And when you drain the pan, that nook will drain first, while most of the rest of the pan still has lots of goo in it. It’s hard to inform how the battery’s doing without timing it all the best way until the cellphone dies by itself. Now in reply to a different of your questions, it’s very inaccurate to assume remaining charge based on voltage, because the voltage drop during a relentless discharge from full the empty just isn't linear. The voltage drops so much at first, then nearly levels out for most of the cycle, and then drops shortly close to the top. So if your device is using the voltage to estimate cost, that may explain why yours rapidly goes from a hundred% to eighty% as quickly as you unplug it.

This in all probability means not using a wall or automotive charger, but solely charging from a pc’s USB port. USB port normal most output is just 500mA, so that may assist lots. I actually don’t know the way a lot votage charge my battery is getting however I wish to avoid the two extremes of 4.2V charging and in addition below 20% the place it puts pressure on it.

@vince yeah I agree it be an excellent science experiment and would help to reply some unaswered questions from doubters and limit the debates whether charging discharging initially improves the battery capability. If I’m using the phone for a very long time, video, gps, or something that keeps the screen on, the voltage will finally read very low. But after I stop utilizing it and await a while, the voltage will come again up on its own, even without being plugged in.

It offers me sufficient to design the charger for this chemistry. There’s also chips from a number of manufacturers that will do the identical. Also, good tip about turning off the system when charging. I suppose that is why so many GPS batteries have died… i was charging the battery while using it. I assume one of the best factor you can do, for what you want, is to ensure you all the time cost it slowly.

I cant make sure whether I’m even getting most capacity out of the battery or whether it’s solely charging as if it’s a 2100mah battery. I used to design battery chargers, and I like this article.

And should you have a look at the table on the high of this article, you’ll see that the voltage of the battery will attain four.2v lengthy before the battery is fully charged. I prefer to think about cost as a thick goo, and a battery as an enormous shallow pan, which you solely fill from one corner, and the voltage is the height of the goo at that corner of the pan. Because the goo may be very thick and sticky, if you’re filling the pan, the nook that you simply’re filling will get full first, but should you wait long sufficient, all of the goo will eventually even out all through the pan.