I'm not aware of any 4.8 volt-nominal NIMHs in 14500 size. 14mm diameter x 650mm length (400mAh) and 17mm x 650 (600mAh) are the only vaping-compatible NIMHs I've ever seen for use in PVs where 14650/18650 Li-Ions or IMRs would otherwise be used.
Those batteries are simply four 1.2 volt, 160mm long NIMHs stacked in series and then wrapped, so using only three of the 14mm diameter NIMHs rather than four would result in a 14480 battery providing 3.6 volts and 300mAh, which might not be long enough for 14500 PVs. They wouldn't provide much vaping time before needing to be recharged, either. Most 14500 Li-Ions/IMRs are about 500-600mAh in real world power, so 300mAh wouldn't last very long.
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