I\'m using a spare EA-70 charger with my C-860, and it works like a charm. It\'s 2amps instead of 1amp, but don\'t let that concern you, amperage is only a measure of the MAXIMUM load a charger can take, nothing more. Also, the charger for the 5500 that I got and \"modified\" for my 5600 charges the batteries externally for C-860 perfectly. Nothing like a spare !