— powered by 2 replaceable AA batteries — ″AA″ batteries / accumulators. Such batteries take up quite a lot of space by the standards of computer mice, so this option is typical mainly for high-end full-size models in which high power and battery capacity are more important than small dimensions and weight. All replaceable elements are convenient due to, in fact, the possibility of replacement — models of standard sizes AA and AAA are sold everywhere, and the process itself takes a minimum of time. In addition, the user has the choice between disposable batteries and rechargeable batteries; the former are cheaper, but require replacement when discharged, the latter can be recharged, but the battery and charger are quite expensive.
