Bosch DC31 Marine Deep Cycle Battery – Reliable Power for Marine & RV Applications
The Bosch DC31 Marine Deep Cycle Battery is engineered to provide consistent, long-lasting power for all your marine and RV needs. Whether you're powering trolling motors, onboard electronics, or off-grid systems, this 12V, 100Ah battery ensures reliable performance even in the harshest conditions. Built with maintenance-free (MF) calcium technology, the Bosch DC31 excels in durability, vibration resistance, and corrosion protection, making it the ideal choice for long-term use in marine and RV applications.
Key Features:
-
Deep Cycle Performance: Specifically designed for repeated discharges and recharges, perfect for boats, RVs, and off-grid setups.
-
Maintenance-Free Technology: Thanks to advanced calcium technology, no need for regular fluid top-ups.
-
Superior Durability: Built to withstand vibration, extreme marine conditions, and corrosion.
-
Reliable Power: Ideal for powering trolling motors, onboard electronics, and other marine or RV appliances.
-
Fast Recharge: Ensures quick recovery, keeping you powered up for longer periods.
-
Trusted Bosch Quality: Engineered using Bosch’s advanced battery technology for outstanding longevity and reliability.
Technical Specifications:
-
Part Number: DC31
-
Model: Bosch DC31
-
Series: Marine Deep Cycle
-
Voltage: 12V
-
Capacity: 100Ah (20H)
-
Cold Cranking Amps (CCA): 625 CCA
-
Dimensions: 330mm (L) x 172mm (W) x 208mm (H)
-
Total Height: 234mm
-
Weight: 27kg
-
Terminal Type: MRN (Marine Terminal)
-
Battery Type: Maintenance-Free (MF) Calcium
Shipping Information:
-
Battery Shipping Restrictions: Batteries can only be shipped to Mainfreight Depots. Excludes Great Barrier Island, Chatham Island, and Waiheke Island.
-
Available Pick Up Locations:
-
Smart Marine Albany
-
Smart Marine Mt. Wellington
-
Smart Marine Manukau
-
Smart Marine Hamilton
-
Smart Marine Tauranga
-
Smart VIP Price Promise
Our prices are very Smart at Smart Marine! Our Smart VIP Membership and committment to great deals makes sure of that, but if you find a lower price, tell us- we will match it!*

Price Promise Terms & Conditions
- Excludes limited time specials, clearances, non-stocked products, overseas websites, price comparison websites and eBay/TradeMe.
- Applies to identical products, in stock in NZ with pricing valid at time of price match request and purchase, with evidence supplied.
- Excluded Products: clearance, run-out, distress, damaged/soiled, parallel imported, non-stocks, trade quotes, commercial quantities, credit account holders, insurance claims, services, typos, overseas websites, price comparison websites, auction websites.
- Free product, offers, sales and promotions cannot be redeemed with price matches.
- The price match applies to the total cost to buy including shipping, taxes and fees.
- Approved Price Promise Matches and purchases can only be redeemed with our store crew. Please contact your closest store with stock.
- Short term finance may not be available with some price matched purchases. Please enquire.