Amazon.com: Otech Battery Compatible for COMPEX MI-Theta PRO : Cell Phones & Accessories
Mi-Sensor for Customised Sessions | Compex International
Cameron Sino 2000mah Battery 4h-aa1500, 941210 For Compex Mi, Mi-fitness, Mi-sport, Performance Mi-ready, Performance Us - Digital Batteries - AliExpress
Compex Mi-Fitness
Amazon.com: Replacement Battery for Compex Mi, Mi-Sport, Enegry,MI-Fitness,Runner, Theta 500,Physio 5,FIT,SP 2.0,fits Part No Compex 941210 4H-AA1500, 4.8V Ni-MH 2000mAh/9.6Wh : Health & Household