As for the battery life ... Other features include a brush head replacement reminder and a pressure sensor. The Philips Sonicare 4100 is a rechargeable electric toothbrush that lasts for two ...

I was impressed by the Philips Sonicare Diamondclean 9900 Prestige’s long lasting battery life. After its first initial charge, it lasted for several weeks and the brush beeped at the end of use ...