ELECTRIC WORK MACHINE

An electric work machine allows use of batteries with different sizes with battery covers and allows easy maintenance of a damaged battery cover. A rechargeable concrete vibrator includes a motor, a motor housing accommodating the motor, a battery holder connected to the motor housing to receive a battery in a detachable manner, and a battery cover to cover an overall part of the battery held by the battery holder. The battery cover is attachable to and detachable from the battery holder.