07-31-2017 03:15 PM
I'd like to run my EliteBook 8570p from a 12v AGM battery while traveling, but without having to introduce the inefficiency of an inverter, so I'm looking for a power supply that'll convert the 12v nominal (11-14.6v) source to regulated 18.5v as output by the existing AC supply. I've been unable to locate a 12v HP supply and so wondered if anyone had already done this using other sources or equipment.
Currently I'm looking at using a "uxcell Power Converter Regulator DC12V(10V~16V) Step-Up to DC19V 8A 152W " found online. The 19v output should be close enough with plenty of available power to keep the load near 50% of its capacity (giving me 96% efficiency). I'll use a 15A fuse on the +12v and have a DC switch inline. I can't find it in the laptop spec., but it looks like the EliteBook needs a 7.4mm x 5.0mm power connector, anyone know for sure? Finally I'll connect any ground (such as that to the laptop) to the -ve supplied by the battery, as this is also connected to the chassis of the vehicle.
Can anyone see any problem with the above, or describe their own solution?
07-31-2017 03:32 PM
I really cannot recommend this arrangement but if you can rig it up to get 19v and enough amps into the right plug I guess it will "work" but slightly nonstandard current can wreak havoc with laptop circuitry. I can only recommend you use a laptop power supply with the correct specifications through an inverter.
08-08-2017 04:40 PM