Personally, if the Optima D31M BlueTop is connected to the electric system of the boat, RV, car, truck, or similar, let the onboard alternator keep the battery charged. Also, escaping gases are flammable - thus, always charge your batteries using voltage-regulated chargers! Note: don't overcharge SLA AGM/Gel Cell batteries - when safety valves open, excess hydrogen and oxygen escape the casing and they can't be replaced. Optima D31M is designed to be recharged using standard charging methods, for example using the alternator, battery charger, float charger, and similar.Īlso, it can be recharged quickly, to the maximum voltage of 15.6 volts, practically with no current limit, as long as the battery temperature stays below 125☏ (51.7☌).įor example, Optima D31M discharged down to 10.5 volts can be rapidly recharged to 90% of charge using:įast charging is very important for cycling applications, like in electric vehicles, trolling motor batteries, and similar. The nominal capacity (20h) of the battery is 75 Ah, with an RC (Reserve Capacity) value of 155 minutes.Īlso, its CCA (Cold Cranking Amps) rating is 900 Amps and its MCA (Marine Cranking Amps) rating is 1125 Amps. It features Dual SAE and 5/16 Stainless Stud terminals, allowing the battery to be used in both marine and automotive applications. Optima D31M is dual-purpose (hence the ' D'), BCI group 31 battery (hence the ' 31'), designed for marine (hence the ' M') applications. Six wound cell configuration utilize the so-called Optima's SpiralCell technology. Optima D31M Battery Frequently Asked Questions (FAQ)īattery plates are made out of high purity lead-tin alloy.Optima D31M BlueTop as Trolling Motor Battery.Optima D31M Features and Specifications.It is commonly used in single battery electrical systems found at RVs, boats, yachts, and even cars. It is a maintenance-free and spill-proof SLA (Sealed Lead-Acid) AGM (Absorbent Glass Mat) battery that can operate in virtually any position, featuring very good both starting and deep cycle performances. Optima 8052-161 D31M BlueTop Dual Purpose Marine Battery is a very popular starting and deep cycle battery for marine and automotive applications. Optima 8052-161 D31M BlueTop Dual Purpose Marine Battery

Optima batteries gel