Concorde Battery Corporation offers the RG-131 lead acid aircraft battery, an emergency battery used for back-up and avionics in a wide range of installations. It is a TSO-C173 authorized aircraft battery with a MS3320 20AH circuit breaker output. This Ni Cd battery replacement ships HAZMAT-exempt. For more information visit www.concordebattery.com or call (626) 813-1234.