All the sensors, and outdoor siren, are 100% wireless and use long life, Lithium batteries. You don't require a special brand of batteries as long as they are long-life Lithium and not rechargeable. We recommend using Energizer batteries for the sensors. Batteries should last for 12-18 months although we do recommend they are changed once per year.
Movement and contact sensors use 1x CR123A battery and the siren takes 8x AA batteries. The batteries in the sensors and siren will at around 12 months and if any of them are running low, you will get a notification through the mobile app so you can swap them out.
Customers who are on our Complete subscription will have all batteries changed annually as part of their annual maintenance visit.
The central hub also has a Lithium Polymer (LiPO) battery that acts as a backup should the mains power fail. This battery can supply the central hub with backup power for up to 12 hours. This battery does not need replacing on a regular basis and is sealed within the hub unit.