[TouchPad Development] lippy lipkowski:
This is a Fairly Typical Profile for a Possibly Spent Lithium Ion Battery

What you need to do is attempt to reform the battery. If you have a dock you have a better chance of this working. The reason being is that the dock charging circuit will take the battery up into the 4147 Millivolts (4.147 Volts) rang

For some reason, a stock 2 Amp HP charger directly plugged into the USB port will only yield a 4099 Millivolt charge level.

It doesn't seem real significant, but from the Li-Ion battery's perspective it is significant in that it allows the chemistry to be stretched / forced in the CHARGED state much more thoroughly and over a much longer period of time by just letting it roast in the dock and top off for a few days. Bettery monitor widget will then give you that higher 4147 voltage reading.

I have tried this on multiple tablets and multiple docks and chargers and the results are identical so there positively seems to be a hard cut off at 4099 Millivolts using the USB port and a stock charger and the dock charging yields the 4147 consistently after about 24 hours in the dock.

So charge your tablet maximum and if you have a dock let it roast in there for a couple of days. If you HAVE to use it use it in the dock, OR use it plugged into stock charger and put it back on the dock when done.

Leave it on the lock screen in the dock as this will heat the device and thus the battery

The battery is MUCH more apt to reform / reflow the crystallized electrolyte paste if the battery is warm.

The induction coils (fancy name for circular transformers) in the dock and tablet are responsible for the heat, getting Lithium Ion cells to warm is what has been causing the Note 7 cells to ignite, but that is actually the CELL heating due to charging current meeting too much electrical resistance in the paste that is the electrolyte due to poor quality of the material and a VERY aggressive charging current profile chosen by Samsung.

But the heat caused by the dock and Touchpad's coils is a mild heat and only indirectly warms the battery and allows the paste to uncrystallize over a long super low current trickle charge like the dock slaps on it.

Once you are seeing the 4147 millivolts in Battery Monitor Widget (3C is the dev and it is up at the Play Store free) then what you need to do is start playing video with the tablet IN THE DOCK.

The reason to leave it in the dock is this, the induction coils will begin to provide the current for playing the video which BMonWidget shows is about 1200-1400 Milliamps (1.2-1.4 amps). The induction coils will again warm the tablet. The tablet will be cool once it is charged up to 4147 Millivolts if you have it off OR if you leave the lock screen on, it will still be warm heh. Regardless, find enough video to play for 4 hours or so at HD and let it rip while the tablet is still in the dock.

After about 5 minutes or so, remove tablet from dock and allow video to continue playing and be sure to observe it when it starts getting down below 20 percent.

Once it is fully drained whether you get the abrupt shut off at 20 percent like before, or a proper drain below 20, let it keep playing video until the low battery sound from the Android OS blorps off......then using the stock HP charger and the USB cord, charge the tablet via the USB port to give it a full 2 AMP charge vs the Maximum 1.4 AMP charge it can take from the dock.

Once BMonWidget shows it up to 4099 Millivolts on the USB port, drop it back in the dock and let it trickle up again with the lock screen on so it gets warm..........AND if necessary....REPEAT! hehehe

Hope it helps. I have reconditioned 2 of them this way. One was my Fathers that I inherited and had not been used in 2 years and the other was one I got wicked cheap on E-Ghey that had a marginal battery.

It worked well both times and those tablets are 2 of the 6 in my Touchpad arsenal! Weeeeeeee! heh