Business Notebooks

Hi,

I have an HP Elitebook 840 G5 and I wonder about the minimum requirements for charging it from a Power Bank.

Before, I had a HP Elitebook Folio 9480m with additional slice battery. That was great. Unfortunately this extra battery option is not available any more with the new models.

For this reason I am looking for another external battery. There are several options in the market. I am looking for something that has as high capacity as possible while still being allowed to carry onto a plane. That should be the case, if it has less then 100 Wh or 27000 mAh capacity. It should also be able to charge phones and other devices with a good variety of ports and standards. A typical use case for me would be working with the Elitebook on a flight and power it from the addtional external battery.

This is s what i found:

1. HP offers the 2XF31AA product with 20100 mAh capacity. It should work due to the 65W power output over USB-C. But it  has not the best capacity and port variety. Also, it appears to be bulky and expensive for what it offers.

2. The Batpower PDE 2 P26B seems to have all I need for a more reasonable price, but it is not well available in my region (Sweden) except for very high delivery costs and potentially additional customs fees.

3. The RAVPower 26800 mAh Powerbank with USB-C and 30W also looks good, but it only supports 30W / 1.5A at 20V Power Delivery. It is cheaper than the other two. Will the Elitebook 840 G5 accept that? I understand of course that it can not charge it with full speed. But will it charge at all?

4. The Anker Powercore+ 26,800 mAh seems to be similar to the RAVPower.

Does anybody have experiences with these or other power banks in combination with HP laptops and in particular with the Elitebook 840 G5?

What would be the minimum power delivery setting the 840 G5 model accepts? 45W? 60W? or is 30W acceptable? A statement from HP beyond just pointing at their own external battery would be great.

Best regards, Jörg