What does the "Amp-Hour" rating of this battery translate to in deep-cycle mode?

For trolling motor use you would divide the current draw of the motor into the number of amp hours to find out how long the battery would perform at that level.

Does this come with any 5/16 wing nuts for the studs or something's similar?

Yes it does. I'd have to go check, but I think it has a 3/8" stud for the positive and 5/16" for the negative, along with standard battery posts.

I hear these batteries are damaged if they go below 80% charge, is there a guarantee I will receive a fully charged battery?

My boat mechanic is a optima dealer he told me a standard battery charger will never get the battery to full charge you need to get a optima charger. I had a battery that wouldn’t charge. I used the optima charger and it finally got a full charge.

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OPTIMA® Batteries D31M BLUETOP® Boat and RV Dual Purpose Sealed AGM Battery

Product ID: 7352946

Details

Battery Cell Composition
Lead Acid
Brand
OPTIMA
Item Weight
59.8 pounds
Product Dimensions
6.5"D x x
Size
12-13/16 x x
Terminal
SAE Terminal

⏳155 min Reserve Capacity

⚡SpiralCell Tech for max power

🔋900 Cold Cranking Amps

€ 1298.41

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Description

⚡ Power your adventures with OPTIMA® — where endurance meets instant ignition!

BUILT TO ENDURE - 15x more vibration resistant and up to 3x longer lifespan than standard flooded batteries—reliability that keeps pace with your adventures.
DUAL PURPOSE DYNAMO - Designed for both deep cycle and starting needs, perfect for high-demand marine and RV electrical systems.
UNSTOPPABLE POWER START - 900 CCA ensures your boat or RV fires up instantly, even in the coldest mornings.
MAINTENANCE FREE FREEDOM - Spillproof and mountable in any position, so you focus on the journey, not battery upkeep.
NEXT LEVEL SPIRAL CELL TECH - 99.99% pure lead spiral cells deliver cleaner, longer-lasting energy that outperforms flat-plate batteries.

The OPTIMA® D31M BLUETOP® is a 12-volt, dual-purpose AGM battery delivering 900 cold cranking amps and 155 minutes of reserve capacity. Featuring advanced SpiralCell technology with 99.99% pure lead, it offers superior starting power, exceptional vibration resistance, and up to three times longer life than standard flooded batteries. Maintenance-free and spillproof, it’s engineered for demanding boat and RV applications requiring reliable, long-lasting energy.

Specifications

ASIN	B00099DW6G
Automotive Fit Type	Vehicle Specific Fit
Battery Type	Lead Acid
Best Sellers Rank	#80,976 in Automotive ( See Top 100 in Automotive ) #280 in Automotive Replacement Batteries
Brand Name	OPTIMA
Compatible with Vehicle Type	Boat
Customer Reviews	4.2 4.2 out of 5 stars (455)
Global Trade Identification Number	00811405001611
Included Components	battery
Item Dimensions D x W x H	6.5"D x 12.81"W x 9.38"H
Item Highlight	High Performance Deep Cycle and Starting Battery, 900 CCA, Dual Terminal, Maintenance Free, Versatile Mounting
Item Type Name	lead_acid_battery
Item Weight	59.8 pounds
Manufacturer	OPTIMA
Manufacturer Part Number	8052161
Manufacturer Warranty Description	See manufacturer
Model Number	8052-161
Number of Items	1
Size	12-13/16 x 6-1/2 x 9-3/8 inch
Terminal	SAE Terminal
UPC	811405001611 721112819839
Unit Count	1 Count
Voltage	12 volts

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€ 1298.41

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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