HP Elitebook 1030 G2 uses an OM03XL battery with specifications of 11.55V voltage and 57Wh capacity. It is a rechargeable, 3-cell lithium-polymer battery and is also compatible with the part numbers 863167-1B1, 863167-171, and 863280-855.
Key specifications
Model: OM03XL
Voltage:

11.55V11.55 cap V
11.55V
Capacity:

57Wh57 cap W h
57Wh
Cells: 3-cell