A surgical instrument (10; 40; 100), comprising: a jaw assembly, comprising: a staple cartridge including a plurality of staples; and an anvil, wherein at least one of the staple cartridge and the anvil is movable relative to the other one of the staple cartridge and the anvil to capture tissue therebetween; a firing assembly configured to deploy the plurality of staples into the captured tissue during a firing sequence; and a handle, comprising: an electric motor operably coupled to the firing assembly, wherein the electric motor is configured to generate at least one rotational motion to motivate the firing assembly to deploy the plurality of staples into the captured tissue during the firing sequence; and a power pack (12; 42) separably couplable to the handle, wherein the power pack comprises: a plurality of rechargeable battery cells configured to power the electric motor; at least one battery-cell health indicator (22, 24, 26); and an electronic control circuit configured to assess whether a subset of the plurality of rechargeable battery cells is damaged during the firing sequence based on at least one measurement performed by the at least one battery-cell health indicator, wherein the electronic control circuit is configured to employ a voltage convertor to step up an output voltage of the power pack during the firing sequence in response to a determination that a subset of the plurality of rechargeable battery cells is damaged. a jaw assembly, comprising: a staple cartridge including a plurality of staples; and an anvil, wherein at least one of the staple cartridge and the anvil is movable relative to the other one of the staple cartridge and the anvil to capture tissue therebetween; a staple cartridge including a plurality of staples; and an anvil, wherein at least one of the staple cartridge and the anvil is movable relative to the other one of the staple cartridge and the anvil to capture tissue therebetween; a firing assembly configured to deploy the plurality of staples into the captured tissue during a firing sequence; and a handle, comprising: an electric motor operably coupled to the firing assembly, wherein the electric motor is configured to generate at least one rotational motion to motivate the firing assembly to deploy the plurality of staples into the captured tissue during the firing sequence; and a power pack (12; 42) separably couplable to the handle, wherein the power pack comprises: a plurality of rechargeable battery cells configured to power the electric motor; at least one battery-cell health indicator (22, 24, 26); and an electronic control circuit configured to assess whether a subset of the plurality of rechargeable battery cells is damaged during the firing sequence based on at least one measurement performed by the at least one battery-cell health indicator, wherein the electronic control circuit is configured to employ a voltage convertor to step up an output voltage of the power pack during the firing sequence in response to a determination that a subset of the plurality of rechargeable battery cells is damaged. an electric motor operably coupled to the firing assembly, wherein the electric motor is configured to generate at least one rotational motion to motivate the firing assembly to deploy the plurality of staples into the captured tissue during the firing sequence; and a power pack (12; 42) separably couplable to the handle, wherein the power pack comprises: a plurality of rechargeable battery cells configured to power the electric motor; at least one battery-cell health indicator (22, 24, 26); and an electronic control circuit configured to assess whether a subset of the plurality of rechargeable battery cells is damaged during the firing sequence based on at least one measurement performed by the at least one battery-cell health indicator, wherein the electronic control circuit is configured to employ a voltage convertor to step up an output voltage of the power pack during the firing sequence in response to a determination that a subset of the plurality of rechargeable battery cells is damaged. a plurality of rechargeable battery cells configured to power the electric motor; at least one battery-cell health indicator (22, 24, 26); and an electronic control circuit configured to assess whether a subset of the plurality of rechargeable battery cells is damaged during the firing sequence based on at least one measurement performed by the at least one battery-cell health indicator, wherein the electronic control circuit is configured to employ a voltage convertor to step up an output voltage of the power pack during the firing sequence in response to a determination that a subset of the plurality of rechargeable battery cells is damaged.