BATTERY

The disclosure provides a battery, including a first electrode plate and a separator, the first electrode plate including a first current collector and a first coating located on a surface of the first current collector. The first coating is connected to the separator; and a surface of the first coating is provided with a recess, and an air permeability S of the separator and a width L of the recess satisfy: 5000≤S×L≤75,000, where S is in sec/100 cc and L is in μm. The disclosure can improve the rate capability of the battery while reducing the voltage drop of the battery and reducing the risk of short circuit.