![Amazon.com: 300 Watt Bicycle Generator 3/8" Belt Drive Pedal Power Pulley Dynamo : Patio, Lawn & Garden Amazon.com: 300 Watt Bicycle Generator 3/8" Belt Drive Pedal Power Pulley Dynamo : Patio, Lawn & Garden](https://m.media-amazon.com/images/I/51lP0v12JnL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 300 Watt Bicycle Generator 3/8" Belt Drive Pedal Power Pulley Dynamo : Patio, Lawn & Garden
![Amazon.com: Pedal Power Bicycle Generator Emergency Backup Power System 500 Watts 12 Volts, 24 Volts, 48 Volts Direct Current Lead Acid Battery Charging System : Patio, Lawn & Garden Amazon.com: Pedal Power Bicycle Generator Emergency Backup Power System 500 Watts 12 Volts, 24 Volts, 48 Volts Direct Current Lead Acid Battery Charging System : Patio, Lawn & Garden](https://m.media-amazon.com/images/I/41f1iOK88OL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingTHREE%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA6%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Amazon.com: Pedal Power Bicycle Generator Emergency Backup Power System 500 Watts 12 Volts, 24 Volts, 48 Volts Direct Current Lead Acid Battery Charging System : Patio, Lawn & Garden
![Just added an extra battery. Remember to check polarity of wire before connecting! Just found out Chinese bike occasionally reverse the polarity of the pin. To force people to buy "authentic" battery Just added an extra battery. Remember to check polarity of wire before connecting! Just found out Chinese bike occasionally reverse the polarity of the pin. To force people to buy "authentic" battery](https://i.redd.it/zudfi3t0xjz71.jpg)