AGM-D31M, Optima, Bluetop, Group 31M, AGM Battery

BLUETOP® Marine Battery: The BLUETOP starting battery (dark gray case) is to be used when a dedicated starting battery is required; it should never be used for cycling duty. The dual-purpose BLUETOP (light gray case) can be used for both starting and deep cycling; it is a true deep-cycle battery with extremely high cranking power.

Returns And Warranty

Price Disclaimer- This Price is good for current inventory, and may change when additional inventory is received.

24 Month $378.00

10 in stock

10 in stock

Refundable Core Deposit $20.00
Total Payable Amount $398.00

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SKU: OPT_D31M Category:

Additional information

Weight 59.80 lbs
Length 12.81in
Width 6.56in
Height 9.38in
Manufacturer Code

Group Size

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20 Amp-Hour Rate



  • Both dual-purpose and starting applications available
  • Up to 3x more recharges than other marine batteries
  • More than 15 times the vibration resistance
  • Spill-proof
  • Mountable in virtually any position
  • Maintenance-free
  • Optimal starting power (dual purpose and starting applications available)
  • Works well as a boat battery or RV battery

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