FOCUSTEC SH03XL 57.9Wh 11.55V laptop battery

Replacement Battery for HP Spectre x360 13-ac

This 57.9Wh lithium-polymer pack operates at 11.55V and contains three cells. It is a new component built with grade A cells and carries part number SH03XL. The unit is intended for owners of compatible HP Spectre x360 convertible laptops who need a direct replacement for a depleted original battery. It ships with a set of screwdrivers to simplify the installation process.

Verify Your Laptop Model

Check that your device appears in the supported model lists such as 13-ac0xx, 13-w0xx or 13-ab0xx and that the original battery matches one of the compatible part numbers including 859356-855, 859026-421 or HSTNN-LB7L. The connector layout and physical dimensions are specific to these series. Buyers whose laptops fall outside the listed model ranges will find this pack does not fit or connect correctly.

Thermal Behaviour and Power Characteristics

The lithium-polymer chemistry delivers stable voltage output with minimal heat generation during typical office and media workloads. Grade A cells are factory tested to maintain low internal resistance, which helps keep the battery cool while charging and discharging. No active cooling is required and the pack adds no audible noise to the system. Power draw follows the laptop's own management profile without imposing additional load.