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Advice to freeze your battery.. is when we know that forum icon's have been drinking..
No, I'm kidding. That is sound advice and is known to work, although the chemistry of why it works is poorly understood. I would imagine (if you care) that freezing probably fractures type II lithium metal dendrites that degrade battery performance. Which might be expected to improve extended low current capacity.
So try the freezing trick. After freezing, check that there isn't visible condensation on the battery and IMO you should let the battery warm up a bit before connecting to a wall charger. The benefit should be derived from having been frozen, not needing to be frozen while charging. Charging frozen lithium batteries will cause damage. Although that may be a moot point for a battery nearing the end of it's life.
With any luck this will get you going. If it doesn't then you will probably need to replace the battery. And secure a serial port adapter ($10 or less) if critical boot files are corrupt since you do not have a jailbreak in place.
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