A battery comprising: a first battery terminal; a second battery terminal; a plurality of submodules individually comprising: a first submodule terminal; a second submodule terminal; a plurality of rechargeable cells electrically coupled between the first and second submodule terminals (17, 18) and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals (13, 14); and switching circuitry configured to electrically couple one of the first and second battery terminals (13, 14) with one of the first and second submodule terminals (17, 18) of one of the submodules during an engaged mode of operation of the one of the submodules and to electrically isolate the one of the first and second battery terminals (13, 14) from the one of the first and second submodule terminals (17, 18) of the one of the submodules during a disengaged mode of operation of the one of the submodules; wherein plural ones of the submodules are configured to operate in the engaged mode of operation at a common moment in time wherein one of the first and second submodule terminals (17, 18) of each of the plural ones of the submodules is electrically coupled with the one of the first and second battery terminals to discharge electrical energy to a load which is electrically coupled with the first and second battery terminals (13, 14); the battery being characterized by further comprising a control circuitry configured to control the switching circuitry of the submodules to provide different currents of the charging electrical energy to different ones of the submodules at another common moment in time to attempt to balance charging of the rechargeable cells of the different ones of the submodules. a first battery terminal; a second battery terminal; a plurality of submodules individually comprising: a first submodule terminal; a second submodule terminal; a plurality of rechargeable cells electrically coupled between the first and second submodule terminals (17, 18) and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals (13, 14); and switching circuitry configured to electrically couple one of the first and second battery terminals (13, 14) with one of the first and second submodule terminals (17, 18) of one of the submodules during an engaged mode of operation of the one of the submodules and to electrically isolate the one of the first and second battery terminals (13, 14) from the one of the first and second submodule terminals (17, 18) of the one of the submodules during a disengaged mode of operation of the one of the submodules; a first submodule terminal; a second submodule terminal; a plurality of rechargeable cells electrically coupled between the first and second submodule terminals (17, 18) and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals (13, 14); and switching circuitry configured to electrically couple one of the first and second battery terminals (13, 14) with one of the first and second submodule terminals (17, 18) of one of the submodules during an engaged mode of operation of the one of the submodules and to electrically isolate the one of the first and second battery terminals (13, 14) from the one of the first and second submodule terminals (17, 18) of the one of the submodules during a disengaged mode of operation of the one of the submodules; wherein plural ones of the submodules are configured to operate in the engaged mode of operation at a common moment in time wherein one of the first and second submodule terminals (17, 18) of each of the plural ones of the submodules is electrically coupled with the one of the first and second battery terminals to discharge electrical energy to a load which is electrically coupled with the first and second battery terminals (13, 14); the battery being characterized by further comprising a control circuitry configured to control the switching circuitry of the submodules to provide different currents of the charging electrical energy to different ones of the submodules at another common moment in time to attempt to balance charging of the rechargeable cells of the different ones of the submodules.