Have you ever been using your webOS phone, browsing the web or playing a game, knowing that you had plenty of battery left and then all of a sudden the battery level drops to 0%? And then shortly afterwards, the phone shuts down because it thinks there is no battery left even though you know it has plenty of juice in there? While this bug doesn't hit often (and seemingly most often on a Pre3), it seems to rear its ugly head at the worst possible times just when you need your phone most. The good news is that there is a rather simple fix for this, the bad news is that it may be a bit inconvenient for you.
Actually, the simplest way to fix this is to swap out the battery with a spare, if you have one. If you don't have an extra battery with you, all you need to do is plug in your device to a power source and leave it plugged in for a bit until the device recalibrates the battery to the correct level. Once your phone turns back on, it will still only show a low battery level, typically under 5%. But if you keep the phone charging, it will eventually jump back up to its "correct" levels. It may slowly charge up to 20% after 10 minutes and then jump to 90%, or it may take 20 minutes and then go back to 100%, or it may only take 5 minutes, but eventually it will return to normal. Here's just hoping that the next time this happens you are close enough to a power outlet to charge up your phone, otherwise you will have a nice paperweight that you get to carry around for a bit.
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