Optima Batteries D27M BlueTop and D27F YellowTop As Starting Batteries Since both D27M and D27F can provide 2 Amps for 33+ hours easily, they are a very good choice as fish finder batteries for situations where the main boat engine is going to be offline for hours.Īnd if the boat has solar panels and a wind turbine installed, such a setup can power a fish finder, navigational lights, and a few more devices almost indefinitely. Most onboard fish finders require less than 2 Amps when operating at full power. Optima Batteries D27M BlueTop and D27F YellowTop As Fish Finder Batteries However, stronger motors requiring 50 Amps or more, drain these batteries too fast, and getting larger, deep cycle batteries for such applications is recommended. Optima Batteries D27M BlueTop and D27F YellowTop are very good choices as electric trolling motor batteries for smaller electric trolling motors.īoth batteries are able to provide 25 Amps for 140 minutes (2 hours and 20 minutes) - that is 58.33 Ah effectively, which is a good result for 66 Ah batteries. Optima Batteries D27M BlueTop and D27F YellowTop As Trolling Batteries If your boat or vehicle has a dual battery system (one dedicated starting battery, another battery, or battery pack as a dedicated deep cycle battery), then consider getting batteries that are optimized for such purpose - personally, both Optima D27F and D27M can be used as compact and relatively lightweight starting batteries, and for a deep cycle battery pack, go for lithium batteries. With boats, yachts, cars, trucks, and similar vehicles having so many electronic devices that are slowly draining the main battery while the main engine is turned off, having a good and reliable dual purpose battery is becoming more and more important. ![]() Optima Batteries D27M BlueTop and D27F YellowTop are intended for marine and automotive applications where they can be used as starting batteries and at the same time are able to provide power for electric and electronic devices like lights, onboard computers, GPS units, alarms, and similar. However, they provide much more cranking amps than deep cycle batteries and feature longer RC than starting batteries.Īlso, they tolerate 300+ discharge/recharge cycles, especially when charged with Optima Digital chargers. Since these are dual-purpose batteries, they provide fewer cranking amps than true starting batteries and feature shorter RC than true deep cycle batteries. The nominal capacity and reserve capacities of these two batteries are the same - 66 Ah and 140 minutes. Note: Amazon links in the table open in the new windows, feel free to check them for the most up-to-date offers and prices.Īs one can see, the Optima D27F YellowTop battery is a slightly lighter battery, features 'only' SAE posts and is capable of providing slightly more CCA and MCA Amps. Their specifications are given in the following table: Model Optima Batteries D27M BlueTop is dual purpose battery intended for marine applications and D27F YellowTop is dual purpose battery intended for automotive applications. However, they also differ in a few important details. ![]() Their nominal capacity is 66 Ah (20h capacity), with a reserve capacity (RC) of 140 minutes. Optima Batteries D27M BlueTop and D27F YellowTop are BCI Group 27 batteries. Optima Batteries D27M BlueTop and D27F YellowTop - Features and Specifications Optima Batteries D27M BlueTop and D27F YellowTop are completely spill-proof 12V AGM batteries, mountable in virtually any position. Optima Batteries D27M BlueTop and D27F YellowTop are AGM (Absorbent Glass Mat) SLA (Sealed Lead Acid) batteries, with the spiral wound lead plates, offering good vibration resistance, extended life, low maintenance, and faster recharging. Optima Batteries D27M BlueTop and D27F YellowTop Starting and Deep Cycle Batteries are versatile, dual-purpose marine and automotive batteries. Optima Batteries D27M BlueTop and D27F YellowTop Starting and Deep Cycle Batteries
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