My Braun toothbrush required constant recharging so I finally decided to replace the battery. I could not find the specs for the battery I was replacing and decided on a battery with what I felt were good specs, and a decent price. Of course the battery allowed longer time between charging, but I also noticed a bonus of more powerful oscillation!
While there are batteries that are "meant" for this toothbrush, this one is less expensive and has a similar or better capacity.
Amazon.com link for a single battery: https://amzn.to/3A3z5K2
Here is the 3 pack of batteries I ordered. (I have my wife's toothbrush to do as well)
https://www.amazon.ca/dp/B082DMGBGV?r...
Here is a single battery
https://www.amazon.ca/NiMH-Battery-Ta...