Comment by plorg

I can't say I like the 604 from looking at it, but that's a pretty surface level judgment and I'd have to use it to really compare. For my purposes a rechargeable mouse that lasts more than a day is fine because I'm using this at work and I just plug it in when I leave. Having a replaceable rechargeable battery also means if it starts running out of juice before one day I can just pop in a new battery and it'll be good for a couple more years.