The primary process of charging and discharging that laptop batteries do is controlled by the hardware that is already built into your laptop. That same power flows out of the battery cells while discharging, which is something that sets laptop batteries apart from ordinary household rechargeables. The electronic circuit manages all the power that flows in the battery while charging. However, there is the added complex electronic circuit that will work in conjunction with the rest of the laptop’s hardware.
Like the rest of the batteries, laptop batteries come in a variety of sizes and shapes. The difference between a laptop battery and any other battery is minimal.