21V electric drill charger 16.8V electric drill battery 18650 charger charging line drag two

This connection charger is designed with one and two double charging ports. It can be charged with only one charging port alone or with two charging ports at the same time. During normal use, the voltage of the two batteries is different without affecting the charging effect.

The default output wire DC round hole is 5.5mm in outer diameter and 2.1mm in inner hole. If the jack size is special, please contact customer service for confirmation before purchase. The wrong size will not be used normally, thank you for your cooperation!