Sorry for explaining it wrong. In the menu you can check if the battery is at its end stage and needs to be replaced (and not to be recharged). When that happen, the V1 will inform you the battery cannot be used when you insert it in. The same battery can be used on a D7K or D800 though. It is possible you have a bad battery, sometimes it happens when you drop it accidentally. Spare batteries are easily available in Asia. They are all from Nikon of course. Not sure why they are so scarce in other countries.