I don't have stairs where I'd need to use it, by design, and it's pretty easy to slide things onto it especially if you put a flat piece of cardboard on it, but yes, important things to consider! It's still a lot easier to slide something on it and jack it up 4' effortlessly rather than lift it and maneuver it or have to have 2 people. As with everything in life, YMMV.
We guarantee that we use lifepo4 battery cells, and we have a 5-year warranties. The reason our batteries are lighter is because we have specially customized the corresponding casing for the 150Ah battery cell.
Which invokes some type of subconscious rage in relation to San Antonio Texas standing on yellow dots being yelled at by some dude in a mountee hat yelling at me to pick my stuff up and put it back down for seemingly hours on end