| CPC H01M 50/244 (2021.01) [B25F 5/00 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 10/46 (2013.01); H01M 50/204 (2021.01); H01M 50/247 (2021.01); H02J 7/0013 (2013.01); H02J 7/0045 (2013.01); A01G 20/47 (2018.02); H01M 2220/30 (2013.01)] | 17 Claims |

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1. A system for use with a power tool having a power tool battery receptacle, the system comprising:
a device configured to be wearable by a user, the device having a first device battery receptacle and a second device battery receptacle; and
an adaptor connected to the device and including a user interface and an adapter interface, the adapter interface configured to be received by the power tool battery receptacle, the adaptor configured to:
supply power, via the first device battery receptacle, when the user interface is in a first mode; and
supply power, via the second device battery receptacle, when the user interface is in a second mode.
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