Minor quibble: running NiMH under 1 volt per cell isn't recommended. Under load, I see why they're choosing 0.8 V as that's the load voltage, not the relaxed voltage. I don't have any particular objections running load voltage down even a bit lower than that, so long as relaxed voltage is 1 V or greater.
That's for the Duracell DC1500 battery (fairly high quality) only. Just like lithium, different manufacturers will have different curves--and projecting this onto a no-name cheap battery would be a bad idea.
I wish we had the discharge curve on that battery at 10C. Well, no matter, it should perform well in the 5A range. Please note it's a 2/3 A size, so kind of hefty in terms of diameter but by no means extremely large.
If that thread weren't ancient...
One word of warning. NiMH aren't protected batteries, but are protected in the sense that they have vents just like LiMn (but neither require protective circuitry). And they will vent hydrogen gas if you push them too far.
Hard short any commercial off-the-shelf battery and things will get very interesting.
Really, the only perfectly safe battery is...er, maybe zinc-air, and I still wouldn't swallow them.
But output is so low it couldn't be used for vaping. In all cases, any battery from alkaline to lead-acid to NiCd to NiMH to lithium packs a punch--that's what they're built to do.
Warning two: Using a fifteen minute charger is a very quick way to encourage your battery to vent, reduce service life, and destroy a battery that should last years in a year or so. Fast chargers are fine, I use one myself, but fast in this case is 3-4 hours. Most of the time I just leave it on slow setting and let them charge in 5-6 hours. Most hyper-quick chargers don't top the cell very well either, so you never charge to full capacity (which, as with lithium, does no harm, but why give up capacity?)
Interesting note: Most batteries have no memory effect. Even NiCd, which gave rise to this fallacy, only has it under extremely specific circumstances and we only ever saw it in our satellite batteries. In the normal person world, NiCd's memory effect never comes into play.
