I use to have the tab S2 and that sounded right. the Tab S2 was released before the times of fast charging and super fast charging.
my Nephew has a Samsung A3 2016... he's only 10... anyway when he charges it... it feels like a eternity cause I'm so use to super fast charge... but it's just cause he's got a older phone (no way spending loads on a phone for a 10 year old).