stand

Getting a floor jack, trying to find the lowest price and size that will do the job well. I want to lift high enough at one jack point so I can put a (low) jack stand under the other point, jack pad included. Options range from 20" / 510 mm lift (big, pricey) to 14" / 360 mm (cheaper, smaller...

Can anyone with a Powerwall2 tell me if the bottom of them are completely flat, or whether they have some protrusion or "feet" on the bottom that they rest on when installed on the floor? I'd like to know if my DIY stand should be flat or accommodate any such "feet" if the Powerwalls have any...