I recently had to replace the handle of my Oral B electric toothbrush with a built-in sealed battery. The battery got to the point where it couldn't hold a char

I recently had to replace the handle of my Oral B electric toothbrush with a built-in sealed battery. The battery got to the point where it couldn't hold a charge for at least two brushings without it noticeably having its power output diminished. I bought that brush handle in 2009. 15 years of life, and if I didn't mind about the second brush charge I probably could have squeezed another year or two out of it.