9v non-rechargable battery to fit the 9v Secur energiser range. Compatiable with 2W solar panel to extend battery life up to 3 to 4 times longer.
Battery life guide:

Barcode: 3415166233006
Compatiable with: Secur 15, Secur 25, Secur 35, Secur 60 Also compatiable with 2W solar panel to increase battery life