4/3 A 3.7 Volt Lithium Ion 18500 Battery (1600 mAh) - Only Batteries
Power-Xtra 3.7V Li-ion 18500 1500 Mah Rechargeable Battery - Power Xtra
ICR18500 Rechargeable Li-ion Battery with Flat Top 1400mAh 3.7V 18500 Battery for LED Torch Falshlight 2pcs 18 * 50mm : Amazon.ca: Health & Personal Care
3.7v LI-ION battery. 18500 – Carter Direct South Africa