Appendix B: Worksheets 
 
190  P/N 3102351-EN • REV 005 • ISS 28DEC18 
Battery calculation worksheet 
Use this worksheet to determine the minimum amp hour capacity required for the panel’s 
standby battery. You can obtain operating current requirements for notification appliances from 
their respective installation sheets. 
Battery calculation worksheet 
    Standby 
current (mA) 
  Alarm (Fire) 
current (mA) 
   
Control panel 
(use Worksheet A and place totals here) 
           
Auxiliary/smoke power 
(use Worksheet B and place totals here) 
           
NAC 1             
NAC 2             
NAC 3             
NAC 4             
Total current             
Operating time required    ×
hr
  ×  min     
             
Total CO mAh (from Worksheet C) [2]        ÷ 60     
   
    +
  =  mAh
                × 1.2 
                mAh
                ÷ 1,000 
Battery size [1]                Ah
[1]  Battery size may not exceed 26 Ah for UL/ULC systems. See Appendix A “Panel specifications” on page 
185 and “Battery wiring (TB8)” on page 8 for battery details. 
[2] Worksheet C for CO device current loads is not required if the system is monitored by a supervising station 
with emergency response per NFPA 720.