Question on Use Times Between Recharges

[Revmann]

If I have a set wattage level I like, would going to a higher resistance cartomizer at higher voltage give me better battery life between recharges due to reduced current?

 

[Rader2146]

Depends on your mod. What is your setup?

 

[Motoman101]

True all depends. I have a provari. Use 18350 batteries. Can go all day. I vape a lot.

 

[Revmann]

I currently use a Madvapes VV box kit. I have an ego twist for backup. I also have parts coming to build a VW box mod. Both the mad vapes mod and the vw mod use/will use 14500 bats. I have been using 1.7 ohn single coils at lower voltage because I had them.

 

[Rader2146]

A boost regulator (eGo Twist, Provari) will get less time out of a charge by using higher voltage. This is because it must use more power (and thus more current) to convert the lower battery voltage into the higher output voltage.

A buck regulator (Madvapes VV, OKR mods, VMax, anything using 2 batteries in series that reduces the battery voltage to the desired voltage) will get more time out of a charge by using higher voltage. This is due to regulator efficiency, and higher voltage at the same wattage equals less current draw from the batteries. This is especially true for linear buck regulators (Madvapes VV) that shed the excess voltage as heat output; wasted energy. A switching buck regulator uses pulse width modulation to control the output voltage so that much less energy is wasted.

 

[Rader2146]

Just an example for you MadVapes VV box at 8 watts preferred output.

With 1.7 ohm carto:
Output volts: 3.6v
Output current: 2.22A
Input power: 16.5w
Power wasted as heat (input power-output power): 8.5w

3.0 ohm carto:
Output volts: 4.89v
Output current: 1.6A
Input power: 11.84w
Power wasted as heat (input power-output power): 3.84w

The lower output current and lower waste will both increase charge life.