. I now know not to, question is what one would be best for matching amperage draw compared to the stock Samsung one(might just order the official, it's cheap).

Thank goodness I bought a lot of those HP touchpad chargers!

I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html
One of you isn't right...

I would love to buy a 2A OEM charger but Samsung hasn't had it on their site for quite some time.

keplenk said:
Thank goodness I bought a lot of those HP touchpad chargers!
Click to expand...
Click to collapse
I cleaned up on those HP Touchpad chargers when they were blowing them out for $5 each. I bought five of them and scattered them all around home and work. Of course the GN2 has such good battery life that I probably won't be needing them much.
mdt73 said:
I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html One of you isn't right...
Click to expand...
Click to collapse
He tested the maximum current you could get out of each charger. In other words, how much current can you pull until the current limit of the regulator kicks in and the voltage severely drops. I measured how much current the Galaxy Note 2 will pull from each charger. The phone dictates the amount of current pulled as long as that current level is below the maximum current of the charger (he lists the maximum possible current for each charger). If I hooked up the stock Samsung 2A charger to a GS2, it would likely draw less than 1A because it has a smaller battery so it is designed to charge at a lower current. All my results are specific to the Galaxy Note 2.

Here's another crazy data point. I tried 3 different chargers and 4 different USB cables with a killawatt. The stock white cable pulled at least 1.5 more watts than the other cables, which were note1, evo3d and monoprice cables.
At this point I think Samsung increased the wire gauge on the note2 USB cable, to get the resistance down a bit. Hmm this might even be measurable. More stuff to check out tomorrow.
Oh, I tested several 2amp or greater power supplies, and the stock note2 PSU always did slightly better.

[REVIEW] Tenergy and Powermod Quick Charge 2.0 Chargers

A review for the following products:
Tenergy AC Wall Fast Charger with Qualcomm® Quick Charge™ 2.0 technology
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Powermod Quick Charge 2.0 Certified D/C In-Vehicle Car USB Charger
Both chargers are as fast as advertised over my stock HTC A/C charger that came with the phone and my Rockfish car charger I've been using since my HTC Vivid days.
They both came in nice retail packaging and the Powermod car charger comes with a nice (but short) USB cable. The Tenergy wall charger has an LED on it and it is blue when an non QC 2.0 device is plugged in and turns green when a QC 2.0 compliant device is plugged in. Unfortunately the car charger doesn't have this feature. It has a blue light that rings the device but only indicates that it has power. It doesn't change color when a QC 2.0 compliant device is plugged in.
I have found that both of these chargers will not charge my Asus Transformer TF201. I find this strange because I've used other USB style wall chargers with my Asus data cable (the transformer has a proprietary changing port connector) that worked just fine. Still doing research on that one but I'll not be using these to charge my tablet. I just wanted to point this out as some of these QC manufactures say they are backwards compatible with most devices. YMMV.
I've been using both for about 3 weeks and am very happy with the performance of both units.
Below is data from a series of comparison tests to show how much faster the Qualcomm QC 2.0 chargers are over stock type chargers. The data in the HTC vs. Tenergy charger is an average of 4 charges per device. The HTC vs. Tenergy temperature comparison chart is through one full charge cycle from below 20% to 100%. As you can see the QC 2.0 does charge at a higher temperature. I also took the temperature while charging on QC 2.0 with my DotView case on and at 50% the temperature on the back of the case was 91.4 F. I have taken my phone temperature after heavy gaming and the back has actually gotten hotter just playing games than at any time during the charging cycle with QC2.0. I used a IR handheld thermogun we use at work.
The Powermod and Rockfish data is from my commute to and from work that is on average 30 minutes. There are 4 charge cycles for each devise over a 30 minute period.
Conclusion:
The performance of both units is great compared to stock. Since I can already get a full day worth of battery with between 15 and 20% left after a typical day both these chargers just make life easier. If you have to go somewhere but still have 30 minutes before you leave you can "top off" your battery before leaving if you are low. Example, you realize you have less than 10% battery but have some time before you have to leave. Plug you QC 2.0 charger in and get to at least 50% in that time. I feel much better walking out the door with 50% than 10%. With the car charger you can keep your battery "topped off" between destinations. Time will tell on the longevity of the phone battery and the chargers themselves.
I hope you've found this helpful.
I recommend both of these units.:good:

Images do not work here...

OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!

waynerbbx said:
OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!
Click to expand...
Click to collapse
I'm pretty sure this and this is what OP has in mind, but I could be wrong.

