Method of use: connect the display plate Positive and negative port with the tested battery Positive and negative port, the digital tube will show the quantity of battery electricity in real time
Digital Color: red contour, blue of the display block (when the amount of electricity of the battery is full, it will be all on)
When the battery voltage exceeds N * 3.3 V, 1 block of electricity quantity will light (note: N represents the amount of the battery)
When the battery voltage exceeds N * 3.5 V , will illuminate 2 blocks of electricity quantity
When the battery voltage exceeds N * 3.7 V, it will illuminate 3 blocks of electricity quantity
When the battery voltage exceeds N * 3.9 V, it will illuminate 4 blocks of electricity quantity
When the battery voltage is less than N * 3.3 V, the 4-block display will be off; represents a battery less than 3.3 V, and you can charge the battery
