Size 1= US plug Size 2= EU plug (Good News! We have updated the charger and it is with 2 indicator light and has better quality!) One battery charger + 2 pcs 18650 3800mAh 3.7V Rechargeable Li-ion batteries Capacity: 3800mAh Type:18500 Voltage: 3.7v Quantity: 1 Chemical Composition: Li-Ion Use:Li-ion Rechargeable Battery for Strong light flashlight