Amazon.com: 2 Pcs 3.7V Rechargeable 1/2AA Lithium ion Battery icr14250 300mAh (14.5 * 25mm, NOT AA or AAA) : Health & Household
Li-Polymer Battery 3.7V 1500mAh
Amazon.com: ICR18500 Battery 3.7V 1400mah Li-Ion Rechargeable with Flat Top 6PC(They are not 1865mm Batteries Also Not AA Size Battery) : Health & Household