| CPC H02J 7/0042 (2013.01) [F02N 11/0862 (2013.01); F02N 11/0866 (2013.01); F02N 11/087 (2013.01); F02N 11/12 (2013.01); F02N 11/14 (2013.01); G02B 6/26 (2013.01); H01M 10/0525 (2013.01); H01M 10/4207 (2013.01); H01M 10/425 (2013.01); H01M 10/44 (2013.01); H01M 10/46 (2013.01); H01M 50/204 (2021.01); H01M 50/296 (2021.01); H01M 50/531 (2021.01); H01M 50/543 (2021.01); H02J 1/00 (2013.01); H02J 1/122 (2020.01); H02J 7/00032 (2020.01); H02J 7/00047 (2020.01); H02J 7/0024 (2013.01); H02J 7/0029 (2013.01); H02J 7/0031 (2013.01); H02J 7/0034 (2013.01); H02J 7/0045 (2013.01); H02J 7/0047 (2013.01); H02J 7/342 (2020.01); B60S 5/00 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01); H01M 2220/30 (2013.01); H02J 7/00 (2013.01); H02J 7/00302 (2020.01); H02J 7/00304 (2020.01); H02J 2310/46 (2020.01)] | 20 Claims |

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1. A rechargeable battery jump starting device having an electrical optical position sensing switch system, the device comprising:
a first battery;
a second battery;
an electrical control switch electrically connected to the first battery and second battery, the electrical control switch having a parallel switch position for connecting the first battery and second battery in parallel, the electrical control switch having a series switch position for connecting the first battery and second battery in series;
a microcontroller unit electrically connected to the electrical control switch; and
an optical coupler electrically connected to the electrical control switch, the optical coupler providing a signal to the microcontroller for indicating the position of the electrical control switch.
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