he shortest leg of the LED is green, and it is inserted into the G hole in the upper left corner of the board to determine the order. Performance: Input voltage: 4.5-9V (the best input is 4.8-5V without heat dissipation) Charging cut-off voltage 4.2V (between plus and minus 0.5% 4.18-4.22 of the lamp chip) Output maximum charging current 1000mA (single 500mA) Input voltage: 4.5-5.5V recommended 5V, too high voltage will reduce the charging current (chip withstand voltage can reach 8V, but the charging current of 8V power supply is extremely small!) Charging cut-off voltage 4.2V (between plus and minus 1% of the lamp chip 4.158-4.242) Output maximum charging current 1000mA (test environment power supply 5V, battery 3.8V) Consider that the actual working current of the actual voltage is around 900mA. If the charger voltage is higher than 5.2V and above, the chip heat will increase, and the chip's internal temperature protection circuit will automatically reduce the charging current. For large currents, please consider adding heat sinks by yourself. Charging knowledge: 1. The ammeter for testing current can only be connected to the 5V input terminal of the charging board. 2. The charging current is preferably 0.37C of the battery capacity, which is 0.37 times the capacity. For example, a 1000mAH battery charging current of 400 is enough. If the charging speed is too large, the effect is poor. 3. The charging connection wire should not be too thin or too long. This connection resistance is large. If it is too thin, the battery voltage will drop more after charging. 4. It is best to make good contact with the battery. Otherwise, there will be more battery voltage drop after flushing. 5. If the input voltage of 5V is too high, such as 5.2 or even 5.5, the charging current will be less than 500mA, which is normal. The heat dissipation of small package chips is not as good as that of large packages.