The Twist uses a buck/boost circuit to lower or raise the voltage and provide full range vaping. A buck circuit provides voltages lower than what you could get from the battery alone. A boost circuit provides for voltages higher than battery voltage. A good rule of thumb for long battery life in terms of chargeability is to charge it when the battery voltage reaches about 3.5v. It's 4.1v or so off the charger. When the taste wanes a bit, swap it to the charger. You always need two batteries so that you can swap back and forth.
There will be loss of ability to maintain higher voltages at some point in the charge level, but it will be minimal as long as you don't force it to perform until cutoff.
The Twist gives you 3.2v to 4.8v. It still uses a smaller battery inside the case with a limiter circuit that can supply 2.5 amps. If you use a 1.5 ohm dual with the Twist, it will back down voltages to prevent going over the 2.5 amp current rating. Over 4 volts, you may not be able to get advertised voltage.
That said, all you need for a 1.5 ohm DC is somewhere in the 3.5v range to vape satisfactorily. That's 8.16 watts. The common point for most vapers is 6 to 8 watts. If you need more power than that, I'd look for a 3.5 amp PV like the Provari.
Use the Twist with at 2.5 to 3 ohm coil and you will be able to use the entire range of voltage the Twist can provide. At 4.8v and 3 ohms, you will pull 1.6 amps of current and produce a 7.7 watt vape. That's a good place to be for battery life and a satisfying vape. If you need a little more, drop to a 2.5 ohm coil. You can actually use a 2 ohm carto at 4.8v and stay slightly under the max amp limit, but battery life will suffer. 2 ohms is good at 3.7v (6.845 watts).
There will be loss of ability to maintain higher voltages at some point in the charge level, but it will be minimal as long as you don't force it to perform until cutoff.
The Twist gives you 3.2v to 4.8v. It still uses a smaller battery inside the case with a limiter circuit that can supply 2.5 amps. If you use a 1.5 ohm dual with the Twist, it will back down voltages to prevent going over the 2.5 amp current rating. Over 4 volts, you may not be able to get advertised voltage.
That said, all you need for a 1.5 ohm DC is somewhere in the 3.5v range to vape satisfactorily. That's 8.16 watts. The common point for most vapers is 6 to 8 watts. If you need more power than that, I'd look for a 3.5 amp PV like the Provari.
Use the Twist with at 2.5 to 3 ohm coil and you will be able to use the entire range of voltage the Twist can provide. At 4.8v and 3 ohms, you will pull 1.6 amps of current and produce a 7.7 watt vape. That's a good place to be for battery life and a satisfying vape. If you need a little more, drop to a 2.5 ohm coil. You can actually use a 2 ohm carto at 4.8v and stay slightly under the max amp limit, but battery life will suffer. 2 ohms is good at 3.7v (6.845 watts).