I have been harvesting laptop battery packs this past few weeks but my luck is not that great i have salvageda 100pcs of red sanyos mostly from acer,gateway and toshiba brands,but others gets hot and others are cool when charging,i just discharged and charge again (3x) -the good ones and they are still cool to to charge.i just want to ask if anyone using it in their packor ( is it safe to use it in a battery pack? maybe 4S10P?)