This protection board can the capacitor and lithium titanate battery. It is suitable for 179V voltage capacitor and lithium titanate battery. The protection voltage can be finely adjusted in the range of 2.5V-3V by replacing the voltage divider resistor (higher equalization voltage is needed). Replace the high resistance power resistor). The working principle of the circuit is that when a single cell/capacitor voltage is higher than the equalization voltage, the circuit internally discharges the battery/capacitor by turning on the triode, and the excess power is dissipated by the power resistor. Circuit equalization voltage accuracy is plus or minus 1%. Connect from the negative pole of the battery pack. The first line labeled "-" on the protection board is connected to the negative pole of the first battery, and the second line is connected to the second battery of the first battery compartment. On the chip, in turn, it is connected to the positive pole of the entire battery pack. Colour: as shown Material: PC+metal Package Contents: 3 x LTO 6S Balance Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.