— powered by 1 replaceable AA cell — ″finger″ battery / accumulator. Such elements are larger than the ″little finger″ AAA, but for full-sized mice this is usually not a problem. 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.
