I'm having the same problem. My camera came with a Nikon battery. Transaction was great, wonderful customer service and everything went smooth until I went to recharge the extra battery. It show it charged but once in the camera, nothing! So they sent me a new battery, nothing again. I leave for WDW next week and really need that back up battery so I'm back on the phone today. Mine is a BP-EL3E they sent me for a D90. (7.4v 2100m Ah Li-ion)