A battery-powered percussive massage device comprising: a main housing having a main enclosure (112, 114) that encloses a piston; an applicator head (516; 700; 720; 740) removably coupled to the piston, at least a portion of the applicator head exposed outside the main housing; a battery assembly receiving enclosure extending from the main enclosure (112, 114); and a battery assembly positionable in the battery assembly receiving enclosure and removably secured to the battery assembly receiving enclosure such that a first portion of the battery assembly is positioned within the battery assembly receiving enclosure and a second portion of the battery assembly extends from the battery assembly receiving enclosure, wherein the battery assembly comprises a battery unit, characterised in that: the second portion of the battery assembly has an outer gripping surface configured to be gripped by one hand; the main housing encloses a motor and, in operation, the piston is caused to reciprocate along a longitudinal axis by the motor; the battery assembly further comprises a battery controller printed circuit board positioned within said second portion, the battery controller printed circuit board including an input jack to receive electrical charging power and a battery charger controller that controls said charging power received via said input jack to charge the battery unit; a plurality of light-emitting diodes (LEDs) is positioned around the periphery of said battery controller printed circuit board within the second portion of the battery assembly, said LEDs driven by said battery controller so that the colour of the LEDs indicates the charged state of the battery assembly; and a translucent plastic ring is aligned with the LEDs through which light from the LEDs is emitted so as to be seen externally of the second portion of the battery assembly. a main housing having a main enclosure (112, 114) that encloses a piston; an applicator head (516; 700; 720; 740) removably coupled to the piston, at least a portion of the applicator head exposed outside the main housing; a battery assembly receiving enclosure extending from the main enclosure (112, 114); and a battery assembly positionable in the battery assembly receiving enclosure and removably secured to the battery assembly receiving enclosure such that a first portion of the battery assembly is positioned within the battery assembly receiving enclosure and a second portion of the battery assembly extends from the battery assembly receiving enclosure, wherein the battery assembly comprises a battery unit, characterised in that: the second portion of the battery assembly has an outer gripping surface configured to be gripped by one hand; the main housing encloses a motor and, in operation, the piston is caused to reciprocate along a longitudinal axis by the motor; the battery assembly further comprises a battery controller printed circuit board positioned within said second portion, the battery controller printed circuit board including an input jack to receive electrical charging power and a battery charger controller that controls said charging power received via said input jack to charge the battery unit; a plurality of light-emitting diodes (LEDs) is positioned around the periphery of said battery controller printed circuit board within the second portion of the battery assembly, said LEDs driven by said battery controller so that the colour of the LEDs indicates the charged state of the battery assembly; and a translucent plastic ring is aligned with the LEDs through which light from the LEDs is emitted so as to be seen externally of the second portion of the battery assembly. the second portion of the battery assembly has an outer gripping surface configured to be gripped by one hand; the main housing encloses a motor and, in operation, the piston is caused to reciprocate along a longitudinal axis by the motor; the battery assembly further comprises a battery controller printed circuit board positioned within said second portion, the battery controller printed circuit board including an input jack to receive electrical charging power and a battery charger controller that controls said charging power received via said input jack to charge the battery unit; a plurality of light-emitting diodes (LEDs) is positioned around the periphery of said battery controller printed circuit board within the second portion of the battery assembly, said LEDs driven by said battery controller so that the colour of the LEDs indicates the charged state of the battery assembly; and a translucent plastic ring is aligned with the LEDs through which light from the LEDs is emitted so as to be seen externally of the second portion of the battery assembly.