Difference Between NiMH And mAh Batteries

Comparisons, Knowledgebase

Last Updated on November 25, 2022 by mdmtool


Many different types of batteries are available on the market today, and each has its own set of advantages and disadvantages. NiMH and mAh batteries are two of the most popular batteries.

What Is NiMH Battery?

what is nimh

Nickel-metal hydride (NiMH) batteries are the most popular type of AA battery. A NiMH battery is a type of rechargeable battery that uses nickel and metal hydride (MH) materials as electrodes. The positive electrode is typically made from nickel oxide hydroxide, and the electrolyte is usually an aqueous potassium hydroxide solution.

What Is mAh Battery?

Mah Batteries

mAh is milliamp hour and is a way to measure how much charge a battery can hold. A mAh battery is a primary battery that uses manganese dioxide and zinc as electrodes.

Difference Between NiMH And mAh Batteries


Work Principle: The chemical reaction between the materials in NiMH batteries produces the electrical energy that can be used to power electronic devices, while the reaction between the materials in mAH batteries produces heat instead of electrical energy.

Capacity: NiMH batteries have higher power than mAh batteries .

See Also:  Difference Between PVC And SVC

Rechargeability: Both batteries are rechargeable.

Environmentally Friendly: NiMH batteries are better for the environment than mAh batteries.

Operating Temperature: NiMH batteries can operate at higher temperatures than mAh batteries.

Efficiency: NiMH batteries are more efficient than mAh batteries.

Lifespan: NiMH batteries tend to last longer than mAh batteries.

Safety: NiMH batteries are safer than mAh batteries.

Current Rating:  The current rating of a battery is the maximum amount of current it can safely deliver. NiMH batteries have a higher current rating than mAh batteries.

Energy Density: The energy density of a battery is the amount of energy it can store in a given volume. mAH batteries have a higher energy density than NiMH batteries.

Self-Discharge: NiMH batteries have a lower self-discharge rate than mAh batteries. The self discharge rate is the percentage of charge that a battery loses over time when not in use. 

Memory Effect: The memory effect is a phenomenon that can reduce the capacity of a battery over time if it is not fully discharged before being recharged. NiMH batteries do not suffer from the memory effect.

Pricing: NiMH batteries are more expensive than mAh batteries.

Uses: NiMH batteries are widely used in a variety of electronic devices, while mAh batteries are primarily used in small electronic devices.

what is mAH batteries


How mAh Dictates A Battery’s Timing?

The mAH number dictates how long a discharge current can be drawn from the battery. A higher mAH means the batteries can provide power for a more extended period without needing to be recharged. This is why many people choose high mAH batteries for devices that require long run times, like digital cameras.

How Do I Know If I Have mAh Battery?

If you’re not sure if your battery is mAH or not, simply look at the label. The mAH will be listed on the label, usually in milliamp hours (mAh).

See Also:  Difference Between Dc Motor And Dc Generator

How Fast Does A NiMH Battery Charge?

The charging time of a NiMH battery depends on the battery’s capacity and charger. A higher-capacity battery will take longer to charge than a lower-capacity battery.

Can I Use A NiMH Battery In My Digital Camera?

Yes, you can use a NiMH battery in your digital camera. NiMH batteries are ideal for digital cameras because they have a high capacity and can be recharged multiple times.

What Is mAh’s Current Rating?

The mAH (milliamp-hour) rating measures a battery’s capacity. The higher the mAH rating, the longer the battery will last. For example, a 3000 mAH AA battery will last three times as long as a 1000 mAH AA battery.

Should I Use Higher Or Lower mAh?

The higher the mAh, the longer the battery will last. So if you need a battery that will last longer, you should use one with a higher mAh.

How Does The Capacity Of A Battery Affect Its Performance?

The capacity of a battery affects its performance in two ways: run time and charge time. A higher-capacity battery will have a longer run time and take longer to charge than a lower-capacity battery.

Does NiMH Battery Have Memory?

NiMH batteries do not have memory.

Can I Use A Higher-Rated mAh Battery In My Electronic Device?

Yes, you can use a higher-rated mAH battery in your electronic device.

Do NiMH Batteries Lose Capacity Over Time?

Yes, NiMH batteries do lose capacity over time. However, they will continue to work even when they are not at total capacity.

How Can I Extend The Life Of My NiMH Batteries?

There are a few things you can do to extend the life of your NiMH batteries:

  • Store them in a cool, dry place.
  • Charge them regularly.
  • Do not expose them to extreme temperatures.
  • Do not overcharge them.
  • Do not discharge them entirely.

How Long Can A Rechargeable Battery Last?

A rechargeable battery can last several years if properly cared for. However, the exact lifespan of a battery will depend on many factors, including how often it is used and how well it is maintained.


Both NiMH and mAH batteries have their pros and cons, so it’s important to choose the right one for your needs. Whichever you choose, be sure to read the labels and follow the proper care instructions to extend the life of your batteries.

Leave a Comment


A website that provides helpful guides and solutions for tools. We aim to provide the most comprehensive and up-to-date information, so that you can make the best decisions for your selecting the right tools for your business.

Tool Categories


Measuring Tools


Our Moto

At MdmTool.com, we believe that everyone should have access to the best tools available. Whether you're a professional tradesman or a DIY enthusiast, we want to help you find the right tools for the job.

More questions? Get in touch