Review (5/5): Just like the more expensive rechargeable version
When I first got this I thought it was going to be a weak version of its rechargeable cousin but boy I was wrong! Performs just like the more expensive rechargeable and without needed a charging base sitting out on the counter. I bought this wanting something I could travel with. The only thing missing in my opinion is a travel case. I also have the rechargeable version although I haven't checked to see if the case that came with that will work with this unit.
The replacement brush heads for the rechargeable unit work interchangeably with this one so that's a bonus. I did take note of what other reviewers said about the battery compartment allowing water to leak in so each time I change batteries I take a cheap lip balm and rub it over the rubber o-ring for a better seal.
In my experience a fresh set of alkalines last well over two months with daily use. I haven't tried rechargeable batteries but suspect they won't last as long due to the lower voltage.