comments:
I don't recognize this brand at all. And the guy you're talking with also has a point - most chargers automatically drop down to a SPECIFIC wattage max if something is plugged in. The name for claim on this charger is that it can dynamically output any wattage as long as it adds up to 100 - even Anker's high end chargers don't do that - they have hard-cap limits, and sometimes plugging in devices on any port but the physically highest or leftmost port results in the max wattage dropping down, EVEN if the initial device doesn't require extra wattage. Yes, you are right, the devices DO negotiate wattage, but what u/Unable-Log-4870 is trying to point out is most high wattage multiport chargers DROP DOWN depending on 1) how many devices are connected to it 2) what combination of PORTS you connect it to and 3) the physical wattage limit of the charger (and this is usually the part that actually factors in LAST because you get kneecapped by 1 and 2) So the answer to that is to either buy a charger that can dynamically assign wattage (what this charger claims, which I kinda doubt for its price point) or to just buy the BIGGEST baddest beefiest charger out there that can output the most amount of wattage out of each of the ports (Anker's Prime series chargers and power banks do this - one of their best workhorse PowerBanks is this one: https://www.amazon.com/Anker-Portable-Compatible-Charging-Included/dp/B0BYP2F3SG for that reason).
This is my personal favorite. Anker Prime 27,650mAh Power Bank...