Electron GX-200 Includes: … 2 (18650), 40amp, 1600mah,Product size:100*50*24mmHousing Material: Aluminum510 Connection : Stainless steel.Product parameters:1. Working voltage 3.2- 4.2V2. Max output 20A3. Output voltage is equal to the battery voltage

4. Lowest recognized resistance 0.2ohm

5. Low voltage protection 30A

7. Two 18650 batteries parallel connection, can be charged with micro USB cable or 18650 charger.

8. Short-circuit and reverse battery protection.

9. Adjustable 510 positive contact.

10. Charging voltage: Micro charger DC5V.

11.Max charging current: 800 milliamp

12. Automatic circuit-breaker will trigger after 15 seconds of pressing the power button.