Question about Panasonic Er-1611

Rechargeable AAA batteries are installed. The information given by the other commentators is wrong. You can replace them very easily (and then choose a different brand of batteries if they don't suit you). Nominal 50 h per battery charge

Exactly this battery is worth nothing. The device is not used for 4 weeks and it is already almost discharged. Also only a very short operating time with NON-DAILY USE (!) Adjustment wheel for the cutting length is fiddly and difficult to operate.predecessor was smoother and better.

Battery is not replaceable.

Ni-MH...Google is your friend and next time please ask the question more specifically ;-)