Rechargeable electric shavers are great to use. Cordless men's and women's electric shavers have batteries that may need to be replaced from time to time.
Some popular brands of electric shavers are:
To replace the battery on most electric shavers, you will have to disassemble the razor, probably de-solder the old battery and solder in the new battery. If you don't have a soldering iron or don't want to do the work, you can take the new, replacement battery and shaver to a local shop.