2.These 2.4V 600mah batteries ni-cd are specifically designed for Exit / Emergency Lights
3.This battery works for the following models: TOPA NI-CD AA500MAH 2.4V AA 500mAh Unitech AA900mAh 2.4v AA 900mAh Interstate Batteries NIC1394 Exitronix 10010036 Exitronix 10010034 BST 2.4V AA400MAH JYH AA 400mAh 2.4V P/N6200RP 6200RP 6200 RP Dantona Custom-179 Custom179 Exell EBE-179 EBE179 BEL-179 BEL179
4.Over-voltage, over-current, over-charge, and short-circuit protection