Sherlo Tronic 3AMP Battery Back Up PSU For Lithium Battery The Sherlo Tronic 3AMP Battery Backup PSU is a high-performance power supply unit specifically designed for lithium batteries, providing reliable and efficient backup power solutions. With its robust microprocessor-controlled charging output, this unit ensures optimal battery performance and longevity. It features a low battery cut-off mechanism that activates at 10V DC, preventing over-discharge and potential damage to the battery. Additionally, the unit is equipped with audible buzzer alerts that notify users of low battery status and AC power failures, enhancing operational safety and reliability. This versatile PSU is ideal for various applications, including alarm panel backups, CCTV systems, door controllers, and magnetic locks for access control solutions. Its design incorporates a resettable fuse protection system on the output, along with fuse protection on the AC input, ensuring comprehensive safety against electrical faults. The enclosure is constructed from durable ABS plastic, making it suitable for both indoor and outdoor environments.