The High Tech battery is the primary or backup power supply for the High Tech Pet Door. This 12-volt rechargeable battery ensures that the pet door will still function if the power goes out. For those using the pet door without a wall outlet, the High Tech Battery Charging Kit guarantees that a charged, spare replacement battery is always on hand.
The 12V rechargeable battery lasts around two weeks or 1000 cycles before needing to be recharged.