Best replacement battery for toothbrush

Ni-Cd vs Ni-Mh BatteryEven though some toothbrushes can work well on different batteries, it is always best to replace your old battery with one of similar capacity and chemistry. With that being said, you can replace mpst Ni-Cd batteries with Ni-Mh ones that usually have larger capacity. They do tent to yield more power, meaning, your toothbrush will work longer, but it will also take longer to fully recharge it. Keep in mind that your charging indicator could provide yo with misleading data as it is designed to use Ni-Cd battery wit a lower capacity.