We have recently gotten ourselves some SURI toothbrushes and they are eco friendly, repairable, the heads are recyclable/ biodegradable. They also give a better clean than my old oral b electric. Quieter too. Highly recommend.
I have the cheapest oral-b (bought for under 20 euros about a decade ago) and it uses AA-batteries, a pair of rechargeable ikea 1900mah batteries last for about 100 cumulative minutes of usage.
Yup, you need to send it back to them but for a few quid (or included if you have their replacement head subscription) they will change the battery for you.