Oh good old LP, not met or spoken to the guy however I got band from all his FB groups for questioning the performance and features of a few of his products , well I guess it that but so I'm safe saying that as can't get anymore banded lol.
On the battery
The pack will draw as much current as you can give it to a point but it's when is critical , 9A is the limit at the constant current stage of the cycle it will draw as anything above that and it will throw an over current error, as the charge state progresses it's gets very critical on the amount of current being drawn and this is directly related to the charge voltage in the constant voltage stage at the end, if the charge voltage is above 26.20v exactly it draws to much current at the end and gives a overcharge error.
The DJI adapter is rated at 26.3v BUT it actually is between 26.1 and 26.2, the cheap CN black inspire charger that's around is rated at 26.3 but I have measured it going up to 26.6 and almost everyone who bought one had over charge errors with it, I have come up with a mod to reduce the charge voltage to the range above and t works fine but it's very low rates at 2.6A per pack.
Anyhow back onto the 180w as i have digressed, basically the pack will take upto 9A in the bulk section of the charge if you let it but I would not for one minute do that, I have charged upto 200w with out issue and my own home made charger is 150w per pack and Iv not seen anything to suggest a rapid loss in capacity compared to charging at 100w.
But that's not to say some packs could loose capacity quicker charging at 180 compared to 100w but this could also just be FW being over cautious, the general rule is the lower the charge current the better it is on the pack, all of the TB packs loose some capacity quickly compared to new, in fact my brand new TB48 and 47 lost a little after 2 cycles on the 100w DJI Adapter, the Inspires battery FW is knows to be very aggressive on reducing remaining capacity sadly.
Basically don't worry about it and I class the life of the packs regardless of charging at around 200 cycles regardless anyhow.
Hope that little rant makes sense.