Database Develop

Home made battery for XDA

I've been having a helluva time with the new (internal) batteries available in the market ever since the original Furukawa battery died - the new batteries dont seem to be able to hold charge as well as the original one.
I was wondering whether it would make sense to connect two original nokia batteries (the bl5 looks thin enough) in parallel and connect them to the XDA using the same circuit board that's attached to the furukawa.
(If this works, the battery would maybe even provide more power than the original one!)
Anyone know if this would work?
The nokia battries are about 800mAH each, so if I connect them in parallel, would that raise the rating to 1600mAH?
Cheers
Omi

delayed answer but.. still...
Having an OLD battery on my thing... I'm also considering a "home made battery". Yes, it can be done.... I see no major problems. But remember that a battery = battery + protection circuit. If you put them in paralel, I guess it would be a better idea to strip the two nokia batteries from the protection circuit and use only the ORIGINAL one....
But this is still theory, I didn't tried it yet. But, I'm considering.
The best solution would be in finding a BIG flat battery, not connecting two in paralel.....
bye

If the batteries have the same voltage, and you still have your old one, you could open up all 3 and replace the cells from the nokia with the old cells. The use some shrinkwrap or tape to cever the old on up and plug it back in. As long as the voltages are the same (and they should be if you swap just the cells) then yes you'll have a much higher capacity battery to play with.

Battery Issues

Just to let you guys know, i have a 6515f which i love, but it developed a battery issue about 6 months after i bought it, at first i thought the phone was buggy because it would "brown out" if i treid to run media player or tomtom or anything that requied a bit of juice. I bought a new battery after folllowing a previous thread in this forum, and lo and behold, my issues went away................for 6 months then back to normal, crashing and brown outs. I bought a thicker battery (2500ma) than the standard 1300ma one off ebay from hong kong and i have not had any issues since. my assumption from this, is that htc/HP designed a phone/pda that had too high power requirements for the battery supplied
(hp's official stance on this is that the pins on the battery cover are worn and dont make proper contact to seal the power circuit. You can send it in to them to get a new back (and new battery) but take my word on it, it will do the same in 6 to 8 months.)
NOTE: 6515 does not experience these "brown out" issues while connected to external power source (irrespective of the "bad" case pins)
Upshot of this has been that while my phone now works well, it doesnt fit in my car charger or the desktop cradle because of the thicker battery, reducing its usefullness to me. I am ripping out the sim and buying a p3600i to replace it.
Hope the info about the 2500ma battery helps anyone having "brown out" issues
Edit: the p3600i proved unreliable as a gps so im still using the 6515

Have the same issue.
where can you get the battery replaced?
I have a 2 year 6515 that works perfectly otherwise.

i got mine off ebay for $10 plus postage.. took about a week to get to me.

there are both slim and extra capacity ones at repairHPpda.com
slim one -19.90usd
extra capacity- 24.90usd
http://www.repairhppda.com/index.php?cPath=45_86&osCsid=df7fa56ef75a2dbc7a328d9cb1320d9e

which is the best battery for xda iis

hi all,
I've just bought a 2nd-hand XDA iis and is battery is not so good.
So I intend to buy a new one.
But I'm wondering which bat is the best now.
I've gone to ebay and see that they have some types: original 1500 mAh, 2400mAh, "slim" 3200 mAh and "fat" 3600mAh.
I think the 3600mAh is the most suited for my xda.
Is there any better choice? Where could I buy it?
With the 3600mAh, how long would the xda would last if I use wifi IE with the lowest backlight?
Do any of you have any problems with it?
Could I use my old charger or Do I have to buy a bigger one?
Could I still use my usb-cable (not cradle) for charging my xda?
And is there any conflict with WM5? (I've just read in our forum that someone have problems with WM6).
Thank all of you so much.

