Which Battery is Best for the Bike? Dry Cell or Wet Cell

Motorcycle batteries come in two different types: dry cell and wet cell. The type you choose will depend on your needs, the age of your bike, and how much money you want to spend. Dry cells are more expensive but they last longer than wet cells. Wet cells are cheaper but can be dangerous if not treated correctly due to acid leaking out of them.

Either wet or dry, they generate power for starting the engine, lighting, and acting as a bridge between the charging system and all electrical appliances in the motorcycle.

Wet cell batteries

This type of battery is called a wet cell battery because it uses water(acid) as an electrolyte (the substance that allows electricity to flow through).

Wet motorcycle batteries have electrolytes and are labeled lower and upper acid levels. It is a rechargeable battery with dilute sulfuric acid but topped with water. Lead is used as an electrode, and sulfuric acid is used as the electrolyte. Plastic material is used to separate the contact between the electrode and electrolyte.

Wet batteries can either be primary or secondary. They are usually large, and the outer casing is translucent. A wet battery has cells where each cell has one opening at the top for filling electrolytes. Combinations of cells make a wet battery.

Types of the wet cell batteries

1. Flooded wet batteries

Flooded batteries are traditional battery types. As the name suggests, flooded wet batteries overflow when charging. This type of battery is usually used for engine starting and deep cycle designs. They work with a liquid acid electrolyte that moves around in the cell inside the battery.

In most cases, they are not sealed. Users have to add distilled water regularly as they dry out over time.

2. Sealed lead-acid (SLA) batteries

Sealed batteries have a partial opening for the emission of the gas though they have thick electrolytes inside. The dense electrolyte does not spill when recharging, and its design gives room for operation from any position. In addition, they have a low-pressure vent system that allows gas to escape at a particular condition and automatically reseal. SLA batteries are all rechargeable.

3. Valve Regulated Lead-Acid (VRLA) battery

VRLA is a wet battery with a regulated amount of electrolyte. Several lead cells are connected by wires in series, mounted to two lead plates, and suspended on the electrolyte.

It has a valve that regulates the electrolyte and the gas inside the battery regardless of the positioning. Excess gases during recharging escape through the valve to relieve the pressure build by oxidation and reduction processes.

  • 3-1 Absorbed Glass Mat (AGM) battery

AGM is a more advanced version of the VRLA battery. It is made up of fiberglass that is saturated in the electrolyte. AGM is unique from VRLA in that the fiber separates the electrolyte from the lead-acid plates, thus storing it in a suspended state free from the liquid.

  • 3-2 GEL battery

It is a vent-regulated lead-acid battery that produces a small amount of gas. The gel is formed by sulfuric acid, silica gas, and lead plates inside the container. The gas produced here recombines to create water used to top up the battery; hence, there is no need for extra topping. However, GEL batteries are prone to overcharging and can burst.

Dry cell motorcycle battery

It is called a “dry cell” battery because there’s no water in it at all.

A dry cell motorcycle battery stores electrical energy in a gel or paste-like substance enclosed in a plastic or metal container. The electrode is a metal or graphite rod covered by electrolyte gel enclosed in the same plastic or metal container. Most dry cell batteries are stored upright to avoid leaking and keep power for a long time.

  • Lithium-ion battery

It is a rechargeable battery that uses lithium ions to generate electricity. Inside the battery is positive and negative electrodes sandwiched in a plastic sheet separator submerged in an electrolyte.

The positive electrode is made of cobalt, while the negative is carbon. When charging, ions move from the positive electrode to the negative electrode and back during discharge.

Dry vs. Wet Batteries

Dry battery

Dry batteries are referred to as high performance because they have a high power-to-weight ratio. They are durable than wet though they are costly. As they are dry, they can be operated from any position without leakage.

Dry batteries can withstand high-temperature environments, thus suitable for touring. Additionally, they use non-corrosive plates, thus guaranteeing a long life.

Wet battery

A wet cell motorcycle battery is cheaper than a dry battery but lacks high-performance features for dry mortar. Also, wet batteries spill in case of misconduct but are available in a sealed maintenance-free version. They are the best choice for motorcycles used for touring purposes due to their weight.

