LIPO Charging Problem

Use a voltmeter and probe the voltage at the balance tap. Probably 1 cell of the three in the pack has gone bad. Voltages should be close to each other (.02 volts) and above 3 volts minimum. If 2 cheap packs have gone bad at the same time, they may have 2 or all 3 cells gone bad. Trying to 'save' them could get pretty costly and messy... Google "lipo fire" mp

The latter.I have been able to recover some flat lipos to about half capacity. But these days I just chuck them. What use is an overweight LIPO pack anyway?

Operative words: "ON THE CHEAP".

| Do NOT throw those expensive packs away yet! FMA Direct has a charger | called Cellpro 4S that has a special function for reviving packs that | were used too long

You don't need a special charger for this. As another poster suggested, just use a NiMH or NiCd charge function on the bad cells at a very low rate until they get up to 3 volts or so. Be sure to use a low rate and do not leave it unattended, just in case. If something goes wrong and the charge rate is low, it'll puff long before there's any pyrotechnics.

Also don't do this unless you can charge each cell individually (i.e. balance), because the cells are likely to be very out of balance.