Improve 40mAh 301020 3.7V Flat Square Smallest Lithium Polymer Ion Battery Cells Pack Ion for Bluetooth Headset with PCB and Connector - China 400mAh Li Polymer Battery and 301020 Lithium Battery price | Made-in-China.com
Trustfire 18650 3.7V 3400mAh Li-ion Battery C-W PCB Flat Top
Battery Pack 3.6V, 40 mAh, Ni-MH, 2P, PCB mount
vhbw Ni-MH Battery 3.6 V 40 mAh) 2 Pins PCB End for Model Making, Solar Lights, Telephone, etc. as 3/V40H: Amazon.de: Electronics & Photo