Battery packs containing configurable terminal holder

A battery pack, comprising:

• a housing;
• two or more battery cells located in the housing, the two or more battery cells interconnected by a configurable connector which is configured to enable electrical connections between the two or more battery cells, the configurable connector comprising a plurality of first electrical terminals connected to a control circuit board of the two or more battery cells, at least one metal clip connected to the control circuit board, and a terminal holder removably couplable to the housing;
• and
• a first latch mechanism adapted to lock the terminal holder on the housing, the first latch mechanism comprising a fixed end pivotally coupled to the housing, a moveable end opposite the fixed end, and an arm extending between the fixed end and the moveable end;
• wherein, the terminal holder is adapted to be installed to the housing in a first orientation at which the two or more battery cells are electrically connected, or in a second orientation at which the two or more battery cells are not electrically connected;
• and
• wherein the terminal holder comprises a plurality of second electrical terminals configured to be removably connected to the plurality of the first electrical terminals and a metal plate configured to be removably connected to the at least one metal clip, one of the plurality of the second electrical terminals always engaging with a same one of the plurality of the first electrical terminals when the terminal holder is installed to the housing in the first orientation or the second orientation.