In order to prolong the life of your Olympus Li-42B replacement battery please read the following:

Your Olympus Li-42B battery is charged during production in order to test it. Your Olympus Li-42B rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your Olympus Li-42B 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 Olympus Li-42B battery and prolong the life of your camera power supply.

Your Olympus Li-42B 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 Li-42B battery will discharge. If you intend to leave your Olympus Li-42B 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 Olympus Li-42B battery.

Rather than supplying original Olympus Li-42B batteries, we supply replacement Li-42B batteries made by Uniross and Hahnel. Our Li-42B 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 Li-42B battery.