Theo&Cleo Battery Charger for Nikon ENEL9 EN-EL9 EN-EL9a D40 D40X D-40 D60 D5000 D3000 NOTE: For a successful and safe charge of your battery, make sure to correctly align polarity ( positive / negative) before placing battery into charger. Complete charging solution for digital video batteries High quality battery charger is a handy companion for digital shooting Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock Smart LED indicator shows charging status