... after 12 months at store, good capacity retention. Ready to Use: Pre-charged, ready for immediate use.Low self discharge: The Energylock holds ... 12 months when store, good capacity retention.4 Times Longer Lasting: Energylock takes 4 times more shots than alkaline battery for ... , game,flashlight, Remote control, Toy, MP3/MP4 player, Electric razor. Ready-to-Use NI-MH AA 2100MAH batteries