In order to prolong the life of your SYLVANIA AI420P replacement battery please read the following:
Your SYLVANIA AI420P battery is charged during production in order to test it. Your SYLVANIA AI420P rechargeable battery will discharge between the end of the production and the moment you receive it. That is why your SYLVANIA AI420P 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 SYLVANIA AI420P battery and prolong the life of your camera power supply.
Your SYLVANIA AI420P 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 AI420P battery will discharge. If you intend to leave your SYLVANIA AI420P 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 SYLVANIA AI420P battery.
Rather than supplying original SYLVANIA AI420P batteries, we supply replacement AI420P batteries made by Uniross and Hahnel. Our AI420P 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 AI420P battery.
| 
