. The battery chargers all require you charge 0 batteries at once and the batteries all have to be down on charge when you charge them so if you have a 0 cell lamp you have to somehow draw down the one battery you don't use. A real pita. In addition rechargeables are so much weaker than one-use batteries you need 0 of them to equal a 0 cell setup using one-use batteries. Buckaroo - you might want to read up on modern rechargeables. 