Amazon.com: Blomiky 2 Pack 3.7V USB Charger Cable with SM-2P Plug Connector for Small RC Amphibious Stunt RC Car Boat Trucks 3.7V Li-ion and Li-Polymer Battery 3.7V USB 2 : Toys &
2S Smart Li-ion, Polymer Battery Charger - Portable Power Technology
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
240W 10S li-ion 42V 5A 18650 lithium battery charger 36V electric bike li po battery charger for 10S rechargeable battery pack – LLT POWER ELECTRONIC