This is the only mouse I have found that has a rechargeable option. I don't like throwing away batteries, so this is great. I just plug it into the laptop with provided charge cord when batteries flat, and it can still be used as it is charging. Can't seem to get these instore anymore (in Australia at any rate) so I ordered two online from USA (I think they are refurbished but look like new with bag and booklet and all). They are meant for older operating systems, but work perfectly with my Win 8 laptop. Sad when really good products disappear, Targus!!