Battery life really sucks. For me it's about a month whether I use Duracell pro, or the cheapest kirkland batteries.

My old MX-500 lasted about 3 or 4 months.

It really should have been designed to be used with a charging dock.

I still think its a great remote, but I think any normal person would consider it unacceptable because of the poor battery life.

Note: anyone who is a member of remote central is not likely considered to be normal ;)