=== Instructions of VERTEX 510 Battery ===
| ★ Press the button 5 times to lock / unlock, the LED light on the battery will blink 3 times |
| ★ Press the button 2 times to preheat, the LED light on the battery will continue to blink 15s |
| ★ Press the button 3 times to adjust voltage, blink green light =3.4v; blink blue light=3.7v; blink red light=4.0v |
| ★ To charge, connect the USB charger to the threading of the battery for charging |
