The HP L41691-005 is a rechargeable lithium-ion battery for notebook use, identified with HP’s VR Backpack G2. Its part number helps distinguish it when selecting a replacement for a compatible configuration.
The battery has 2443 mAh capacity and 14.4 V output. HP’s service guide identifies L41691-005 as the four-cell, 36 Wh battery for the VR Backpack G2. It is listed for HP Z VR Backpack G2 configurations and is distinct from the separate eight-cell battery listed for the platform.