I could be wrong, but my REV blinks three times to let me know it's overheated. Overall though it's a great product and battery life is excellent
You shouldn't be getting dry hits with your Pro Tank at such low power.
There's no reason to max out your voltage. The point to higher voltage is to get the coil hot. All increasing your resistance is going to do is increase the voltage you need to get to the same temp. Whatever carto you're using start low and turn it up until you like the taste. If it tastes burnt, turn it back down. The point of VV is just that you can adjust for whatever resistance your coil is. If that 1.8 dies and somebody gives you a 2.5 you can still get the same performance by turning the voltage up. If they give you a 1.5 you can turn it down.
This is it exactly. mah=Mili-Amp-Hours. so it effects how long the battery takes to charge and how long that charge will last.I have a similar set up to yours. I have a basic battery similar to your smoov rev its just a twist battery with 1000mah (i think its mah) (and i think mah means how long itll last til you need to charge it).