This application provides a battery, including a packaging bag, an electrode assembly, an adapting member, and a sealing member. The electrode assembly is disposed in the packaging bag. The electrode assembly includes a first electrode plate and a first tab, and the first tab is electrically connected to the first electrode plate. A first end of the adapting member is connected to the first tab, and a second end of the adapting member protrudes from the packaging bag. The sealing member is disposed between the adapting member and the packaging bag. In a width direction of the battery, a width of the first tab is greater than or equal to a width of the sealing member. With an improved relationship in size between the first tab and the sealing member, the battery can effectively prevent the sealing member from piercing through the electrode plate when the battery falls down and can improve battery drop performance in a simple and effective way, without affecting the energy density or production process of the battery.