Tips And Tricks On How To Charge Your Trolling Motor Battery

Different batteries serve different purposes, but battery technology can be confusing, and with the wide variety of battery types and options on the market, it can get very complicated to know which battery is best for a trolling motor. But how to charge a battery once you’ve chosen it is also extremely tricky.

Firstly: When receiving a new battery for a trolling motor, a supplemental charge is required to ensure that the battery is put into use in a spirited state, and the battery must be charged to ensure that it is full, otherwise it will damage the battery and affect its service life.

The second point is that you should not use a car battery to charge a trolling motor.

Car batteries may look great for trolling motors, but they are not! Car batteries and specialized trolling motor batteries look very similar and are both 12V systems, but their internal structure, the way they are powered and the way they handle deep discharges are completely different.

It’s true that all batteries perform the same basic tasks: storing power and delivering it when needed, but they are designed to do so in very different ways and for very different tasks. The reason a car battery can’t be used to charge a trolling motor is because the type of battery it uses just isn’t the same. Now let’s take a closer look at common battery types.

Starting battery is a kind of lithium-ion battery/lead-acid battery/nickel-metal hydride, nickel cadmium battery which is specially used for starting, lighting, ignition (abbreviated as SLI) and power supply of vehicles and aircrafts (abbreviated as SLIG after the 1980s). Generally refers to automobile batteries (automobile battery), or called car starter batteries. Mostly rated batteries have a rated capacity C of about 36 to 210 A-h, forming a series with a specific energy of 35 to 45 W-h/kg (based on 20h discharge rate energy).

Starter batteries are designed to produce high power for short periods of time to enable them to start an engine. They are well suited in cars and trucks, where the alternator can charge electronic devices such as lights, radios and air conditioners while they generate a continuous current. However, once the alternator fails, the low power begins to discharge the starter battery and you’ll soon notice your vehicle stalling. This is because starter batteries are not designed to provide a low charge for long periods of time. They can only start the engine and require the alternator to maintain a charge during extended use. Without constant charging from the alternator, they quickly discharge and become damaged.

Deep cycle batteries are designed to be essentially the opposite of starter batteries. Deep cycle batteries are those with a depth of discharge greater than 80%. Depth of discharge (DOD) refers to the percentage of rated capacity removed from the battery. Shallow cycle batteries should not be discharged deeper than 25%, while deep cycle batteries can release 80% of their charge. This is because battery life is affected by the average state of charge of the battery. Deep cycle batteries are designed to provide low levels of power for extended periods of time, and they can withstand very high levels of drain (down to 20% of their capacity) without damage. This makes them ideal for running electronic equipment such as fishfinders and electric trolling motors.

Dual-purpose batteries perform the basic tasks of a storage battery and provide the short-term power needed to start an engine, as well as the long-term low power needed for electronic equipment. The disadvantage of dual-purpose batteries, however, is that they are not as good as specialized starting batteries for starting engines, nor are they as good as specialized starting batteries for providing low power throughout the day. Typically, they can only withstand about 50% discharge without damage. These batteries are simply a compromise that allows anglers to accomplish both tasks with a single battery.

Marine batteries are sometimes used as a synonym for “deep cycle”, and marine batteries can be made up of any other type of battery, depending on their use. What happens when you use a car battery to power a trolling motor? Car batteries are usually starter batteries. They are designed to be used to start the engine and then live off of a constant charge from the alternator, as the car’s electronics need to be powered for long periods of time.

What happens when I use my car battery to power my trolling motor?

If you connect a car battery to a trolling motor, everything starts out fine. The trolling motor will start right up and run normally until the car battery starts to lose its charge. This happens very quickly and depending on the throttle setting you use, you will start to notice a drop in power within a few minutes. Depending on the total power draw, the battery will drain quickly and the engine will stop running. You are also likely to damage the car battery as it is not designed for deep discharging.If you want to power a trolling motor, you really need a deep cycle battery designed specifically for this use. Whether you fish from a kayak, a center console or a bass boat, a good deep cycle battery is an investment you won’t regret.So, never use a car battery to charge a trolling motor battery.

A trolling motor, also known as a trolling boat motor or boat engine, consists of a small boat propulsion system.Modern trolling motors use 12-volt, 24-volt and 36-volt brushed DC motors. Trolling boat motor batteries are usually 2 12V series batteries. This makes it difficult to charge multiple batteries with one charger. If you use a 24v charger in series to charge two batteries, they can become unbalanced over time, so the third point to keep in mind is how to quickly and easily charge a 24 volt system trolling motor battery.

For those who regularly use 24-volt trolling motors on their fishing boats, the trickiest question at the end of the day is how to charge the 24-volt system. Typically, these small electric trolling motors are connected to two 12-volt automotive or marine batteries. These batteries are connected in series to provide 24 volts to the electric outboard motor. A simple way to charge the batteries is to use a specialized charge controller that can deliver 24 volts to both batteries or 12 volts to each battery.

The original specialized chargers are well matched and have moderate charge multipliers to prevent damage to the internal structure of the batteries caused by overcurrent charging. Using a “fast charger” is convenient but can damage the battery faster than standard charging.

The last point is also very important but often overlooked. Trolling motor batteries should be charged as soon as possible after they are depleted, preferably within 24 hours. Better yet, batteries need to be charged promptly before they are fully depleted. Over-discharge will lead to accelerated polar plate sulfation, and the low efficiency of the battery pack is due to frequent high-current discharge. The depth of discharge will affect the service life of the battery, and the deeper the discharge depth of the battery, the number of cycles will be reduced. When the battery discharge depth reaches the limit, not only to prevent the long time light load discharge triggered by the battery depth discharge, but also to prevent the battery from short-circuit discharge, otherwise it will cause serious damage to the battery’s re-charging capacity and storage capacity, shorten the service life of the battery.

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