Love the drills, hate the batteries. Converted 1 pack to a cord with a 12V cigarette lighter plug. With the cord length I picked (at random) and the various 12V jacks in the boat, I can use the drill almost everywhere. Converted two more packs to NiMh cells, using the original Ryobi charger and one of those plug-in lamp timers. I let one go flat and then give it a 6 hr charge. No, I can't charge them in 15 min like the new Li ion cells, but the NiMh conversion only cost me about $25 per pack.