Actually I'm not sure why my pictures are not showing up. I have my pictures set to public. I'll move them and try another location as soon as I get to work.
I see the pictures.........anyone else see them?

Pictures are working now. And holy cow..that's some impressive work Thanks for taking the time to test it all!

Thanks for the input.
I have the Tenergy wall charger and I have been pleased with the results. I will probably buy the same car charger you have next.

Glad everyone seeing the data now. I put this together because of all the questions on QC 2.0 that past few months.
BTW - I do crap like this all the time at work so it really wasn't that much work other than gathering the data. The charts etc took less than an hour to create after I had all the data I wanted.

Cheers mate!
Great data indeed
Sent using Tapatalk

abyssis said:
I'm pretty sure this and this is what OP has in mind, but I could be wrong.
Click to expand...
Click to collapse
Interesting! Thank you for sharing the links!

Thanks for your input M8!

Nice review,thanks!

I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?

Phrostbite said:
I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?
Click to expand...
Click to collapse
The car charger doesn't indicate if it's charging at QC 2.0 specs. Only the wall charger does that. The only way you can tell that the car charger is doing it's QC 2.0 is by the battery level or using an inline USB current meter that will show the charge rate.
Sorry for the confusion, I'll update my review.

Quickcharge 3.0 Choetech

Picked up a Choetech Quick Charge 3.0 charger and compared w/ the 2.0. It's super convenient to charge 0-100 in no time. Quick Charge as most of you know, allow for high levels of current to flow to the battery, in an attempt to maximize its charging efficiency. Quick Charging also tend to charge their batteries at higher voltages, allowing for a higher rate of power transfer through commonly found cables. The downside to all this is that it can limit the life of your battery since they get hotter. This is the BIG selling point between 3.0 and 2.0, not necessarily charge times but battery life over the long haul. Different batteries require different charging voltages and QC 2.0 supported four modes at varying power levels, 5 volts/2amps, 9V/2A, 12V/1.67A, and a 20 volt option. QC 3.0’s uses voltage between 3.2V and 20V at 200mV increments, allowing for a wider selection of voltages.
This is useful as it reduces the amount of energy wasted during charging. Wasted energy is a big deal because all that extra power would be lost as heat. See, that's what makes the battery run warm thereby limiting the longevity of the battery's life. By having the wider range of voltage you waste less power and that results in less heat, which for you means longer battery life a year from now.
When I tried this with the Note 5, I didn't notice a significant increase in charging time but I did notice less warmth on the back of the phone. Does that prove it's working? I'm not sure but if the option exists, I'd rather try to extend my battery life if possible.

Deleted

No link and pictures?

seoulbrova said:
Picked up a Choetech Quick Charge 3.0 charger and compared w/ the 2.0. It's super convenient to charge 0-100 in no time. Quick Charge as most of you know, allow for high levels of current to flow to the battery, in an attempt to maximize its charging efficiency. Quick Charging also tend to charge their batteries at higher voltages, allowing for a higher rate of power transfer through commonly found cables. The downside to all this is that it can limit the life of your battery since they get hotter. This is the BIG selling point between 3.0 and 2.0, not necessarily charge times but battery life over the long haul. Different batteries require different charging voltages and QC 2.0 supported four modes at varying power levels, 5 volts/2amps, 9V/2A, 12V/1.67A, and a 20 volt option. QC 3.0’s uses voltage between 3.2V and 20V at 200mV increments, allowing for a wider selection of voltages.
This is useful as it reduces the amount of energy wasted during charging. Wasted energy is a big deal because all that extra power would be lost as heat. See, that's what makes the battery run warm thereby limiting the longevity of the battery's life. By having the wider range of voltage you waste less power and that results in less heat, which for you means longer battery life a year from now.
When I tried this with the Note 5, I didn't notice a significant increase in charging time but I did notice less warmth on the back of the phone. Does that prove it's working? I'm not sure but if the option exists, I'd rather try to extend my battery life if possible.
Click to expand...
Click to collapse
I have the same exact charger; in my opinion the best feature of this charger is that it can charge both my Note 5 and Nexus 6p which uses type-c usb. Both charges as quick charging/rapid charger. Here's my amazon review:
Quick Charger 3.0 from CHOETECH delivers outstanding performance again.
It’s not surprising CHOETECH delivers another solid high performing wall chargers. What I’m extremely happy about is the fact not only does this charger quick charge my Note 5, but it also rapid charges my Nexus 6p. Now I only have to carry one charger with my while out and about. Depending on which item you buy on Amazon, the unit comes with a 3.3 feet USB cord and the wall charger. If you ever owned a CHOETECH product, you already are aware the quality speaks volumes about the company and products.
Pro’s:
Materials used are top notch.
Quick charges both Note 5 (as well as other Android phones) and Nexus 6p (type c) devices.
Built in technology to ensure you don’t over charge/burn out your battery
Price is extremely fair, not only do you get top quality but you get it for a lot less than OEM’s.
Con’s:
I don’t have any cons pertaining to this charger, chargers are expected to do one think correctly which is charging your phone. This not only charges your phone, but it provides quality while ensuring safety for your phone.

