Processor internal battery?

[jfmorin]

Need to change the battery on a H4-P5-H48-HRL.. is it the same model (TADIRAN TL-5135)?

[danigee]

The "processor internal battery" you're referring to is likely the CMOS battery, which maintains BIOS settings and system clock. If it fails, it can cause issues like incorrect system time and BIOS errors, but it’s not usually a major problem for most users. It's not something you can pick up at a drugstore, but it’s typically an easy replacement for a technician or yourself.
If you're worried about your current setup or considering upgrades, you might look into options for free laptops, to ensure you're equipped with reliable hardware.