Amazon.com: ICR17500 Battery 3.7V 1100mah A Size Lithium Rechargeable Batteries with Flat Top 2pcs(They are not 1865mm Size Battery) : Health & Household
ShtokCustomWorx - Gathered best batteries for sabers of all sizes in one chart. Remember: "mAh" is a battery capacity (how long it will run, bigger number - better), "A" is a max
A Diagram of All the Batteries | FlowingData
Island Hopper 55-lb replacement battery (rechargeable)