18500 li-ion Battery 3.7V 1400Mah ICR18500 Lithium Rechargeable Battery for LED Flashlights 6pcs(They are not 18 * 65mm Size Battery Also not aa Size Battery) : Amazon.ca: Health & Personal Care
Arlo Certified: Tenergy 3.7V Arlo Battery Fast Charger and 650mAh RCR123A Li-ion Rechargeable Batteries for Arlo Wireless Security Cameras (VMC3030/3200/3330/3430/3530), UL UN Certified, 4-Pack - Walmart.com
Lithium Ion Polymer Battery Ideal For Feathers - 3.7V 400mAh : ID 3898 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits