The Highway Advisory Radio battery backup system is designed to provide emergency power to the HAR for approximately 72 hours in the event of AC power loss.This replacement battery meets the requirement of both applications and the specifications are:
Maintenance-free, deep-cycle, absorbed glass-mat battery (AGM) type no. 8A4D, 12 volt, 198 amp/hour. Size 20 3/4" x 8 1/2" x 10". Weight is 129 lbs.