What is the battery warranty on the HP 255 G8, and can the battery be replaced by the customer?

The battery on the HP 255 G8 is internal and cannot be replaced by the customer — it is serviceable only under warranty. Batteries have a default one-year limited warranty, and more information is available at http://www.hp.com/support/batterywarranty/. The battery is rated for 1000 cycles at greater than 65% capacity at 23°C. (Page 9, Page 24)