Power source for burst operation

A method of powering a device, the method comprising:

• providing a battery pack including:
• a housing configured to be removably connected to and supported by the device configured to receive power from the battery pack, wherein the housing includes a first housing portion and a second housing portion, and
• a plurality of first battery cells supported in the first housing portion, and
• a plurality of second battery cells supported in the second housing portion, wherein:
• the first housing portion is arranged perpendicular to the second housing portion,
• each one of the plurality of first battery cells has a first physical size and each one of the plurality of second battery cells has a second physical size different than the first physical size, and
• each one of the first battery cells is electrically connectable in parallel with a respective one of the second battery cells to form a plurality of parallel-connected combinations of battery cells of different physical size;
• and
• transferring, via a terminal of the battery pack configured to be electrically connected to the plurality of first battery cells and the plurality of second battery cells, the power from the plurality of first battery cells and the plurality of second battery cells to the device, wherein the plurality of parallel-connected combinations of battery cells of different physical size are electrically connectable in series to the terminal.

A battery pack comprising:

• a housing including a first housing portion and a second housing portion;
• a plurality of first battery cells supported in the first housing portion and
• a plurality of second battery cells supported in the second housing portion, wherein:
• the first housing portion is arranged perpendicular to the second housing portion,
• each one of the plurality of first battery cells has a first characteristic, and
• each one of the plurality of second battery cells has a second characteristic different than the first characteristic, the first characteristic and the second characteristic being at least one of a physical size, a shape, a chemistry, and an operational characteristic;
• and
• a terminal electrically connected to the plurality of first battery cells and the plurality of second battery cells including:
• each one of the first battery cells being electrically connectable in parallel with a respective one of the second battery cells to form a plurality of parallel-connected combinations of battery cells of different physical size, and
• the plurality of parallel-connected combinations of battery cells of different physical size being electrically connectable in series to the terminal.