Great replacement!
I bought this from a link posted to a video on YouTube by a guy who showed how to replace the battery in the WaterPik rechargeable toothbrush, which is supposed to be non-replaceable. You do have to cut the old battery off the wires and solder this replacement on, but I had the tools to do it, and it works perfectly! Saved me the expense of buying a new sonic toothbrush to replace this one that I liked.
Rating: 5 stars