I am using a Microsoft wireless optical mouse.
Its around 6 mouths old. It uses two AA batteries.

The battery uses are quite fast. So I switch to rechargeable batteries.
I have to buy two sets to switch and recharge every 2 weeks.
Is this quick battery consumption normal?

My friends has other brand wireless optical mouse. They claim only use dry
cell batteries and last 6 months or longer.

Can you tell me what your experiences are (mouse brand and made, battery
size and length of use)? Thank you.