Features: Brand new and high quality This protection board can protect Farad capacitors and lithium titanate batteries, and is suitable for Farad capacitors and lithium titanate batteries with a voltages of 2.7V The protection voltages can be fine-tuned within the ranges of 2.5V-3V by replacing the voltages divider resistor (highers equalizing voltages needs to replace the high-resistance power resistor) The working principle of the circuit is that when the voltages of a single battery/capacitor is highers than the equilibrium-voltage, the battery/capacitor is discharged by turning-on the transistors inside the circuit, and the excess power is dissipated into heat through power resistor. Circuit equalization voltages accuracy 1% The single-piece protection board is suitable for any 1-6S battery/capacitor. When the number of string is less than 6S, connect it from the negative pole according to the wiring diagram, and leave the lines empty. Specifications: Material:PCB Size:Approx.7.6x4.6cm/2.99x1.81inches Cable Length:Approx.30cm/11.81inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Balance Board