Appendix B: Worksheets 
196  Vigilant VS1 and VS2 Technical Reference Manual 
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 
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
 
 
    
 
 ÷ 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 191 and “Battery wiring (TB8)” on page 7 for battery details.