What does a battery equalizer do?

Even between two identical batteries a voltage difference can occur over time.
This may be due to environmental influences, such as changed ambient temperature, or because the (required) capacity has changed.
Placing an equalizer between the battery charger and the batteries themselves eliminates the voltage difference between the batteries.
This significantly extends the life of the batteries.
With a battery equalizer, you are therefore assured of a reliable power supply for a longer period of time.

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