Logitech G7 mouse battery replacement?

[Kaizer]

So I bought my G7 mouse shortly after they were released. Im a fairly heavy user.. I dont know if its me.. or being paranoid.. but it seems the battery life has gotten shorter and shorter as time goes on. On a weekend when I was playing some life/soul sucking games id have to change the battery twice. Is there any aftermarket batteries for the G7 that might have a little more capacity? I dont care if they are heavier or not.. or if there is a good place to just get standard replacements. Perhaps this is my paranoia's way of telling me to buy the next new mouse they put out

 

[mr saturn]

I'm having the exact same thing happening to me. I think the only thing we can do is order new ones from Logitech. I heard they ran about 7 bucks each.