A-A-50614
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 10 ampere (or 10 hour) rate shall be a minimum of 100 ampere-hours with a cut-off voltage of 10.5 volts in the temperature range of 20° to 27° C.
b. The capacity for the 32.5 ampere (or 2 hour) rate shall be a minimum of 65 ampere-hours with a cut-off voltage of 9.6 volts in the temperature range of 20° to 27° C.
6. Reverse capacity. The battery shall deliver 25 amperes for a minimum of 150 minutes at 25°C with a cut-off voltage of 10.5 volts.
7. Retention of charge. The battery shall retain at least 80% of the 10 hour-rate capacity (100 ampere-hours) 28 days after charge termination when discharged at the 10 hour rate.
8. Cycling. The battery shall be capable of 270 cycles minimum. The cycles shall consist of any combination of the requirements listed in paragraphs 5 and 7 with a minimum of 80% capacity at the specified rate. At least one cycle of each capacity check listed in paragraph 5 shall be conducted for verification. Only cycles yielding 80% or greater capacity are to be counted.
Charging shall be conducted with a constant potential charger set at 14.1 volts with a limiting current of 20 amperes.
9. Each battery shall be provided with a lifting device or system to facilitate manual or mechanical handling.
10. Bid samples. When specified in the solicitation, bid samples shall be furnished.
Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this Commercial and that the product conforms to the producers Item Description, own drawings,
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