son_volam002 said:
But I'm wondering which bat is the best now.
I've gone to ebay and see that they have some types: original 1500 mAh, 2400mAh, "slim" 3200 mAh and "fat" 3600mAh.
Click to expand...
Click to collapse
I would say that primarly it would depend on if a 'fatter' and heavier phone bothers you.
Keep in mind that just about all the cases and various accessories that hold or clip on to the phone are designed for a phone that has the original battery, so a thicker battery may well make them unusable (cases are the primary example I would give).
How long it would last is impossible to say, as it depends on how you use the phone, what apps are on the phone, and so on. Also, 3rd party battery quality does vary. Which manufacture is the best, I can't say as I've never seen any place that reviews battery life.
I've never heard of any incompatibilities when talking about a particular version of win mobile and a certain capacity battery, and can't imagine that it's even possible.
Pick one and see what you get, then post the results here so the every one else can benefit from your experience.

jdc said:
I would say that primarly it would depend on if a 'fatter' and heavier phone bothers you.
Keep in mind that just about all the cases and various accessories that hold or clip on to the phone are designed for a phone that has the original battery, so a thicker battery may well make them unusable (cases are the primary example I would give).
How long it would last is impossible to say, as it depends on how you use the phone, what apps are on the phone, and so on. Also, 3rd party battery quality does vary. Which manufacture is the best, I can't say as I've never seen any place that reviews battery life.
I've never heard of any incompatibilities when talking about a particular version of win mobile and a certain capacity battery, and can't imagine that it's even possible.
Pick one and see what you get, then post the results here so the every one else can benefit from your experience.
Click to expand...
Click to collapse
At last, I've bought a fat 3600 battery and I think it's a good decision.
Now, I can use my fone for browse Internet in near 6 hour with wifi; or I could use it with 5 day stanby (how amazing).
some small problems are:
- the fone is thicker and heavier (no problem with me).
- My third party charger is a bit hotter.
- And the charging time is longer (ofcourse).

do not by batteries by ACME power. I have bought 2400mAh and feel no difference compare to standard old battery. Besides, I have troubles with bt. it turns off by its self with only this battery.

I bought a battery for my Htc Harrier about 4-5 months ago. Sorry i dont know the brand of it but its says its 3200mah and "replacement for XDAIII". The inside of the battery is kind of bloated out from the heat and looks a little dodgy but still works. Ive had a few problems with it where it powers off for no reason. When i turn it on again the battery charge looks fine.
Just a couple of days ago for the first time my phone just completely hard resetted and lost all my data. I again turned it on and the battery charge was fine. im blaming that on my battery.
I use my phone mainly for listening to music on my bluetooth headphones while im driving to school and for typing things out on my bluetooth keyboard at school. The standared battery that comes with the phone simply has not enough charge time to do all this.
With all its annoying problems i still use my battery. I just make sure i back up my most important things on my storage card. And charge it every night.
Soon im going to buy a HTC Blue Angel due to my countrys crappy plans that the Harrier comes with. Maybe i might buy the 3600mah while im at it.
So my advice is if you dont need the charge of a extended battery then stay away. Unless you are like me and need the extra battery power then beware of some stress ahead that it might give you.

[Q] external battery charger

I'd like to use a spare battery for my legend, but i want to charge it with an external charger (i.e. not inside my legend).
Does anyone knows if exists something like that?
Thanks

Some spare batteries you purchase on eBay come with external chargers for a slight increase in price.
Sent from my HTC Legend using XDA App

Found this with a quick google http://www.kidigi.com/product_lv2.php?pid=1147

Battery indicator in phone
drakyoko said:
… external charger (i.e. not inside my legend).
Does anyone knows if exists something like that?
Click to expand...
Click to collapse
I would like to try that too, in this case for one of those many HTC Legend phones that can no longer fully charge their batteries.
The question is, how does the phone deal with a battery that has been externally charged? Does the phone recognize the actual charge status, display it as 100%, and take it into account while deciding when to shut down because the battery runs empty?
If anybody has tried this, please report.
Addendum: It seems that the widespread HTC Legend problem does not affect the actual charging, which keeps working well. It affects only the battery charge percentage display, which is wrong. This means that an external charger would not help.

