In order to prolong the life of your UNOMAT OP2800S replacement battery please read the following:

Your UNOMAT OP2800S battery is charged during production in order to test it. Your UNOMAT OP2800S rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your UNOMAT OP2800S 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 UNOMAT OP2800S battery and prolong the life of your camera power supply.

Your UNOMAT OP2800S 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 OP2800S battery will discharge. If you intend to leave your UNOMAT OP2800S 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 UNOMAT OP2800S battery.

Rather than supplying original UNOMAT OP2800S batteries, we supply replacement OP2800S batteries made by Uniross and Hahnel. Our OP2800S 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 OP2800S battery.