Wednesday, September 7, 2011

Craftsman Li-Ion 19.2v power tool batteries

I have purchased a sizable number of Craftsman 19.2v Li Ion tool batteries that have never been in a tool.

It seems that there was probably a manufacturing glitch  that rendered all these new batteries into unusable fodder.

After receiving the first order I disassembled each battery to analyze the problem. In every case there were a series of bloated cells that were subjected to high voltage, heat or both.

In some cases the pressure in the cells vented fluids into the pack corroding those metal parts that were exposed. Those cells that were not effected were as new, testing to 4.2v each. There were not many in each pack and none in some. There was random bursting of the cells position and that leads to no obvious conclusion as to a specific cause.

Nevertheless, I have assembled a number of those battery packs with existing cells or in some cases new cells and tested them thoroughly, not only with test equipment but in actual tool tests. The performance is exceptional.

I might state that some circuit boards were damaged in the event of question and there is no hope for repair on them.

I have placed one of these rebuilt batteries in my eBay store and have many more available.

This is a great chance to get as close to a new battery as is available at a reduced cost. I am asking $65.00 each for the completely warrantied battery pack.