Lenovo BATTERY 1cell 3V (manufacturer number 5B11Q29235) is a lithium spare battery listed for notebook use. The listing names Lenovo as the compatible brand and specifies a single cell with a voltage of 3 V.
It is a replacement battery component for use in the Lenovo notebook context, rather than a general-purpose power supply or charger. The listing does not identify a compatible notebook model, capacity or physical dimensions, so check the manufacturer number and listed specifications when identifying the part.