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Batteries, battery systems, battery submodules, battery operational methods, battery system operational methods, battery charging methods, and battery system charging methods are described. According to one aspect, a battery includes a first battery terminal, a second battery terminal, and a plurali

Batteries, battery systems, battery submodules, battery operational methods, battery system operational methods, battery charging methods, and battery system charging methods are described. According to one aspect, a battery includes a first battery terminal, a second battery terminal, and 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, and switching circuitry configured to electrically couple one of the first and second battery terminals with one of the first and second submodule terminals 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 from the one of the first and second submodule terminals of the one of the submodules during a disengaged mode of operation of the one of the submodules.

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1. A battery comprising: a first battery terminal;a second battery terminal;a plurality of submodules individually comprising a plurality of rechargeable cells electrically coupled between the first and second battery terminals and wherein the rechargeable cells receive charging electrical energy fr

1. A battery comprising: a first battery terminal;a second battery terminal;a plurality of submodules individually comprising a plurality of rechargeable cells electrically coupled between the first and second battery terminals and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals;control circuitry configured to monitor the rechargeable cells of the submodules and to use the monitoring to control the application of different non-zero amounts of the charging electrical energy to the rechargeable cells of different ones of the submodules at a common moment in time; andwherein the at least one of the first and second battery terminals receives the charging electrical energy from a source which is external of the battery. 2. The battery of claim 1 wherein the control circuitry is configured to control the application of different non-zero amounts of the charging electrical energy to provide substantially balanced charging of the rechargeable cells of the different ones of the submodules. 3. The battery of claim 1 wherein the control circuitry is configured to control the application of different non-zero amounts of the charging electrical energy to provide the rechargeable cells of the different ones of the submodules with substantially the same state of charge during charging of the rechargeable cells of the submodules. 4. The battery of claim 1 wherein the control circuitry is configured to monitor an electrical characteristic of the rechargeable cells and to use the monitoring of the electrical characteristic of the rechargeable cells to control the application of different non-zero amounts of the charging electrical energy. 5. The battery of claim 4 wherein the control circuitry is configured to monitor voltage of the rechargeable cells. 6. The battery of claim 1 wherein the control circuitry is configured to control the application of different non-zero amounts of charging electrical energy having different amounts of current to the rechargeable cells of the different ones of the submodules to control the application of the charging electrical energy to the rechargeable cells of the submodules. 7. The battery of claim 1 wherein the control circuitry is configured to control the application of the charging electrical energy having an increased current to the rechargeable cells of one of the submodules compared to a non-zero current of the charging electrical energy applied to the rechargeable cells of another of the submodules. 8. The battery of claim 1 wherein the control circuitry is configured to control the application of the charging electrical energy having an increased current to the rechargeable cells of one of the submodules compared to the application of a non-zero current of the charging electrical energy to the rechargeable cells of another of the submodules responsive to the monitoring determining that the rechargeable cells of the one of the submodules are at a lower state of charge compared with the rechargeable cells of the another of the submodules. 9. The battery of claim 1 wherein the submodules individually comprise switching circuitry configured to electrically couple the rechargeable cells of the respective individual submodule to at least one of the first and second battery terminals. 10. The battery of claim 9 wherein the control circuitry is configured to control the switching circuitry of the submodules to control the application of different non-zero amounts of the charging electrical energy to the rechargeable cells of the different ones of the submodules. 11. The battery of claim 10 wherein the switching circuitry of an individual one of the submodules comprises a semiconductor switching device and the control circuitry is configured to bias the semiconductor switching devices of the submodules to different conductive states to control the application of different non-zero amounts of the charging electrical energy. 12. The battery of claim 9 wherein the control circuitry is configured to control the switching circuitry of one of the submodules to selectively electrically isolate the rechargeable cells of the one of the submodules from the at least one of the first and second battery terminals while the control circuitry is configured to control the switching circuitry of an other of the submodules to electrically couple the rechargeable cells of the other of the submodules to the first and second battery terminals. 13. The battery of claim 1 wherein the control circuitry is configured to monitor individual ones of the rechargeable cells of the submodules. 14. The battery of claim 1 wherein the control circuitry is configured to monitor all of the rechargeable cells of all of the submodules. 15. A battery operational method comprising: conducting electrical energy with respect to a plurality of rechargeable cells of a plurality of submodules of a battery during operations of respective individual ones of the submodules in an engaged mode of operation;changing one of the submodules to a disengaged mode of operation wherein electrical energy is not conducted with respect to the rechargeable cells of the one of the submodules; andoperating the one of the submodules in the disengaged mode of operation during the operations of others of the submodules in the engaged mode of operation, and wherein electrical energy is conducted with respect to the rechargeable cells of the others of the submodules during the operating of the one of the submodules in the disengaged mode of operation; andwherein the changing is responsive to a communication received from external of the battery. 