Purchased this for on-the-go charging when an outlet plug isn't accessible. My Asus 2-in-1, 14" vivobook laptop has a 57Wh battery, which is a little more than 15k mAh. I used an adapter between the original plug and type c anker power bank and it charged my laptop to 100% within 40-45min. This matched the fast charge 60% in 49min claim for this Laptop's features.
As for the power bank, by the time my laptop was charged, the power bank was at 0%. So for a PC laptop that was bought in 2019, I cant complain with the results. The 87W approximate output satisfied my Laptop's 45W-65W input requirement. It does feel slightly heavier than my previous Eggtronics 20k mAh powerbank, but it is much smaller overall than my Eggtronics power bank. My old one only had around 30W max output, so the charging kept flickering. Hence, I pulled the trigger and bought the anker powerbank specifically for the 87W charge. I only need 1 full charge for my laptop between school and commutting home. For a 3-4hr study session relying on a traditional plug in, I can extend my study to 5-6hrs now if I leave the house with both laptop and power bank at full charge. I may update again in a few months. As for confirmation of capabilities, it does hit the superfast charge level on my samsung s22 ultra however, using my power bank on my samsung charging pad (long rectangular model) the yellow lights showed and kept flashing, meaning it isn't compatible with the charging pad. This would mean Id have to bring the individual cable specific to my samsung watch if I intend on using the power bank to charge it.