On AC chargers, it could end up stopping / charging you idle fees, although 1kw is probably enough to keep the charger "alive". On DC chargers that wouldn't happen, given the car needs to signal the charger to stop the charge (and if you charge from 99% to 100% it probably charges at around 1kw

).
This article seems to indicate
http://koreabizwire.com/hyundai-mot...-evs-over-potential-battery-fire-risks/171516 that owners in Korea see issues with "charge time of two hours to up to 70%".
Uh, why is there no-one in Korea doing any serious analysis of this :-/.
EDIT: Someone in this forum (
https://cafe.naver.com/allfm01?ifra...6articleid=525417%26referrerAllArticles=false) seems to indicate the 80% / 90% check is not happening all the time:
"
@ 40 minutes cut application Ministry of Environment rapid (best speed around 60kwh), a total of 3 attempts.
- Primary
. 50% -> 84% for 38 minutes
. 80% slower than the start
. No self-inspection (no in 80%)
- Secondary
. 84% -> 96% charge for 40 minutes
. Self-inspection for 10 minutes at 90% (1kwh speed)
. 93% slowed down again by half (i.e. 1/4 speed compared to the first)
-3rd
. 96% -> 98% charge for 30 minutes
. Self-inspection for 10 minutes at the start (1kwh)
. After that, it drops to 4kwh speed
"