Personal care device with removable energy source

A personal care device having an energy source arranged for being removable, the personal care device comprising:

• an outer housing having a detachable closure element at one end, the detachable closure element enabling access to a cavity of the outer housing after detachment;
• a chassis disposed in the cavity of the outer housing, the chassis holding the energy source;
• the energy source having a first electrical connector non-permanently coupled with a first electrical connector partner and a second electrical connector non-permanently coupled with a second electrical connector partner, the first electrical connector partner and the second electrical connector partner being secured at the chassis;
• the chassis being arranged for removal from the cavity of the outer housing when the closure element is detached, and the energy source being arranged for removal from the chassis in an energy source removal direction perpendicular to a chassis removal direction along which the chassis can be removed from the cavity of the outer housing;
• the first electrical connector having a first geometry and the second electrical connector having a second geometry being different to the first geometry and the first electrical connector partner being adapted for the geometry of the first electrical connector and the second electrical connector partner being adapted for the geometry of the second electrical connector so that the energy source has only one correct insertion alignment providing a mistake-proof insertion.