Deep Cycle BCI Group 31M Marine and Boat Batteries
12 Volt BCI Group 31M deep cycle batteries are specifically engineered for heavy charge/discharge cycling; perfect as a house battery or running a trolling motor, depth finder, live well pump, bilge pump, or fish locator.
Product Review
- 12 Month Free Replacement Warranty
- Designed for use in sump pumps, trolling motors, fish finders and more
- Deep cycle capacity 105AH
Brand: Duracell Ultra
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle
Cold Cranking Amps: 650
Product Review
- 30 Month Free Replacement Warranty
- AGM technology – spill proof, non-gassing and maintenance free
- Trusted Duracell Ultra brand
Brand: Duracell Ultra
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle
Cold Cranking Amps: 800
Product Review
- 48 Month Free Replacement Warranty
- 2 complete batteries in 1 - 100% starting and 100% reserve power to handle electronics
- AGM technology - non-spillable, non-gassing, and maintenance free
Brand: X2Power
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle, Dual Purpose (Starting/Cycling), Starting
Cold Cranking Amps: 1150
Product Review
- 12 Month Free Replacement Warranty
- Dual purpose provides both starting and accessory power
- Deep cycle capacity 100AH
Brand: Duracell Ultra
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle, Dual Purpose (Starting/Cycling), Starting
Cold Cranking Amps: 700
Product Review
- 24 Month Free Replacement Warranty
- Dual purpose power for starting and deep cycle use
- Spill proof, non-gassing and maintenance free
Brand: Optima
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle
Cold Cranking Amps: 900
Product Review
- 36 Month Free Replacement Warranty
- Non-spillable - mount in any position except inverted
- Faster recharge times vs flooded batteries to handle demanding accessory loads
Brand: Odyssey
Voltage: 12
Format: BCI Group 31M
Lead Acid Type: Deep Cycle, Dual Purpose (Starting/Cycling), Starting
Cold Cranking Amps: 1150
Don’t know what size battery you need?
There are standardized battery group sizes for marine applications. Match up your dimensions to select the right BCI Group size.
Use this quick guide to match up your battery–approximate maximum dimensions.
| Size | Length | Width | Height |
| 24M | 10-1/4" | 6-13/16" | 9-3/4" |
| 27M | 12-1/2" | 6-13/16" | 9-3/4" |
| 31M | 13" | 6-13/16" | 9-7/16" |
| 34M | 10-1/4" | 6-13/16" | 7-7/8" |
| 65 | 12-1/16" | 7-9/16" | 7-9/16" |
Additional size may be available – Contact your local store for more information.
Tips to extend the life of your Deep Cycle BCI Group 31M marine battery
- Off-season battery maintenance will provide extended run time and lifetime for your marine battery.
- Deep Cycle BCI Group 31M Marine and Boat batteries work best when the charge is maintained in the battery – do not store the battery in a discharged state. Use a top quality Marine Battery Charger
- We even offer battery boxes, Rescue Packs and portable power for running accessories, and custom cables to make sure your boat battery is running at top speed
Should I use a Sealed or Flooded battery? Sealed batteries have high energy density, low internal resistance, and are maintenance free, spill proof. Flooded batteries are reliable, power sources with outstanding cost to power ratio. Some flooded batteries can be “watered”, if needed. Your application and maintenance plan will help in proper battery selection.
Recycling
Batteries Plus Bulbs is also an industry leader for marine, boat deep cycle battery recycling. Each location is a drop-off point for battery recycling. Learn more about our recycling programs for consumers and businesses.
