I have seen discussions about replacing power tool high drain 3.7v Li-ion cells with laptop batteries NOT being a good idea (low power drain 3.7v cells in laptop packs). But what about replacing laptop battery cells with power tool cells? Please also comment about issues regarding power tool batteries taking a lot of abuse if heavily used, also if it's a good idea to salvage from a bad battery pack which might contain good cells but also very badly damaged cells (shorted, under voltage etc). Did the BMS "protect" the "good" cells that still test ok? Lastly, the cells do have to match the battery voltage design, either 4.2 or 4.35v since some laptops do not charge to 4.35v and will be stuck charging forever a 4.2v since it's never going to reach 4.35v. Comments, corrections, advice anyone?