In order to prolong the life of your CANON E90 replacement battery please read the following:

Your CANON E90 battery is charged during production in order to test it. Your CANON E90 rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your CANON E90 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 CANON E90 battery and prolong the life of your camera power supply.

Your CANON E90 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 E90 battery will discharge. If you intend to leave your CANON E90 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 CANON E90 battery.

Rather than supplying original CANON E90 batteries, we supply replacement E90 batteries made by Uniross and Hahnel. Our E90 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 E90 battery.