Battery Testing

The following procedure should be used when testing the battery:
1. VISUAL INSPECTION
- Check for obvious damage, such as a cracked or broken case that could permit loss of electrolyte. If obvious damage is noted, replace the battery. Determine the cause of the damage and correct as needed. If not, proceed to step 2.

Built-In Hydrometer:

2. HYDROMETER CHECK .
- GREEN DOT VISIBLE - Go to step 3.
- DARK - GREEN DOT NOT VISIBLE.
- Charge the battery as outlined under "Charging Procedure" and proceed to step 3.
3. LOAD TEST

Battery Side Terminal Adapters:

- Load testing requires using battery side terminal adapters to ensure good connection. Do not load test a frozen battery.
A. Connect a voltmeter and a battery load tester across the battery terminals.
B. Apply a 300-amp load for 15 seconds to remove surface charge from the battery.
C. Wait 15 seconds to let the battery recover. Apply load specified on the battery label or in "Specifications". Read voltage after 15 seconds, then remove load.

Battery Voltage Drop Temperature:

D. If voltage does not drop below the minimum listed in Figure above, the battery is good and should be returned to service. The battery temperature must be estimated by feel and by the temperature the battery has been exposed to for the past few hours.
E. If voltage drops below the minimum listed, replace the battery.