16. The method of claim 15 wherein the conducting comprises conducting electrical energy using a terminal coupled with an external device, and the changing comprises electrically isolating the rechargeable cells of the one of the submodules from the terminal. 17. The method of claim 15 wherein the conducting comprises conducting electrical energy using a terminal coupled with an external device, and the changing comprises opening switching circuitry coupled between the rechargeable cells of the one of the submodules and the terminal. 18. The method of claim 15 wherein the conducting comprises conducting electrical energy using a terminal coupled with an external device and a plurality of switching circuits of respective ones of the submodules configured to selectively electrically couple the rechargeable cells of the respective submodules with the terminal, and wherein the changing comprises opening the switching circuitry of the one of the submodules to electrically isolate the rechargeable cells of the one of the submodules from the terminal. 19. The method of claim 15 wherein the conducting comprises receiving electrical energy using the rechargeable cells of the submodules during charging of the rechargeable cells. 20. The method of claim 15 wherein conducting comprises outputting electrical energy using the rechargeable cells of the submodules during discharging of the rechargeable cells. 21. The method of claim 15 further comprising: removing the one of the submodules in the disengaged mode of operation;after the removing, replacing the one of the submodules with a replacement submodule; andafter the replacing, providing the replacement submodule in the engaged mode of operation. 22. A battery operational method comprising: using switching circuitry of a plurality of submodules, electrically coupling a plurality of rechargeable cells of the submodules with a terminal which is coupled with an external device at a first moment in time;conducting electrical energy between the external device and the rechargeable cells of the submodules during the electrically coupling;electrically isolating the rechargeable cells of one of the submodules from the terminal at a second moment in time;monitoring the one of the submodules, and wherein the electrically isolating comprises electrically isolating responsive to the monitoring;biasing the switching circuitry of the submodules to different conductive states; andwherein the conducting comprises conducting different non-zero amounts of the electrical energy with respect to the rechargeable cells of the submodules as a result of the biasing. 23. The method of claim 22 wherein the electrically isolating comprises electrically isolating during the conducting of the electrical energy between the external device and the rechargeable cells of an other of the submodules. 24. The method of claim 22 wherein the electrically isolating comprises opening the switching circuitry of the one of the submodules. 25. The method of claim 22 wherein the conducting comprises receiving electrical energy using the rechargeable cells of the submodules during charging of the rechargeable cells. 26. The method of claim 22 wherein conducting comprises outputting electrical energy using the rechargeable cells of the submodules during discharging of the rechargeable cells. 27. The method of claim 22 wherein the electrically isolating comprises electrically isolating responsive to the monitoring detecting an alarm condition with respect to the one of the submodules. 28. The method of claim 27 wherein the detecting comprises detecting an electrical characteristic of at least one of the rechargeable cells of the one of the submodules triggering a threshold. 29. The method of claim 22 further comprising electrically isolating the one of the submodules from the terminal at a third moment in time responsive to an alarm condition being present external of the one of the submodules. 30. The method of claim 22 further comprising electrically isolating the one of the submodules from the terminal at a third moment in time responsive to communications received from external of the battery. 31. A battery comprising: a first battery terminal;a second battery terminal;a plurality of submodules individually comprising a plurality of rechargeable cells electrically coupled between the first and second battery terminals and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals;control circuitry configured to monitor the rechargeable cells of the submodules and to use the monitoring to control the application of different amounts of the charging electrical energy to the rechargeable cells of different ones of the submodules; andwherein the control circuitry is configured to control the application of the charging electrical energy having an increased current to the rechargeable cells of one of the submodules compared to a non-zero current of the charging electrical energy applied to the rechargeable cells of another of the submodules. 32. A battery comprising: a first battery terminal;a second battery terminal;a plurality of submodules individually comprising a plurality of rechargeable cells electrically coupled between the first and second battery terminals and wherein the rechargeable cells receive charging electrical energy from at least one of the first and second battery terminals;control circuitry configured to monitor the rechargeable cells of the submodules and to use the monitoring to control the application of different amounts of the charging electrical energy to the rechargeable cells of different ones of the submodules; andwherein the control circuitry is configured to control the application of the charging electrical energy having an increased current to the rechargeable cells of one of the submodules compared to the application of a non-zero current of the charging electrical energy to the rechargeable cells of another of the submodules responsive to the monitoring determining that the rechargeable cells of the one of the submodules are at a lower state of charge compared with the rechargeable cells of the another of the submodules. 33. The battery of claim 31 wherein the control circuitry is configured to control the application of the charging electrical energy having the increased current to the one submodule and to control the application of the non-zero current of the charging electrical energy to the another submodule at a common moment in time.