Dry cell motorcycle battery pros and cons

Pros

  • Dry cell batteries have higher power to weight ratio hence high performance.
  • They are efficient due to their small size and weight.
  • As opposed to a wet battery, a dry cell battery has minimal chances of leakages.
  • A dry battery is an ideal backup for power to motorcycles because the electrolyte is installed inside the battery.
  • They can be stored for a longer time without the fear of discharge.
  • It starts working as soon as the electrolyte is installed because no initial charging is required.
  • Dry cells are recycled, thus saving the environment from degradation.
  • A dry battery has greater power to crank the motorcycle engine in case of cold weather.

Cons

  • If your motorcycle is old, a dry battery is not the choice for the replacement.
  • A dry cell battery is more expensive than a wet one due to its unique features.
  • Dry cell batteries can burst if exposed to extreme temperatures, thus posing a danger to the rider though the chances are minimal.
  • If a dry cell battery is incorrectly charged, it can be permanently damaged.
  • If mishandled, they can break and expose the electrolyte, which is corrosive.

Wet cell motorcycle battery pros and cons

Pros

  • The maintenance is easier because there is no need to install the electrolyte to operate.
  • The cost of a wet cell battery is lower than a dry cell battery.
  • Since the electrolyte is pre-installed, the maintenance of the battery is easier.
  • They are easily topped with electrolytes and regulate the gas emission by opening the caps.
  • In case of overcharging, the cells are not affected.
  • They are robust and are designed to withstand overcharge.
  • A wet motorcycle battery does not require a unique charging system; hence easy to charge.

Cons

  • In case of mishandling or accident, the electrolyte in the wet battery cell can leak.
  • If the electrolyte comes into contact with the skin, it causes corrosion and burns.
  • Oxidation and reduction cause the anode and cathode to wear out.
  • Thorough and regular cleaning is required to remove the sulfate deposits on the electrodes.
  • Due to the electrolyte inside, wet batteries tend to be heavier than dry cells.

Motorcycle battery maintenance

Battery maintenance is simply the measure that you should take to keep your battery healthy and in cases of malfunction. Motorcycle batteries will fail to work if the recommended guidelines are not followed. For weak batteries, use a trickle or taper charger to bring it back to life though it will take a whole day to charge fully.

Dry cell motorcycle battery

If you need to store your battery, fill each cell with distilled water and check after five minutes to top up again until the marked level is reached and do not overfill. Dry cells are not rechargeable but have a long shelf life; when put into use, fill in the electrolyte and charge up to the maximum. You don’t need to check the electrolyte level in the container regularly.

Wet cell motorcycle battery

Typically, a wet cell battery is used in an upright position to avoid the spilling of electrolytes. The electrolyte level needs to be topped regularly because a low level will result in performance. The installation of electrolyte should be done at the time of use; pre-installment will damage the cells.

Clean the electrodes regularly to remove the sulfate deposits, which prevent charging. Don’t expose the battery to high temperatures as it will cause overreaction and increase leakage.

Battery care tips

  • Use sandpaper to clean the battery terminals regularly to avoid corrosion.
  • Check your battery electrolyte level at least once a month.
  • Check for leakages after every long-distance ride.
  • If your battery is a flooded acid cell type, make sure it is topped with distilled water.
  • Ensure the terminals are tightly connected to the wires
  • Make sure your battery is tied tightly to avoid vibrations.
  • Buy a new battery if the original one freezes.
  • Ride your motorbike regularly.

Bottom line

Dry and wet cell batteries are all suitable for a motorcycle, but your choice will determine which one to buy. Consider the age, the nature of usage, operating environment, and the model of your bike.

In the market today, a sealed lead acid battery is best for all motorcycles. For battery replacement, use the one specified by the motorcycle manufacturer. Keep the battery electrodes clean because dirt on it will drain the charge as it acts as a conductor. When charging, keep watching to avoid overcharging as it leads to the gradual death of your battery.

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