Lithium Ion Battery - 1Ah - PRT-13813 - SparkFun Electronics
Amazon.com: HXJNLDC DC 3.7V 5000mAh 955565 li-ion Lithium Ion Polymer Battery Replacement for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Electronics
Amazon.com: HOOVO 7.4V 80C 6200mAh 2S Lipo Battery Hard Case with Tracxas Plug for RC Car Truck Truggy Buggy Tank RC Airplane Helicopter Boat Car Racing (2 Pack) : Toys & Games
Li-polymer Battery HAT for Raspberry Pi, SW6106 Power Bank Solution, with Embedded Protection Circuits