In order to prolong the life of your Concord EyeQDuo replacement battery please read the following:

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

Your Concord EyeQDuo 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 EyeQDuo battery will discharge. If you intend to leave your Concord EyeQDuo 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 Concord EyeQDuo battery.

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