The Sony VTC5A is an 18650 Battery with 2500mAh Capacity, Maximum Discharging Current of 25A. 

All Sony VTC5-A Batteries are shipped with an included hard plastic battery case

Contents
1 x Sony VTC5A 18650 2600mAh 25A Battery

Features
18650
2600mAh
30 Amp discharge rate - ability to build lower resistance coils and therefore place less stress on the battery
Type: Li-Mn Hybrid IMR
Rated Capacity: 2600mAh (High Drain)
Rechargeable
Maximum Rated Discharging Current: 25A
Storage Voltage: 3.6V
Charging Voltage: 4.2V
Diameter: 18.45mm max +/- 0.05mm
Length 65.20mm max +/- 0.05mm
Weight : 44 g Average
Positive terminal: Flat top