Features: Size: approx 63x90x9mm/2.5x3.5x0.35-inch. Suitable for emergency- start of the vehilces. Used for Electric drill and other power tool LiFePo4 battery. Fitting for motorcycle with LiFePo4 battery. With Over-current, Over-charge, Low-voltgae Short-circuit protections, temp control. Specifications: Material: PCB+metal Size: approx 63x90x9mm/2.5x3.5x0.35-inch Continuous Current: within 50A Instantaneous Current: Max-800A Charging Voltage: 14.8V~16V Charging Current: within 20A Balance Current: 40mah Overcharge Protection: single cell 3.75V0.025V Over-discharge Protection: single cell 2.00V0.05V Short Circuit Protection: yes Note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Battery Protection Board