Gratulujem. Podla vyrobcuMyš fungovala bezproblémov 2 roky
http://logitech-en-amr.custhelp.com/app/answers/de tail/a_id/12131/~/m305-battery-life-information
> Battery Information:
> Requires 1 AA alkaline battery.
> Expected battery life is up to 4 months.
Vydrzi baterka styri mesiace.