Shortly after buying my Macally BTMouseJr, I raved about how great it was. Now, after 3 million batteries, I'm not so thrilled. Brand new, top-quality batteries get sucked dry by this little gizmo after only a few days of regular use. The cheap batteries last only two days. I'm definitely planning on buying some rechargeable batteries so I can afford to continue using the thing, but if I had known what an energy guzzler it was, I may not have bought it. ALSO: When using it with my Apple BT keyboard, the cursor jumps around the screen like a flea on crack. Has anyone found a BT mouse that they really like?