This battery pack Lithium from Tadiran (SL 750) 1/2AA 3,6V 1100mAh is assembled for Elfa and is tailor-made for each customer. This pack is friendly for the environment. Tadiran Batteries manufactures high-power Li-ThionylChloride batteries. They provide unrivalled performance thanks to increasingly advanced technologies. The batteries prove capable of operating for over 20 years under challenging conditions.