BATTERY TESTING INFORMATION
GENERAL INFORMATION
All sealed lead-acid batteries in fire alarm service should be tested annually.
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Replace all sealed lead-acid batteries that have been in service for four or more years.
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It is recommended that a battery tester made specifically for checking sealed lead-acid batteries be used.
Such a tester is available under Service Part No. 553-602.
If a battery tester is unavailable, the “voltage response test” described below can be used to detect batteries with
very low capacity or shorted cells.
Important: A defective battery charger circuit can cause battery failure. Check the condition of the battery charger
when either a battery tester or a voltage response test reveals weakened batteries.
TESTING
1. Connect a digital voltmeter across the battery.
2. Connect the appropriate sized resistor(s) (see Chart 1) across the battery’s terminals for the listed test time.
3. Record the end voltage reading.
4. Treat the battery as described in Chart 2.
CHART 1
12 110 1 .o 150 382-090 (3 in parallel) 4 Seconds
* Test 2 batteries in series for 12V
* * * CAUTION * * *
Resistors will get hot during test!
Use 12AWG wire for battery-to-resistor hookup.
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