{"id":4050,"date":"2026-01-06T06:54:08","date_gmt":"2026-01-06T05:54:08","guid":{"rendered":"https:\/\/www.batteriedeportable.com\/guides-et-conseils\/replace-hp-laptop-charger-voltage-current-connector\/"},"modified":"2026-01-06T06:54:08","modified_gmt":"2026-01-06T05:54:08","slug":"replace-hp-laptop-charger-voltage-current-connector","status":"publish","type":"post","link":"https:\/\/www.batterylaptop.co.uk\/guides\/replace-hp-laptop-charger-voltage-current-connector\/","title":{"rendered":"Replacing an HP power adapter: everything you need to know about voltage, current and the connector"},"content":{"rendered":"

The power adapter is a vital, yet often underestimated, component of laptops. Its presence is usually only noticed when it fails, forcing you to urgently look for a replacement.<\/span><\/p>\n

Given how tricky the choice can be, this guide aims to bring together the key information about HP\u2019s specific requirements. The following sections focus on the different types of <\/span>chargers designed for HP laptops<\/b><\/a>.<\/span><\/p>\n

Why you need to be careful when buying a new adapter<\/span><\/h2>\n

It\u2019s common to end up needing an alternative power source in a hurry, for example after forgetting your charger at home. You then try to use any adapter whose plug seems to fit. If the machine powers on, you assume everything is fine. However, that is not always the case.<\/span><\/p>\n

Using a charger whose specifications do not match your laptop\u2019s requirements can cause problems.<\/b> Here are the different possible outcomes when there is an incompatibility:<\/span><\/p>\n

    \n
  • The adapter you chose is correct, no issue.<\/span><\/li>\n
  • The voltage is correct, but the current is higher: <\/span>this will work perfectly<\/b>, because the laptop regulates how much power it draws.<\/span><\/li>\n
  • The voltage is correct, but the current is too low: the laptop will run, but the charger may overheat and the <\/span>battery<\/b> will not charge.<\/span><\/li>\n
  • The voltage is too high and the current is correct: the device may shut down or start up, but the charger will heat up dangerously. There is a risk of blowing the protection fuse or, in the worst case, <\/span>damaging the laptop\u2019s motherboard<\/b>.<\/span><\/li>\n
  • The voltage is too low and the current is correct: the laptop may not power on, although the likelihood of causing damage is low.<\/span><\/li>\n<\/ul>\n

    What to check on an HP adapter<\/span><\/h2>\n

    Several technical factors must be considered to correctly choose a new power adapter for an HP laptop.<\/span><\/p>\n

    Input voltage (INPUT)<\/span><\/h3>\n

    This is the AC power that the adapter draws from the mains. This value is between 110V and 240V. Standards vary from one region of the world to another. Most adapters are designed for a 100V to 240V range. <\/span>This allows users to travel without having to buy a new charger<\/b>, as long as they have a physical plug adapter for the wall socket. The value is shown on the charger label next to the wording <\/span>(INPUT)<\/b>.<\/span><\/p>\n