Sherlotronic Intelligent Power Supply Charger 6.4A for alarm panel battery backup, CCTV battery backup, backup power supply for door controller and maglock for an Access Control solution. 6.4 AMP Power Supply Battery charger with Low Battery cut out. Designed with rugged intelligent charging, and with low battery protection. This intelligent power supply or battery charger unit is designed to meet with international safety and certification standards. The unit has under and over voltage protection and is double fuse-protected.