Lithium Ion Polymer Battery - 3.7v 500mAh : ID 1578 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
18650 Liion Battery Charger Li-Ion Batteries Charging EU US Plug 3.7V Mini Baterie Chargers Free Shipping
Amazon.com: PKCELL ICR18500 Battery 3.7V 1400mah Li-Ion Rechargeable with Button Top 6PC(They are not 1865mm Batteries Also Not AA Size Battery) : Health & Household
Nabíjecí baterie Li-Ion 18650, 6800 mAh Minimální objednatelné množství 3ks - FAJNshop.com