If your HSBC physical Secure Key battery has died, you cannot replace the battery yourself as it is unique to the device and sealed for security. You must obtain a replacement device or transition to a digital version. Steps to Resolve a Dead Secure Key Battery
The battery failure of the HSBC Secure Key is a standard end-of-life event. While it temporarily restricts access to desktop online banking, service can be restored immediately by switching to the Digital Secure Key on the mobile app, or within a week by requesting a hardware replacement via telephone banking. hsbc secure key battery died
The HSBC physical secure key (or "dongle") is designed to last about five years, but its battery can eventually fail. If your device is displaying a "bAtt" message or has stopped working entirely, follow this guide to restore access to your account. If your HSBC physical Secure Key battery has
If you prefer a physical device or do not have a compatible smartphone, you must request a new one from HSBC. Replacement devices are usually free of charge. How to activate security device | HSBC Online Banking While it temporarily restricts access to desktop online