I also bought it 1.5 months ago but sometimes you charge and others don't

Note 5 is not quick charge 3.0 compatible. A 3.0 charger will work with the note 5 but using quick charge 2.0
Sent from my SAMSUNG-SM-N920A using Tapatalk

{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my SAMSUNG-SM-N920A using Tapatalk

joerolando2701 said:
Note 5 is not quick charge 3.0 compatible. A 3.0 charger will work with the note 5 but using quick charge 2.0
Sent from my SAMSUNG-SM-N920A using Tapatalk
Click to expand...
Click to collapse
OP experiencing placebo effect, maybe?

Sharpshooterrr said:
OP experiencing placebo effect, maybe?
Click to expand...
Click to collapse
Or maybe it is just more efficient, so it works better with 2.0 devices than 2.0 chargers.

Quick Charge 3.0 charges are backwards compatible to Quick Charge 2.0 and Quick Charge 1.0 devices. Meaning, it will work on your Note 5 at Quick Charge 2.0 speeds only.
Sent from my SM-N9208 using Tapatalk

Confused
swiftden said:
Quick Charge 3.0 charges are backwards compatible to Quick Charge 2.0 and Quick Charge 1.0 devices. Meaning, it will work on your Note 5 at Quick Charge 2.0 speeds only.
Sent from my SM-N9208 using Tapatalk
Click to expand...
Click to collapse
The data above seems better than Quick Charge 2.0 speed

Charging an S7 Edge/Flat using a 9V rectangular disposable battery

Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

annson08 said:
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
Click to expand...
Click to collapse
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.

Michaelmansour1997 said:
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Click to expand...
Click to collapse
No, you don't understand. What you're talking about is INPUT voltage of the wall charger. Take a look at our stock wall charger, it has an OUTPUT voltage of 5V and 9V. Qualcomm quick charge 2.0 enables our phones to be charged on higher voltage (up to 12V). In the case of our s7e, it's only 9V afaik. I'm not talking about ordinary phones, I'm talking about phones with quick charge 2.0. You can even look at our battery info in the settings, it displays that our battery is rated at 9V. Here let me take a screenshot of it.
Spoiler
Sent from my SM-G930F using Tapatalk

It's an interesting topic. The OP is correct about the voltage regarding supported devices, the input voltage is irrelevant, as the output is always going to be transformed to appropriate DC voltage by any supported device. The phone (and all battery powered electronics, such as laptops, watches, etc) can only accept DC, or they would probably explode.
As far as using a 9v battery, I'm skeptical you'd be able to effectively charge a phone with it. Yes it produces 9Vs, but are designed to be used at low amperage, 8 milliamperes (Fast chargers use 2 amps)...moreover, from what I've read they generally only store 400-1000 mah. Considering our phone batteries hold 3600 mah, it would make a single 9v battery fairly useless for charging. If you used several in parallel perhaps.
Or perhaps one of these at 3500 mah... http://www.batterymart.com/p-ulhd6vsc-ultralast-6v-heavy-duty-lantern-battery.html ...but it would have the same problem with being designed for low amperage. If the phone drew the voltage at highers amps, it would heat up the battery and probably lower the total charge it would provide.

I think turbo has the right idea. Alkaline 9v has about 600 mah so to fully charge a dead battery , you would need to parallel about 6 together. And it would probably take awhile. Cheap rechargeables often are between 7 and 8 volts so to be cost efficient would be difficult but the idea in general should work. Good outside the box thinking OP!

I... maybe....
I dunno maybe it's just me but...
...why!?
Just buy a rechargeable battery pack and be done with it. Honestly see no point or reason to want to do this outside of pure intrigue. Nobody is going to carry around several 9v batteries and even less likely to want to carry a lantern battery!