In order to prolong the life of your PANASONIC DS37 replacement battery please read the following:

Your PANASONIC DS37 battery is charged during production in order to test it. Your PANASONIC DS37 rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your PANASONIC DS37 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 DS37 battery and prolong the life of your camera power supply.

Your PANASONIC DS37 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 DS37 battery will discharge. If you intend to leave your PANASONIC DS37 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 DS37 battery.

Rather than supplying original PANASONIC DS37 batteries, we supply replacement DS37 batteries made by Uniross and Hahnel. Our DS37 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 DS37 battery.