Samsung 30Q, 15 Amp, 3000mAh, Button Top

Certain devices and torches require a button top. If your torch is for mounting on a rifle, a button top must be used. This is to stop the recoil forcing the spring back and denting the top of the positive terminal, there's a pressure vent behind it that you really don't want to block off.
 
 
Price is per battery
 
Battery specs:

- Model: INR18650-30Q
- Manufacturer: Samsung
- Chemistry: INR
- Max. continuous current: 15A (20A if kept below 75C)
- Nominal capacity: 3000 mAh
- Min capacity: 2800 mAh
- Nominal voltage: 3.6 V
- Charging voltage: 4.20 +/- 0.03 V
- Protection circuit board: No
- Size: 18.4mm x 67mm
 
Buyers must be aware of lithium safety before purchase. Please read my thorough battery safety guide - here