There are a few types of battery testers. The most popular and widespread is a simple ammeter. It measures the charge speed of the accumulator. More intricate equipment allows conducting various tests with a more in-depth inspection of an accumulator. Such tests include short circuit tests, temperature tests, failsafe tests, overcharge and overdischarge, and so on, but the main types are cycle, load, and electromagnetic compatibility evaluations. Cycle tests include a continuous charge-discharge procedure to evaluate the lifespan of a battery. These tests can have a noticeable negative effect on accumulators, so they are performed only in the testing environment. Load evaluations establish the power level a battery can produce. These tests determine if a battery is compatible with a target device. Electromagnetic compatibility is needed to discover whether the power element has any electromagnetic influence that can cause bad performance or damage the device.