Lithium Ion Polymer Battery with Short Cable - 3.7V 420mAh : ID 4236 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Buy Wholesale China Lifepo4 12v 20ah 240wh Lithium Ion Battery Pack In Flat Shape For Solar Street Light & 12v 20ah Lithium Ion Battery at USD 69.8 | Global Sources
12pk (2 x 6pk) Excelltec Lithium Batteries | 4 x CR2032 Batteries | 4 x CR2025
2 Pcs Keeppower Flat Top 18350 10A Discharge IMR 1200mAh 3.7V High Drain Li-ion Rechargeable Lithium Battery UH1835P : Amazon.ca: Health & Personal Care
Prismatic Cell and Pouch Batteries - Lithium Ion Battery Applications
Modifying Flat-Topped Li-ion Cells to Fit Into Battery Holders - Instructables