A battery holder containing positive temperature coefficient (PTC) resetable fuse to electronically limit the maximum current that can be drawn from circuits built using reusable electronic component housings. A power supply with similar housing to reusable battery holders, also designed to limit maximum current and perform electrically equivalent to two or more battery holders. A reusable electronic housing with means for attaching any two leaded electronic component for insertion into quick connect assembly system. This housing also contains a positive temperature coefficient (PTC) resetable fuse to electroniclly limit the maximum current that can be sent through the attached two leaded component.