Links to HKJ's website only work when using the "Advanced Post Editor" (look at "Input format" under the box you type your post in). I think you were linking to this review: King Kong ICR26650 4000mAh (Gold)
These cells have no protection, the "Protection test" chart simply illustrates the lack of a protection circuit. I think you are misunderstanding the graphs in general, "Ah" and "Wh" are not measures of time. Even the charts with time on the x-axis are useful to you. Take a look at the link at the bottom of the review, "How is the test done and how to read the charts". Hopefully that will help get you up to speed!
When I say "voltage sag" I am referring to the amount voltage falls below "resting voltage" while the cell is under load. I typically refer to the first chart, but the others are also useful.
In order to have a firm grasp on what's happening in a DD setup (including how much voltage sag you'll have and how much current you'll push) you'll probably also want to look at high current XP-G2 on copper tests done by Match and djozz here on the forum:
- Post #51 of djozz's "Crash-testing a XM-L2 and a XP-G2 on copper Sinkpads" thread
- The first post of Match's "Emitter Test Results pt4: XML2, XP-E2, XP-G2, and Nichia219! (along with sinkpad tests)"