A-A-50618 Battery, Storage (Portable, Sealed, Maintenance-Free, Lead-Acid) 6 Volt, 300 Ampere-Hour Type 6V-S-300 AhThis Commercial Item Description covers a 6 volt (normal and reversed), 300 ampere-hour sealed, valve-regulated lead-acid (VRLA), storage battery with a low rate and deep discharge duty cycle for use on Naval surface ships.

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A-A-50618

When the battery intercell connector location is not designated, the battery top will appear as shown below:

Salient characteristics. The product shall be a 6 volt (normal or reversed), 300 ampere-hour sealed lead-acid storage battery, meeting the requirements specified below.

1. Dimensions. The maximum dimensions for the battery shall be:

length - 20.3 inches

width - 9.9 inches

height - 9.8 inches

2. Weight. The battery weight shall be 121 pounds maximum when filled.

3. Terminals. The terminals shall be posts with lugs capable of receiving a round end lug accepting an AWG #0000 cable.

4. Pressure relief valve. The battery shall have sufficient pressure relief valves to prevent rupturing of the battery when internal pressure exceed battery design pressure.

5. Capacity.

a. The capacity for the 30 ampere (or 10 hour) rate shall be a minimum of 300 ampere-hours with a cut-off voltage of 5.25 volts in the temperature range of 20° to 27° C.

b. The capacity for the 97.5 ampere (or 2 hour) rate shall be, a minimum of 195 ampere-hours with a cut-off voltage of 4.8 volts in the temperature range of 20° to 27° C.

6. Reverse capacity. The battery shall deliver 25 amperes for a minimum of 600 minutes at 25°C with a cut-off voltage of 5.25 volts.

7. Retention of charge. The battery shall retain at least 80% of the 10 hour-rate capacity (300 ampere-hours) 28 days after charge termination when discharged at the 10 hour rate.