KH-320 muscle fascial massager
Very cheap (~$15 retail) pistol-style massager. Disassembled because it is not charging anymore.
Rather heavy.
Back: pushbutton, power input, status LEDs.
Looks like Mabuchi RS-755 clone with 7.4V nominal voltage.
Battery pack (2x18650) in the handle.
Surprisingly low capacity battery pack - reason of failure.
No-name cells. No sign of any balancer. One of them was completely discharged (0V), second one had very high internal resistance when charging,
I've considered them too dangerous for further use.
Second point of failure: cracking plastic of the motor mount.
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