I have a similar mouse/keyboard with an M310 mouse. It's two years old
on the original battery.

Bluetooth mice use lots of power compared to other wireless mice. I've
tried three or four different brands, battery life is less than a few
months, maximum. And some bluetooth mice are horrible in other ways,
failing to connect if the computer is slept and resumed. The one I like
best is a Motorola OEM Bluetooth mouse. Motorola denies their existence
but available on eBay.

Bob

On Mon, Jun 29, 2015, at 09:45 AM, Denny Esterline wrote:
> My work computer has a wireless keyboard/mouse. I had some questions
> about
> the battery life as well, so I took to writing the install date on the
> batteries...
> The one in my mouse was installed on 4/14/15 and shows no sign of dying
> at
> the moment. (Single Duracell AA alkaline cell) From memory, the last one
> gave up at about five months.
> (and I spend a good part of my day in a CAD package that is all mouse
> work)
>=20
> If I had a mouse that consumed a battery in a single day - It'd be in the
> scrap bin.
>=20
> (Logitech M210 if you care)
>=20
> -Denny

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