Oral-B toothbrushes are certainly very popular and both my wife and I use them. However, as with many modern battery products, you’ll find that, after a while, they stop recharging quite so well. However, you can revive it rather than resorting to repair or replacement.
After your next recharge, run your toothbrush until it’s fully discharged – i.e. the head no longer moves when it is switched on. Once that’s happened, fully recharge it. Depending on your toothbrush model it should take between 14 and 22 hours to fully recharge – personally, I leave it charging for a full day, just to make sure.
You can do this to revive your existing brush, but Oral-B recommend doing this, as a matter of course, at least every 6 months.
It’s also worth noting too how long the brushes SHOULD last, as many of the older models (using older battery technology) lasted longer before needing a recharge – I’ve seen many people complaining that their new brushes “only” last a week, whereas this is normal. Based on brushing for 2 minutes, 2 times per day, it should run for between 5 and 12 days, depending on the model. The Pro 2000 and 3000 are the top sellers, and these will last 7 days between charges. In all cases, it’s best to consult the instructions that came with your model for specific details.