In order to prolong the life of your Contax SL300R replacement battery please read the following:

Your Contax SL300R battery is charged during production in order to test it. Your Contax SL300R rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your Contax SL300R 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 Contax SL300R battery and prolong the life of your camera power supply.

Your Contax SL300R 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 SL300R battery will discharge. If you intend to leave your Contax SL300R 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 Contax SL300R battery.

Rather than supplying original Contax SL300R batteries, we supply replacement SL300R batteries made by Uniross and Hahnel. Our SL300R 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 SL300R battery.