Even comparing to all the “high end” kickstarter/indiegogo graphene banks (uze bold/bold2, chargeasap flash 2.0/pro plus), and even with all its flaws (namely, the inaccurate battery SoC percentage meter, and no passthrough charging on this model - why?!), the Prime 250W is still the most up-to-date (protocol-wise) power bank on the market. It’s even got a slick app, albeit completely unnecessary.Since hardly anybody talks about on any reviews, reddit, forums, etc… about the cool dual port charging, I’ll talk about my experience here. After trying out a few different PD3.1 chargers, and making sure the cables were all good with my trusty KM003C, my best case maximum combined charge rate hit 166.5w. And that’s only when the battery’s display meter shows ~90%. I was hoping that it would get the full 170w beans (or more) because I generally get to its second highest rate of 166.2w at around 66%, which is at least somewhat positive that it can do the bulk of the charging at *nearly* the highest rate. Still… I can get single port charging at 141w, which is over advertised. Why can’t I get to 170w? Also, importantly, the unit definitely doesn’t heat up as quickly when charging via dual ports versus a single 140w port. Single port I’ve gotten to 40C, whereas dual port it’s 37-38C when it hits 100%. So I don’t think I’m hitting a thermal limit thats throttling me but I could be Wrong…. So maybe next time I’ll test my next dual port charge in the fridge.About the inaccurate battery percentage meter. It’s well reported by many. When the unit’s meter hits 100%, the real life battery charge is closer to 80%. I’m not going to talk about as to why that is, but you can speculate some logical reasons why Anker did this. Anyways, if you have an external meter, you will notice that the battery is still pulling a good amount of watts (100W+), which slowly trickles down to 0.1w. As I write this, it’s been 30 mins since I hit 100% and it’s still drawing a few.Although I hate the form factor that all the newer power banks are being manufactured as (i prefer the old style flat brick, not a thick brick), I think my 166+ watt dual port charging makes it the fastest charging usb bank on the market. All those graphene power banks designed years ago but released recently are all outdated. They claim they have amazing output with their SINGLE usb-c port having the ability to output 140W (if they even have that, most are still 100W at best) and their “ultra mega deluxe high speed” 100w input charging due to the efficient cooling of graphene (what a crock of s*).The Anker Prime 250W, with its plain ol’ lithium ion (I doubt it’s LiFePO4 otherwise they’d be raving about using those type of cells in the advertisement) can take a lot of input power which I just love. Although I haven’t tried any of the other latest cheap chinese branded PD3.1 banks to compare..z I read that some can even do dual port charging too but I digress.I wish they would make an actual graphene power bank and blow all other products out of the water. Have single port 240W EPR charging/output…. One can only hope. Maybe when TB5 and usb4v2gen3.2 3x3 comes out we’ll see a generational leap in tech with these power banks.