In order to prolong the life of your NIKON NP66H replacement battery please read the following:

Your NIKON NP66H battery is charged during production in order to test it. Your NIKON NP66H rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your NIKON NP66H battery will have to be charged before you use it. You can use your existing charger or an external charger this will optimize charging of your NIKON NP66H battery and prolong the life of your camera power supply.

Your NIKON NP66H rechargeable battery discharges slowly and progressively when not in use. The self discharge rate is about 1% of the battery's capacity per day at room temperature. The higher the temperature, the faster your NP66H battery will discharge. If you intend to leave your NIKON NP66H battery for a prolonged period without use then a service charge is recommended from time to time, taking in to account the self discharge rate and time between using your NIKON NP66H battery.

Rather than supplying original NIKON NP66H batteries, we supply replacement NP66H batteries made by Uniross and Hahnel. Our NP66H batteries have a two year warranty, represent excellent value and meet or exceed the original specifications. We also offer free delivery on all our products including the NP66H battery.