In this buyer’s guide, our experts will guide you through the universe of rechargeable NiMH batteries. By the end, you’ll be able to shop for and use your batteries like pro.
Advantages of rechargeable batteries
Depending on the model and brand you choose, a rechargeable battery can last between 5 and 10 years (or until you’ve ran out of cycles) and can be recharged up to 2,000 times. Now that’s what we call a good investment!
Buying rechargeable batteries has never been so affordable: not only do they last for years, but the prices are much lower than they were in the past.
Did you know that it’s easier to recycle rechargeable batteries than alkaline single-use batteries? Also, they’re often made from recycled materials.
Cycles & capacity: what you need to know
Before comparing different rechargeable batteries, it’s important to understand the difference between a battery’s capacity and the number of cycles it can do. Here’s a quick summary that will help you make an informed decision:
Capacity VS cycles
Generally speaking, the higher the capacity of the battery, the lower the number of cycles it will do. Manufacturers have therefore created different battery recipes to find the perfect balance between capacity, cycles and budget.
How many cycles do I need?
Here’s an example of how to calculate the number of cycles you’ll need for your device in relation to the amount of times you recharge your battery:
*7 years: average lifespan of a battery.
Recharge your batteries before using them
If you power your device with a 2,000 mAh battery that’s discharged down to 50% of its capacity (1000 mAh) and a second battery that’s fully charged (2000 mAh), your device won’t make the most of the 2000 mAh available. It will be limited by the weakest battery. Charge both batteries fully to get the most out of them.
Same brand, same model
Different brands often use different types of technology.
We therefore suggest that you group batteries from the same brand and model together to ensure they perform at their very best.
For maximal power, combine batteries that have the same power (mAh) together.
If you use an Eneloop 2000 mAh battery and an Eneloop 2550 mAh at the same time, the Eneloop Pro will be less powerful than expected.
The old with the old and the new with the new
As batteries get older, their capacity decreases. To get the most out of your batteries, use a combination or either old batteries or new batteries. Avoid combining both types together.
You can trust us
You can find a wide variety of rechargeable batteries on the market, all with different price tags. Unfortunately though, certain manufacturers oversell the performance of their products by claiming that they have more capacity or cycles than they really do.
At Batteries Expert, we work closely with our suppliers to ensure that our products do what they say on the tin.
For example: you purchase a battery that offers 2400 mAh of capacity, only to find that it really has 1900 mAh, or that it loses its capacity after 1 year.