--- product_id: 657304041 title: "Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A)" brand: "interstate batteries" price: "R18277" currency: ZAR in_stock: true reviews_count: 8 category: "Interstate Batteries" url: https://www.desertcart.co.za/products/657304041-interstate-batteries-marine-rv-battery-12v-100ah-825cca-dual-purpose store_origin: ZA region: South Africa --- # 925 Cold Cranking Amps (CCA) 2-3X Longer Battery Life 100Ah Dual-Purpose Capacity Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) **Brand:** interstate batteries **Price:** R18277 **Availability:** ✅ In Stock ## Summary > ⚡ Power your adventures with confidence—never get left behind! ## Quick Answers - **What is this?** Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) by interstate batteries - **How much does it cost?** R18277 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/657304041-interstate-batteries-marine-rv-battery-12v-100ah-825cca-dual-purpose) ## Best For - interstate batteries enthusiasts ## Why This Product - Trusted interstate batteries brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged & Ready:** Built 'Interstate tough' to withstand harsh marine and RV conditions. - • **Unmatched Longevity:** Experience 2-3X longer life than conventional AGM and flooded batteries. - • **Eco-Conscious Choice:** Join the movement—recycle your battery at any Interstate All Battery Center. - • **Dual-Purpose Powerhouse:** Start your engine and run accessories seamlessly with one battery. - • **Extreme Deep-Cycle Performance:** Thick plates deliver reliable power for extended trips without losing charge. ## Overview The Interstate Batteries 31M-AGM is a 12V, 100Ah pure lead AGM battery designed for marine and RV use. Delivering 925 CCA, it combines high-cranking power with extreme deep-cycle capability, offering 2-3 times longer life than conventional batteries. Built tough for rugged conditions and fully rechargeable, it supports both starting and accessory power needs while promoting eco-friendly recycling. ## Description Buy Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A): Batteries - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Perfect battery for the boat - High quality battery that has never left me stranded. Even after leaving my boat moored for an extended period of time, cranked over with all the expected power. I guess the best compliment to the battery is after installing it, I never had to think about it again. Review: Good battery - Great battery!!!!! ## Features - DUAL PURPOSE MARINE RV BATTERY: Interstate's marine dual-purpose AGM battery can serve as both your cranking battery to start the motor & power your trolling motor - whether the motor is on or off! Built "Interstate tough" to withstand the most rugged conditions so you can spend more time having fun & less time worrying about your battery - 2X-3X MORE BATTERY LIFE: This pure, non-alloy lead battery puts the most advanced battery technology on your side. The expected service life lasts 2x longer than conventional alloy AGM batteries & 3x that of a conventional flooded battery. With faster recharging & more overall life than a conventional alloy AGM battery, this battery stays ready for your fishing weekends - EXTREME DEEP-CYCLE POWER: This 2-in-1 pure lead AGM battery delivers high-cranking, extreme deep cycle power. It's designed to provide reliable force over an extended period to power your boat's motor & all its accessories (lights, televisions, appliances, water pumps & more). Not all marine batteries are the same - & this one exceeds the rest. Built with thick plates so the battery continuously discharges power so you can recharge it many times over - without decreasing its lifespan. To ensure you don’t lose power while on your next trip, our batteries have been thoroughly tested & provide Outrageously Dependable benefits to boat & RV owners - MOST TRUSTWORTHY POWER SOURCE: For 70 years, Interstate Batteries purpose has been to deliver the most Outrageously Dependable source of power to the world. Our customers come first, so we strive to create a positive experience for all. We recycle more batteries than we sell; please return to an Interstate All Battery Center near you so we can continue recycling ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BHTT7K4J | | Battery Type | Sealed