No, no, no.... You shouldn't use dual coils on a low voltage PV, but it's not because it can cause battery failure. It's because what you are really doing is heating up two separate coils and splitting your total wattage between 2 coils. For example, a 1.5ohm DC has two 3 ohm coils inside. If you use a 3.7V battery, instead of vaping with 9.12 Watts, like you would with a single coild carto, you're splitting that 9.12 Watts in half and distributing it between the two coils. So what you have is two coils, each using 4.6 watts and 4.6 watts is a lousy vape. OTOH, if you have a 5V battery, you're going to get two coils using 8.3 watts each and that's some good vaping.
What you shouldn't do is use a 1.5ohm carto on a low mah battery. That's not the same thing as a low voltage battery. A LR carto should only be used with a battery over about 450mah, so that means don't use it on a little mini-cig type PV. At 3.7V, a 1.5ohm carto draws almost 2.5 amps. If your battery is 250mah, that's a draw of 10C, and that's the upper range of a "high draw" battery like the AW lithiums, which mini-cig batteries are not. Most of those little batteries are rated for only about 5C or less, so you will trash them if you try to draw that much current.
The guy in Florida had his PV explode not because he was using dual coils but because he was stacking unprotected batteries that were probably mismatched and it caused one of the batteries to over-discharge. Personally, I use large battery mods and never let my batteries fall much below 3.8V, but protector circuits generally cut in at 2.3V, which is too far drained for my tastes.