AA batteries and accumulators, due to their size, are very popular, commonly used sources of energy, utilized in everyday devices. However, in the market, one can find not only basic alkaline cells or NiMH batteries. In this article, we will describe less common variants that have specific propertie ...

Unfortunately, not always. The answer to this question is not straightforward, as the simplest testers or chargers can only measure mAh from the charging process. If our charger does not have a dedicated discharging (load) or testing function, its mAh measurement will never be equivalent to the actu ...

The problem is complex, and the answer is of interest to both users and sellers who are dealing with complaints submitted by their customers. We will try to help all interested parties on this topic. ...

When choosing rechargeable batteries, the main criterion for our customers is capacity, possibly brand, and of course price. It has become established that the higher the capacity of such a battery, the better. Such batteries are also clearly more expensive than potentially weaker/less capacious cou ...

New users of chargers may have doubts when their new, advanced Ni-MH battery charger (popular AA batteries) is supposed to charge 4 batteries at 1A, while it is equipped with a power supply rated at 1A. After all, 4 batteries charged at 1A require a total of 4A of current, right? ...

On the Internet, we can find a large number of tests of batteries and accumulators. Practically every few weeks we can come across a new news item, video, or mention of further tests. Often, the winner of one ranking performs very average or even poorly in other tests. What causes such a large discr ...

When we buy a battery with a capacity of 2600 mAh and a specified number of charge cycles of 500, we are convinced that with occasional use, we will be able to enjoy its maximum performance for many years. The stated capacity values and the number of charge cycles are often treated as guaranteed and ...

Batteries and accumulators everActive are subjected to periodic laboratory tests. In 2022, another test was conducted by a certified research unit - Intertek Semko AB. Intertek Semko AB, located in Sweden, is an elite laboratory engaged in, among other things, testing batteries and accumulators. It ...

Just like last year, we decided to test suspicious batteries described as Eneloop Pro, offered through the largest shopping platform in Poland. The price – really "bargain" – over 30% lower compared to current prices from official distribution – what could go wrong ;) ? Last year (2021) we alread ...

Do you remember our test from a year ago, where we tested "occasionally" purchased Eneloop batteries? The products turned out to be counterfeit, with performance about 25-40% worse than the originals available in our warehouse. We are supplementing our test with a self-discharge test – measuring cap ...

The capacity of a battery/accumulator expressed in milliampere-hours (mAh) is the main indicator by which most of us compare individual batteries or accumulators. Unfortunately, in many cases, it is not an ideal unit for assessing the performance of a given power source, especially for disposable ba ...

It often happens that when analyzing the technical data of a battery we are interested in, we see, for example, 2 different capacity values expressed in milliampere-hours - mAh. Where do these differences come from? What is typical capacity, minimum, maximum, nominal, rated? ...

Have you ever experienced that newly installed batteries or charged rechargeable batteries show no signs of life? The compartment where the batteries were installed started to melt, or perhaps there was a battery leak in the power chamber of your device? In this article, we explain what to pay atten ...

Currently, there is a surge of various chargers on the market that, according to the manufacturer's assurances, allow for measuring the mAh capacity of our batteries. But is that really the case? In our article, we describe the most common traps, doubts, and mistakes made by users when measuring the ...

We point out common simple mistakes that ultimately lead to faster wear of rechargeable batteries. Have you ever experienced that new, branded rechargeable batteries last much shorter than they should? Read our guide, and you may avoid later disappointment. ...

Ni-MH rechargeable batteries cause much more problems when assessing the current state of charge than alkaline or Li-ion batteries.While in the case of typical disposable batteries or Li-ion rechargeable batteries, we can orientate the level of charge of the cells and their condition based on the vo ...

As you know from our other publications, 1.2V Ni-MH batteries, in particular the typical R6 (AA) and R03 (AAA) batteries, function very well in most devices, being an ecological and economically justified replacement for disposable 1.5V batteries. On a daily basis, we use devices that tolerate worki ...

The problem with alkaline batteries is that in devices with high power consumption, they are very often inefficient and discharge quickly (the voltage drops very quickly) and need to be replaced frequently. Ni-MH batteries, on the other hand, are ideal for devices with high power consumption. Unfort ...

We present a practical guide that will allow you to get to know Ni-MH rechargeable batteries better. We recommend reading it to both beginners and advanced users.Have you ever had a fresh battery pack that doesn't want to charge when you take it out of the device, or maybe the charging turns off alm ...

More and more users, following the trend of eco-friendly solutions, are opting to replace disposable batteries, especially the so-called "AA/AAA" batteries, with rechargeable batteries that can be charged multiple times. We buy branded, high-capacity Ni-MH rechargeable batteries, invest in a goo ...