The PHILIPS HC3420 is a hair clipper equipped with a Ni-MH battery that can be charged in 8 hours. This is a used item. It works without any problems. Although there may be some battery degradation, it was still usable for about 5 minutes after a full charge. - Brand: PHILIPS - Model: HC3420 - Battery Type: Ni-MH - Charging Time: 8 hours - Voltage: 15V - Power Consumption: 5.4W Thank you for looking.