Review on 🪥 Oral-B Pro-Health Clinical Battery Power Electric Toothbrush: Enhanced Oral Care with Colorful Variations by Ramon Parra

Insert batteries. However, there are small "+” and "-” symbols on the handle to show which way the batteries should be inserted. I have attached a photo showing these symbols and the batteries installed. You can also use a black marker to draw "+” and "-” next to it for better identification of the next battery change. I have a rechargeable model and wanted to buy a 220V charger for use abroad. However, the charger alone cost $20, so it was cheaper to buy this battery model. Also, I no longer have to take a charger with me. It spins a bit slower than a rechargeable one, but still works a lot better than manual brushing. I've only been using it for a week, so I can't comment on the battery life. The battery cover is easy to remove and put back on. This may change with more frequent use, as mentioned by others. Just in case, I'll add petroleum jelly to the o-rings.