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
Amazon.com: Replacement Battery for Compex 4H-AA1500 941210, Compex Mi Mi-Sport MI-Fitness Runner Enegry Mi-Ready Vitality PerformanceE Mi-Ready FIT Sport Elite Enegry Edge US Performance US : Cell Phones & Accessories
Battery suitable for Compex Mi Sport 500 - 1800 mAh 7.2 V battery (Green) - BatteryUpgrade
Cameron Sino 1800mah Battery For Compex Mi Fitness Trainer,mi Sport 500, theta-stim,theta-pro,mi Theta Pro,sport 3 Vascular - Digital Batteries - AliExpress
Cs Battery For Compex Mi Sport/performance/enegry/elite/edge Us,vitality,voor Fit Sp 1.0/2.0/3.0/4.0,physio 5,theta 400/500/600 - Digital Batteries - AliExpress