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Calculating the Alarm Battery Size Needed
24-07-2018, 10:49 PM,
#1
Calculating the Alarm Battery Size Needed
Determine the total device current draw after filling in the
DEVICE CURRENT DRAW SHEET. To this figure add the 100 mA that is drawn by the control panel itself. Then, to determine the battery size needed, use the following formula:

Total Current Drawn x Number of hours standby wanted = Battery Ampere/Hours.
Convert mA figure to decimal Amps (see example 1000mA = 1 Amp).

Example:
If total auxiliary device current drawn is 450 mA, add 100 mA for the control panel, for a total of 550 mA (0.55 amps); if 24-hour standby is wanted, the calculation will be:
0.55 mA x 24 hours = 13.2 Ampere/Hour battery needed.
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