The Lenovo 5B10W86196 is an internal battery for compatible Lenovo notebooks, intended as a replacement power source. The listing identifies it as an original Lenovo part.
Its Li-Polymer design has four cells and a stated capacity of 4010 mAh / 60 Wh, with an output of 15.36 V. Check the model number when choosing a compatible replacement.
Listed models include Lenovo Legion 5-15ARH05 (82B5), Legion 5-15IMH6 (82NL), Legion 5P-15IMH05H (82AW) and Legion 5-15IMH05 (82AU).