https://www.amazon.com/dp/B07Y8FMB4F/ref=cm_sw_r_awdo_navT_g_ZRWQG6SE6C7E40KR28YH
Been going strong for over a year.. Battery hasn't degraded and plenty strong enough
I bought one of the Renpho models. Renpho Percussion Massager
I have had it for a few months and so far it works great and holds a charge a long time.