Overview Brand : WEIZE Product Dimensions : 6.81"D x 12.99"W x 8.35"H Number Of Cells : 1 Terminal : DT, SAE/M8 Stud, SAE/M8 Threaded Post, WNT Manufacturer : WEIZE Vehicle Service Type Boat, Marine, RV : Voltage 12 Volts (DC) : Vehicle Service Type Boat, Marine, RV : Voltage 12 Volts (DC) Battery Cell Composition Lead-Acid, AGM : Item Weight 67.47 Pounds : Battery Cell Composition Lead-Acid, AGM : Item Weight 67.47 Pounds About this item [DUAL PURPOSE]: The WEIZE BCI Group 31M is a dual purpose deep cycle sealed AGM marine and RV battery. It features an outstanding starting power and deep cycling capability for long-lasting power supply. Terminal: Left : Positive (+)-Red, Right: Negative (-)-Black. [HIGH PERFORMANCE]: Powered by advanced AGM technology, the WEIZE BCI Group 31M has a low internal resistance and high output power, offering a reliable power supply and a long battery life, 2x more cycle life than traditional flooded marine batteries. [QUICK CHARGE]: The WEIZE BCI Group 31M features quick charging, which allows it to charge up to five times faster, saving time and increasing efficiency. Please use a constant voltage of 14.4± 0.1V and a max current of 21A to charge the battery until the current has no change for 2 to 3 hours, But the maximum charging time must not exceed 24 hours. [LOW MAINTENANCE]: Being almost maintenance-free, the WEIZE BCI Group 31M reduces surface corrosion, proves more durable, and performs well against vibrations, has 20x more vibration resistance than flooded batteries. [SAFETY]: With a leak proof design and the presence of specialized valves, the WEIZE BCI Group 31M battery is very safe to use, ensuring a longer battery life. WEIZE dual-purpose Batteries are confidently guaranteed for 2 years! We aim for quality followed up with quality customer service, Amazon doesn't deal with the return of battery-related products, so please contact the seller directly. Weize support team is on standby for YOU.