The price is for  5 batteries in total placed in one pack (minimal order quantity: 1 pack). These batteries fit for Syma X5 / X5C etc. 

Specs:

Capacity: 600 mAh

Voltage: 1S / 1 Cell / 3.7 V

Discharge Rate: 25C

Weight (including wire, plug & case): 15 g

Dimensions (mm): 25x8x43

Charge Plug: MOXEL-51005 2 Pin Female

Discharge Plug: MOXEL-51005 2 Pin Female