Compaq laptop battery series is a part of the HP batteries because Compaq was acquired by HP and then became a sub-brand of HP in 2002. If your Compaq battery not charging or drains quickly? Change it with a new one! Our Compaq notebook batteries are assembled by the high-quality cells and components to ensure faster charging and longer life. Each Compaq battery replacement undergoes multiple quality and safety tests. Moreover, it is covered with a 30-day money-back guarantee and 12-month warranty. You can rest assured to buy and use our HP Compaq batteries.