Custom-Made 3.7V 400mAh Polymer Battery 503030 Lipo Battery Pack for Speaker/ Music Player/ Earphone - China Lithium Polymer Battery, Lipo Battery 503030 | Made-in-China.com
Amazon.com: KBT 3.7V 400mAh Li-Polymer Battery: 303040 Rechargeable Lithium-ion Batteries Replacement with 2.0 JST Connector for Car Dash Video Recorder, Digital Camera, Electric Toys, Headlamp, GPS Devices : Health & Household
H31 Battery With Usb Charger ( Input 5v ) X4 H107 H31 Spare Parts 3.7v 400mah Lipo Battery 3.7 V 400 Mah 30c 752035 - Parts & Accs - AliExpress
Amazon.com: Liter 3.7V 400mAh 602626 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST 2.0mm Connector : Electronics
Lithium Ion Battery - 400mAh - PRT-13851 - SparkFun Electronics
Lithium Ion Battery - 400mAh - PRT-13851 - SparkFun Electronics
BESTHUA Solar Power Bank | 2W 5V Portable Charger 400mah | Battery Backup Charger Solar Panel, Compatible for Cell Phones, Tablets, and Electronic Devices - Walmart.com