Is this the smallest battery in widespread use? - EDN
Panasonic Commercializes the Industry's Smallest Pin Shaped Lithium Ion Battery | Innovations/Technologies | Company | Blog Posts | Panasonic Newsroom Global
Types of Batteries: Sizes, How Long They Last, & Disposal
Dtp 301120 3.7V 40mAh Smallest Size Li Polymer Battery for Bluetooth Earphone Dtp-301120 - China 3.7V 40mAh Battery, 3.7V Battery | Made-in-China.com
Amazon.com: MNB 5 Rechargeable Battery 7 Charger Set AAAA 5 7 Small Replacement 1.5V Dry Lithium Battery (Size : B) : Health & Household
List of battery sizes - Wikipedia
Lithium Polymer Battery 3.7v 401540 200mah Rechargeable Small Size 500 Circle Times For Bluetooth Headset,Mp3,Mp4 - AliExpress
New Part Day: The Smallest Batteries You Have Ever Seen | Hackaday