Quote:
Originally Posted by BJ
As crazy as it sounds, if you heat a dead Ipad (Air 2 in my case) over the stove until it is hot to the touch, it will begin to charge a completely dead battery.
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This is crazy and here's why.
Very cold Lithium Ion batteries don't work, often a small heating component is added to Lithium Ion to bring it to a slightly warm temperature so that the battery will work.
However when applying excessive heat to the battery you can trigger minor thermal runaways within the battery and these are what you were seeing happen when the battery recovered slightly.
Now what you have is a working iPad which is actually a time bomb without a set time. It could be days or it could be weeks or it could be a year - but at some time from now that battery will fail in spectacular fashion.
You NEVER apply excessive heat to a Lithium Ion battery, there are complex formulas to apply to work out safe levels of heating for very cold batteries (such as those used in outdoor applications) however what you have done is very very dangerous.