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The Optima D31M Blue Top Battery from Johnson Controls Battery Development

Optima D31M is designed for dual use Deep Cycle and starting Applications
Optima D31M Technical Drawing (PDF)
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Shipping/Delivery Included: $269.99


Optima D31M Specifications:

Voltage 12v
Length - in(mm) 12.81
Width - in(mm) 6.50
Height - in(mm) 9.38
Weight 59.80 lbs / 27.00 kgs


Optima Batteries
Click to enlarge



Optima Battery
Part Number
Cold Cranking Amps
32° 0°
Rated Cap.
Amp. Hrs
20 Hr Rate
Minutes of Discharge
25 Amps
Optima D31M 1125 900 75 155

Shipping/Delivery Included: $269.99



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Optima D31M Technical Drawing (PDF)
 Description of Optima Battery:
These batteries are dual purpose. They are designed for engine starting and deep cycling applications and for use in boats with large accessory loads.

Recommended charging information:
Alternator:
* 13.65 to 15.0 volts, no amperage limit.

Battery charger:
* 13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate.

Cyclic Applications:
* 14.7 volts, no current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 2 amp constant current for 1 hour for D34M and 3 amp constant current for 1 hour for D31M.

Rapid Recharge:
* Maximum voltage 15.6 volts (regulated).

Maximum current:
* No limit as long as temperature <125°F (51.7°C).

Maximum recharge time:
* Charge until current drops bellow 1 amp.

Float charge:
* 13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage).

All limits must be strictly adhered to or warranty is voided.

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