NShi HSTNN-IB8K laptop battery 15.4V 53.2Wh

15.4V 53.2Wh replacement battery

This lithium-polymer battery replaces the original HP HSTNN-IB8K unit in compatible Envy x360 13 and Envy 13 notebooks. It delivers 15.4 volts and 53.2 watt-hours of capacity. The pack is factory sealed and certified to CE safety standards. It suits owners who need a direct swap for a worn or failed original battery.

Capacity and runtime headroom

The 53.2Wh rating provides the same energy reserve as the factory pack for everyday office work and media playback. Heavy multi-tasking or sustained high brightness will drain the charge faster than light use. The integrated safeguard chip manages cell balancing and authenticates with the system firmware. Users who need significantly longer unplugged time will find this capacity fixed.

Li-ion chemistry with authentication chip

The battery uses lithium-ion cells governed by a built-in safeguard chip that communicates with the notebook's power management. This chip handles authentication so the system recognises the pack as genuine. Without this handshake some HP models refuse to charge or report an error. Buyers whose laptop requires a different voltage or connector cannot use this part.