Lead Acid | | Best Sellers Rank | #13,054 in Automotive ( See Top 100 in Automotive ) #47 in Automotive Replacement Batteries | | Brand Name | Interstate Batteries | | Compatible with Vehicle Type | Trailer | | Customer Reviews | 4.7 4.7 out of 5 stars (37) | | Item Weight | 64.5 Pounds | | Manufacturer | Interstate Batteries | | Manufacturer Part Number | 8-31MAGMDC | | Manufacturer Warranty Description | 2 Year Manufacturer | | Size | Group 31M | | Terminal | Marine Terminal | | Voltage | 12 Volts | ## Product Details - **Battery Cell Composition:** Sealed Lead Acid - **Brand:** Interstate Batteries - **Item Weight:** 64.5 Pounds - **Manufacturer:** Interstate Batteries - **Size:** Group 31M - **Terminal:** Marine Terminal - **Vehicle Service Type:** Trailer - **Voltage:** 12 Volts ## Images ![Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) - Image 1](https://m.media-amazon.com/images/I/81qlj86yulL.jpg) ![Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) - Image 2](https://m.media-amazon.com/images/I/81CcdRmULJL.jpg) ![Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) - Image 3](https://m.media-amazon.com/images/I/61H1pK0s4yL.jpg) ![Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) - Image 4](https://m.media-amazon.com/images/I/61oZ9fkjrfL.jpg) ![Interstate Batteries Marine/RV Battery 12V 100Ah 825CCA Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's (8-31MAGMDC / 31M-AGM-A) - Image 5](https://m.media-amazon.com/images/I/81TSbktZApL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect battery for the boat *by E***N on April 22, 2026* High quality battery that has never left me stranded. Even after leaving my boat moored for an extended period of time, cranked over with all the expected power. I guess the best compliment to the battery is after installing it, I never had to think about it again. ### ⭐⭐⭐⭐⭐ Good battery *by S***H on April 2, 2026* Great battery!!!!! ### ⭐⭐⭐⭐⭐ Solid Dual-Battery Backup Setup — Reliable Power for Sump Pump and Essentials *by M***N on March 23, 2026* After 12+ years, I finally replaced my sump pump backup battery setup and upgraded it properly — and I’m really glad I did. I was debating one expensive battery ( also group 31) ..but bought 2 of these for less than the cost of one. I’m running a 3/4 HP sump pump with about 7 ft of vertical head, and the discharge line slopes downward after that. So the pump isn’t under extreme load, but reliability during outages is critical for me. I paired two Group 31 AGM batteries (in parallel) with my Tripp Lite APS750 inverter/charger, and the difference is noticeable right away. Startup is smooth, voltage stays stable, and I now have significantly more runtime during outages. For wiring, I connected the batteries positive-to-positive and negative-to-negative, and then connected the inverter across the two batteries (positive on one battery and negative on the other). This helps balance the load and ensures both batteries are used evenly. A nice bonus is that I’m also able to keep my modem and WiFi running off the same setup during a power failure, which makes a big difference during storms. A few things I learned that might help others: - Don’t rely on an old battery just because it hasn’t been used much — mine was over 10 years old and definitely due for replacement. - Adding a second battery in parallel is a much better upgrade than buying a single expensive “premium” battery. - Use proper short, thick cables and connect the batteries cleanly — it really matters for performance. - Test the system after setup by simulating a power outage. Overall, this setup gives me a lot more confidence heading into heavy rain or storm season. Simple upgrade, but a huge improvement in peace of mind. ## Frequently Bought Together - Interstate Batteries Marine/RV Battery 12V 100Ah 925CCA (31M-AGM) Dual Purpose Power Pure Lead AGM RV & Marine Starting Replacement Battery (Group Size 31M) Boats, RV's - NOCO BT31S Group 31 Heavy-Duty Battery Tray for Marine, RV, Camper and Trailer Batteries --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/657304041-interstate-batteries-marine-rv-battery-12v-100ah-825cca-dual-purpose](https://www.desertcart.co.za/products/657304041-interstate-batteries-marine-rv-battery-12v-100ah-825cca-dual-purpose) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-04-25*