I'm vaping Hohm Wrecker G2 at 160-170 watts.
That wattage in a dual battery mod, like everyone said you'll never see charge longevity with any battery. You need to be looking at battery safety the most really and let that decide your best battery for the $$$.
170watts/6.4volts lowest charge=26.5625/90% mod efficiency=29.5139amps you are needing to run that mod properly.
LG HB2, 4, or 6 in the application you are running, 1500mah yes, but they are 30amp CDR which you are needing.
Needing to run at 160 to 170watts and get a decent charge run time you need a 3battery mod
170/9.6volts lowest charge=17.7083/90%=19.6759amps needed
Sorry, but numbers and the Watts Formula of Ohm's Law don't lie, the Hohm Wrecker G2 is a nice mod and all, but it is in a category that is way to overspeced it can be dangerous, oh, it can do 180watts safely, in a sense yes with any 20amp + CDR battery, but it is that lowest charge on the batteries where the amps are pulled more and more to convert to the need volts to maintain the watts set, average about 3.2v per battery, thus the 6.4 and 9.6v figures, 3.2v X number of batteries. That wattage setting the lowest charge per battery to safely do it at 20amp is in the 3.5 to 3.6v maybe the 3.7v range, if the chipset is programmed smart like the DNA boards where if battery sag or amp sag is detected it gives a weak battery signal, there should be no problem, but if something goes sideways with the control circuits, you're screwed. Lowering your wattage or watching your battery charge constantly to change out the batteries at about 1/4 to 1/3 charge, you might get away with using the VTC5A (the new revamp of the VTC5, 2500mah but 25amp CDR with an impressively long discharge curve), they are pricey but very nice batteries.