Check the battery for obvious damage, such as a cracked or broken casing or cover, which could permit the loss of electrolyte. If obvious damage is noted, replace the battery.
Connect a voltmeter and a battery load tester across the battery terminals.
Apply a 300.ampere load for 15 seconds to remove any surface charge from the battery.
Remove the load.
Wait 15 seconds to let the battery recover, and apply a 270.ampere load.
If the voltage does not drop below the minimum listed, the battery is good and should be reinstalled. If the voltage is less than the minimum listed, replace the battery.
