A non-volatile memory device including multi-level cells is provided. The drill bit also includes a first cutter disposed on the center member and a second cutter disposed on the outer member, wherein the first speed and second speeds are configured to control a resultant side force of the drill bit. Such an approach may provide performance enhancements as the power consumed by various components of the computing system may be reduced. In the hybrid pack, the battery protection IC and the fuel cell controller mutually transfer at least remaining battery power information indicative of the amount of power remaining in the battery and fuel cell status information indicative of a status of the fuel cell, to each other via a bus.