In order to prolong the life of your SUNPAK AI420 replacement battery please read the following:
Your SUNPAK AI420 battery is charged during production in order to test it. Your SUNPAK AI420 rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your SUNPAK AI420 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 SUNPAK AI420 battery and prolong the life of your camera power supply.
Your SUNPAK AI420 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 AI420 battery will discharge. If you intend to leave your SUNPAK AI420 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 SUNPAK AI420 battery.
Rather than supplying original SUNPAK AI420 batteries, we supply replacement AI420 batteries made by Uniross and Hahnel. Our AI420 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 AI420 battery.
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