A-A-50608 Battery, Storage (Portable, Sealed, Maintenance-Free, Lead-Acid) 2 Volt, 10 Ampere-Hour, Type 2V-S-10 Ah

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A-A-50608

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

3. Terminals. The terminals shall be on top of the cell and marked positive and negative and suitable for a screw and nut connection.

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

5. Capacity.

a. The capacity at the 1 ampere (or 10 hour) rate shall be a minimum of 10 ampere-hours with a cut-off voltage of 1.9 volts in the temperature range of 20⁰ to 27⁰ C.

b. The capacity for the 3 ampere (or 2 hour) rate shall be a minimum of 6 ampere-hours with a cut-off voltage of 1.7 volts in the temperature range of 20⁰ to 27⁰ C.

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

7. Cycling. The battery shall be capable of 90 cycles minimum. The cycles shall consist of any combination of the requirements listed in paragraphs 5 and 6 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 2.35 volts with a limiting current of 4 amperes.

8. 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 Item Description, and that the product conforms to the producers own drawings, specifications, standards and quality assurance practices. The government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract.