Amazon.com: 2 Pcs 3.7V Rechargeable Batteries 1/2AA Lithium ion Battery icr14250 300mAh (Flat Top, 0.57 * 0.98inch, Shorter Than AA and AAA : Health & Household
Amazon.com: Taken 18500 Rechargeable Batteries, IMR 18500 1500mAh 3.7V Li-ion Rechargeable Battery with Button Top - 4 Pack : Health & Household
Amazon.com: ICR17500 Battery 3.7V 1100mah A Size Lithium Rechargeable Batteries with Flat Top 2pcs(They are not 1865mm Size Battery) : Health & Household