Question about battery voltage shut off

[MasterofNone]

Hi all. Basically I've been using a mech mod ( reo grand) and I've been thinking about the battery... I'm not completely happy with the fact that I either have to bring a voltage meter or "guess" when my battery needs changing, and would like my device to stop firing when the voltage gets too low. I could use a kick ( in fact I do) but I have to drop down a battery size. What would it take to make a drop in device that does what the kick does, but without variable wattage? Just the shut off feature, basically? Am I crazy for wanting this? Lol

Thanks in advance all!
Tim

 

[Alexander Mundy]

None that I am aware of.

You could take a commercial protection pcb and turn it into a drop in piece, but all the ones that I have seen have such a low cut off voltage (around 2.5V) you would change out the battery in a mech due to low performance before the protection cut in. Also the ones I have seen are only good for 2, 3, or maybe 4 amps.

Depending on coil, I find performance drop off leads me to change the battery around 3.4 to 3.6V which is way above safe discharge voltage.

Again, that is with a mechanical. With a VV circuit it needs a cut off or some way of monitoring battery voltage since the converter could continue to draw from the battery below safe levels with output remaining constant.

 

[CaliVaper]

I've wondered the same thing. I'd really like to see a mechanical mod that at the very least had a simple display that would display your voltage.

 

[NicoHolic]

I have two REO Grands, one with a 0.5Ω coil using 1600 mAH 18650 AW IMR, the other with a 0.8Ω coil using 2000 mAH AW IMR. When I've gone through a bottle of 5.5 or so ml of juice, the battery is between 3.6 - 3.7 volts. So I swap it out whenever I refill. Same with the 18490 AW IMR in my Simplicity after a 2 ml IBTanked on the Sophia RBAs. If I refill or swap tanks before the bottle or tank is empty, I go ahead and swap the battery out at a higher voltage. If anything, that's even better for them. I rotate three batteries for each mod.

 

[NicoHolic]

I've wondered the same thing. I'd really like to see a mechanical mod that at the very least had a simple display that would display your voltage.

Then it wouldn't be a mechanical mod. Mechanical mods don't use wires, circuit boards, etc. The body is the conductor.

 

[CaliVaper]

Then it wouldn't be a mechanical mod. Mechanical mods don't use wires, circuit boards, etc. The body is the conductor.

Of course it would still be a mechanical mod. It would still use the body as a conductor, have a mechanical fire button that does not rely on a circuit board, would be unregulated.

It would just be like having a miniature Digital volt meter permanently hooked up. But rather than having the display of this "volt meter" housed externally in a plastic housing like an actual volt meter, it would just be the display mounted to the mod tube. Obviously to have a display, you'd need to have a circuit board, but the mod itself would not use it to function.

 

[Alexander Mundy]

I've wondered the same thing. I'd really like to see a mechanical mod that at the very least had a simple display that would display your voltage.

I have this ordered for future usage.
Not a digital display, but a small PCB with color changing LED:

LED Battery Level Voltage Monitor Meter Indicator Alkaline NiCad NiMH LiPo L | eBay

 

[Papa_Lazarou]

Does the Reo Grand VV have this feature? If so, you could consider that as an upgrade, since I'm assuming you like all other aspects of the Grand you have now. Not sure if that would restrict your coil choices.