HP 800513-001 is a primary battery for compatible HP notebooks, supplying power when the notebook is away from an AC source. It is identified as CS03XL, also designated CS03046XL-PL.
The lithium-ion pack has a 3-cell configuration, a rated capacity of 46 Wh and a charge capacity of 4.08 Ah. These details help distinguish this variant when matching a replacement part.
HP service documentation lists this battery part for the EliteBook 745 G3 and EliteBook 755 G3. Use it for replacement or repair of those models when part number 800513-001 is specified; checking the model designation and capacities helps identify the part during maintenance.