Replaced my Tab S battery/USB port but still not starting/charging

Hey everyone,
I recently replaced the battery and USB port in my Tab S 10.5 because it wasn't charging properly and the battery eventually died on me. The battery was sitting around for about 1.5 years before I got around to installing it and I believe it was second hand. After replacing the battery/USB port I realised it still wasn't charging so I tested the battery voltage and realised it's 2.81v when it should be 4.2v on both cells when charged (it's a 3.8v battery).
Does anyone know what is the likely problem? I don't know if 2.8 volts is too low or if that's just normal discharge voltage. I need to know if it's worth me buying a new battery or not because obviously I don't want to spend the money on another battery if the problem is something else. Is there any way of troubleshooting whether the battery is the problem or not? What other problems could cause a device to just not start entirely? I know the charging port could be another issue but that's why I replaced it, the replacement was second hand though (despite being advertised as new). Nothing bad has happened to the tablet, I've never dropped it or got it wet for example.
Sorry if this is the wrong place to discuss hardware like batteries but I couldn't find any other place to discuss something like this.
Thanks for any help,

quantumboner said:
Hey everyone,
I recently replaced the battery and USB port in my Tab S 10.5 because it wasn't charging properly and the battery eventually died on me. The battery was sitting around for about 1.5 years before I got around to installing it and I believe it was second hand. After replacing the battery/USB port I realised it still wasn't charging so I tested the battery voltage and realised it's 2.81v when it should be 4.2v on both cells when charged (it's a 3.8v battery).
Does anyone know what is the likely problem? I don't know if 2.8 volts is too low or if that's just normal discharge voltage. I need to know if it's worth me buying a new battery or not because obviously I don't want to spend the money on another battery if the problem is something else. Is there any way of troubleshooting whether the battery is the problem or not? What other problems could cause a device to just not start entirely? I know the charging port could be another issue but that's why I replaced it, the replacement was second hand though (despite being advertised as new). Nothing bad has happened to the tablet, I've never dropped it or got it wet for example.
Sorry if this is the wrong place to discuss hardware like batteries but I couldn't find any other place to discuss something like this.
Thanks for any help,
Click to expand...
Click to collapse
Hello,
Please check the soldering join of the battery socket on the PCB. You may need to use a magnifier or similar tools to get a good look. The solder joins seem to be pretty weak and could be damaged when you replaced the battery. Socket pins on the plastic plug came with those Chinese replacement battery has high insertion force. They make good contact with the pin on the plastic PCB receptacle but could exert excessive force on the PCB join during engaging or removal. It is feasible to repair it if you have suitable soldering tip (chisel type is better) and good eyes. Space is limited due to the RF shielding cage right besides the join. Try going in from the top near vertical way. If available, try working with a microscope.
I went through more or less the same thing you had. First replacing the battery, and port, But performance was strange. Sometimes it charges well to 100% But once in a while it stops in the middle. When the capacity went below 60%, tablet could reset under heavy use. Sometimes it drops from 40% to 15% in less than 15 minutes. It got worse and worse. After installing 3C Battery Manager, I found out there was sudden and severe voltage drop and temperature spike when resetting happens. At the beginning I suspected battery issues as we all know getting those replacement battery is like a gamble. I got another battery from a different vendor and similar thing happened. After fixing the soldering joins, it works really well now and I can enjoy a few days on light use without charging.
Also, some of those replacement batteries are picky on charger. Most likely due to the "innovative" cost-cutting protection circuit design. Some fast charger use a very low charging current and takes very long time to get to 100%.
Good luck !

If it's a multilayered PCB be very careful soldering it. You need to know how to solder well. Excessive/prolonged heating and poor desoldering technique can destroy them.
Replace the battery and go from there. It may have auto shutdown from low cell voltage, if so it's not worth mucking with.
If that doesn't get it's probably a mobo failure of some type.

Hey guys thanks for your replies. Sorry that I forgot about this after I didn't get any replies or I would of updated it. I did manage to get it sorted, the problem was the charger I was using, it wasn't providing enough current so the battery refused to charge at all. It would only charge when plugged into the mains on a decent adapter.