，Compatible for ONEVAN， Rechargeable Lithium Battery 15000MAH BL1850 BL1840 Cordless Electric Wrench Drill Power Tool 21V 18V Battery(2 1 Charger)

Using high-capacity lithium battery cells, the power is ample and not exaggerated, providing strong and lasting endurance. It is compatible with tools such as electric drills and impact screwdrivers, allowing long-duration work without frequent charging worries. Stable constant-voltage discharge output ensures a smooth current without sudden spikes or drops. The power remains strong without weakening, providing full strength for drilling and screwing, keeping performance energetic without fatigue or stalling throughout the operation. With nine built-in safety protection mechanisms, it features overcharge, over-discharge, overcurrent, short circuit, and overheat protection, effectively preventing swelling and leakage. It is safer and more reliable for long-term use in industrial and household environments. The battery cells are resistant to high and low temperatures, providing stable output in both winter and summer conditions. It can operate outdoors on construction sites without fear of temperature differences and maintain stable power even in harsh working conditions. Equipped with an intelligent voltage-stabilizing and energy-saving chip, it outputs low power consumption and saves energy, reduces motor load, protects the electric drill's mainboard, lowers tool failure rates, and extends the overall lifespan of the device.