In order to prolong the life of your PANASONIC GRAX55U replacement battery please read the following:

Your PANASONIC GRAX55U battery is charged during production in order to test it. Your PANASONIC GRAX55U rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your PANASONIC GRAX55U 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 PANASONIC GRAX55U battery and prolong the life of your camera power supply.

Your PANASONIC GRAX55U 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 GRAX55U battery will discharge. If you intend to leave your PANASONIC GRAX55U 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 PANASONIC GRAX55U battery.

Rather than supplying original PANASONIC GRAX55U batteries, we supply replacement GRAX55U batteries made by Uniross and Hahnel. Our GRAX55U 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 GRAX55U battery.