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Welcome to Hawker Battery
What is AGM?
Absorbed Glass Mat (AGM) batteries use a fiberglass-like separator to hold the electrolyte in place. The physical bond between the separator fibers, the lead plates, and the container makes AGMs spill-proof and the most vibration and impact resistant lead-acid batteries available today. Even better, AGMs use almost the same voltage set-points as flooded cells and thus can be used as drop-in replacements for flooded cells.
What is Cold Cranking Ampere (CCA) Rating?
The Cold Cranking Ampere (CCA) rating is the industry rating that measures the cranking power a battery has available to start an engine at 0º F. The Battery Council International defines CCA as the number of amperes a lead acid battery at 0º F can deliver for 30 seconds while maintaining at least 1.2 volts per cell or 7.2V per 12V battery.
What is Cranking Amperes Rating?
Cranking Amperes are the discharge load in amperes which a new, fully charged battery at 32°F (0°C) can continuously deliver for 30 seconds while maintaining a terminal voltage equal to or greater than 1.2 volts per cell or 7.2V per 12V battery.
What is Reserve Capacity (RC)?
A battery's Reserve Capacity represents the length of time the battery can maintain the vehicle's electrical needs in the event of alternator failure. The Battery Council International defines Reserve Capacity as a measure of the time (in minutes) a lead-acid battery can deliver 25 amps at 80º F while maintaining terminal voltage of at least 1.75 volts/ cell or 10.5V per 12V battery.
What is Parasitic drain?
Parasitic drain is a load put on a battery with the engine switch off. Most tactical and combat vehicles have radios, BFT, PLGR's, and other equipment that if installed improperly will drain the vehicle batteries. If you are experiencing constant "dead" batteries the question you need to ask is "why", and the first places to look for answers are the accessories that might be causing excessive parasitic drain.
How can I determine what is the correct battery for my vehicle?
The Hawker® ARMASAFE Plus 12 volt battery (NSN 6140-01-485-1472) is a direct drop-in replacement battery for any platform where the 6T series 12 volt flooded-cell battery was installed. If your equipment requires a different size/voltage battery, please contact us so we may suggest a replacement battery.
Temperature Effects on Batteries:
Battery capacity (how many ampere hours it can hold) is reduced as temperature goes down and increased as temperature goes up. This is why your vehicle battery dies on a cold winter morning, even though it worked fine the previous afternoon. The Hawker® ARMASAFE Plus is tested by EnerSys® and the US Government to perform at extreme hot and cold temperatures (-40°C to +80°C) -40°F to +176°F.
Do the batteries come with a warranty?
Yes, the batteries come with an 36-month limited warranty; see our Technical Information section for details.
Common causes of battery failure are:
Insufficient engine run time in which the vehicle's charging system cannot adequately replace the amount of energy it removed to start the vehicle.  

Key off loads
such as engine/transmission microprocessors still draw current from the batteries even when the switch is in the off position. Some key off loads are also called Parasitic drains, which are small shorts in the wires of one or more pieces of equipment on the vehicle. These are not generally large loads that trip a fuse or breaker, but tend to drain batteries down over time.

Deficit charging occurs when the vehicle cannot fully charge the battery during normal operation. This results in a decline in capacity (shorter run time of electronics) and reduced battery life. Typical causes are: engine alternator voltage and/or amperage are too low, engine run time not long enough to recharge batteries, and high accessory loads (lights, radios, etc.). Solutions may be to install a higher amperage alternator; shut off accessories when possible and/or leave engine running and periodically use an external charger to fully charge the batteries.

Placing a partially discharged battery in storage for extended periods of time will cause the internal battery plates to sulfate. This shortens the battery's life span drastically by reducing how much charge the battery can hold and release. Check batteries before storing vehicle and recharge batteries to full capacity if needed. If the vehicle, or equipment is not used on a regular basis, periodically check the battery OCV and charge when voltage readings are 12.65 or less for the ARMASAFE Plus.

Self discharge occurs in all batteries but to different degrees based on chemical composition. The Hawker® ARMASAFE Plus has a low monthly self-discharge rate of less than 1%, attributed to the purity of the lead (99.99%) and electrolyte. If the vehicle or equipment is not used on a regular basis, periodically check the battery OCV and charge when voltage readings are 12.65 or less for the ARMASAFE Plus.
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"On every automotive platform, the process of shooting, moving, and communicating begins at the battery. This training provided invaluable knowledge into battery maintenance that is a must for any successful maintenance program."
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