First post on this board guys, got my first mechanical mod a week ago (Hcigar Kylin, clone of the Pisces T I believe). Using coils at 1.3-1.5 ohms with a few batteries (Efest red 18650, Sony VTC5's and AW IMR 18490). My question is on the Efest and AW batteries, 3.7 volts is stated. Is this the voltage supplied from a freshly charged battery? And also what voltage does a VTC5 give out on a fresh charge? I don't build lower than 1 ohm so I'm well within the safety for all the batteries I use as far as I know. Thanks!
Battery voltage in a mechanical mod
- Thread starter Haydenr25
- Start date
- th_trl_thread_readers 0
- Status
4.2 as stated above and I usually take mine down to about 3.4ish. With experience you will know what vapor production drops off and it's time to change batteries.
Do you have a multimeter or a volt meter. If not, I highly recommend one. It is usually 4.2 on a fresh charge, but you should be using a voltage meter to ensure you don't over drain your batteries. There is a noticeable voltage drop when they get down far enough, but until you learn what that feels like, it's best to occasionaly check with a meter.
I swap my battery out when the vapour diminishes. So all the batteries including the red Efest and AW give out 4.2 on a fresh charge?
4.2v is a fully charged battery at its peak working shape. It's the same for all 18650's regardless of brand. As it is used, it'll diminish in voltage. 3.7v is actually the median for battery. All your batteries are safe for 1ohm or greater coils. Make sure you never allow any of your batteries to drop below 3.2v. Any lower than this and it could make damage your battery, making it unchargeable. You'll definitely tell from the drop in flavor, warmth, and vapor production when your battery starts getting to that level.
For me, I normally charge my batteries when they've reached about 3.5v. I taste the difference and change them immediately.
For me, I normally charge my batteries when they've reached about 3.5v. I taste the difference and change them immediately.
No. They are charged for 4.2 volts, but there is a voltage drop off when you have a device connected to your mod. So say you have a freshly charged EFest battery in your mod and a 1 ohm coil. Usually you will receive 4.1 volts to the device with a 0.1 volt drop off. The best way to test is to buy an inline voltage meter to see the voltage drop on your mods and atomizers.
Yes... all should be around 4.2 on a fresh charge. If you charge a battery and you meter it and it won't charge close to 4.2, then the battery is close to the end of it's life cycle. A multimeter helps ensure your batteries are charging correctly and help prevent a charging mishap.
Any 3.7v battery should be close to 4.2.
And the only way to check voltage in a mech is to take the battery out or a inline voltage checker. A kick also has a low voltage cut-off if you want to use a kick.
yes, All batteries of the same chemistry but in different sizes/Mah (18650/18500/18490/18350) will put out the same voltage when freshly charged.
Other than that, I think people are confusing voltage drop of a specific mod/tank combo, and voltage drop under use. All mods will have a slight voltage drop simply because the current is going through all sorts of screw-on connections through the mechanical mod (top cap, bottom cap, the tube itself, then you're screwing in a tank onto a 510 connector and all those threads there as well). Most decent ones it's something super low like .02 volts which (regardless of what people say), you'll never notice.
The other aspect is voltage drop under load. Your battery on a multimeter might say 4.2 volts, but as soon as you actually use your mechanical mod e-cig and it pulls current from the battery when you're firing your coil, the battery voltage will drop, then rebound when you're not firing the mod. 3.7 bolts seems to be the "sweet spot" where the battery tends to linger for the majority of it's battery life (which you might see as a very slightly sloping plateau on a graph of the voltage of a battery as it is drained).
The Hcigar Kylin has a measured voltage drop of around .05v under load. That's very good, especially for a clone.
Since nobody bothered to post one, here is a voltage drop chart. This doesn't necessarily show your specific batteries, but it does show you how the current is depleted as you use your mod at different amp draws.
The Hcigar Kylin has a measured voltage drop of around .05v under load. That's very good, especially for a clone.
Since nobody bothered to post one, here is a voltage drop chart. This doesn't necessarily show your specific batteries, but it does show you how the current is depleted as you use your mod at different amp draws.
That chart is not about "voltage drop"
"voltage drop" is about the drop in voltage when under load.
the chart shown is about the drop in voltage of the battery due to discharge state of the battery.
I'm pretty .... about my batteries, so after 15 hard pulls from my Mech mods I pull the battery and test it. I vape builds in the .12 -.19 area on my Mechs I only use Sony VTC5 batteries. 2-3 second pulls I'm rite at the burst limit for that battery with the builds I vape, so I have started a box mod to house 2 26650 batteries parallel final termination will be direct connection to the battery so no 510 connector.
So I've been doing some testing today and here are my thoughts:
Battery voltage was measured at 4.07V. Using a 1.3ohm build on a kayfun. The battery I used was an Efest red 18650 2000mah cell. After some research on the internet I found it had an internal resistance of 0.11ohm. Using the battery voltage and my build, I got a figure of 3.13 amps running through my coil.
0.11 X 3.13 = 0.3443V dropped across the battery.
4.07V - 0.3443V = 3.7257V supplied to the battery without any voltage drop from my mod.
To test this, I put the probes on my positive and negative screws of my kayfun, using the same battery at that charge level. I measured 3.66V across the positive and negative of my kayfun.
3.7257V - 3.66V = 0.0657V dropped across my mod. The mech I own is a Hcigar Kylin (clone of the pisces T), silver plated contact pins. First time doing any tests on any mods so feel free to correct me anywhere and share your thoughts.
Battery voltage was measured at 4.07V. Using a 1.3ohm build on a kayfun. The battery I used was an Efest red 18650 2000mah cell. After some research on the internet I found it had an internal resistance of 0.11ohm. Using the battery voltage and my build, I got a figure of 3.13 amps running through my coil.
0.11 X 3.13 = 0.3443V dropped across the battery.
4.07V - 0.3443V = 3.7257V supplied to the battery without any voltage drop from my mod.
To test this, I put the probes on my positive and negative screws of my kayfun, using the same battery at that charge level. I measured 3.66V across the positive and negative of my kayfun.
3.7257V - 3.66V = 0.0657V dropped across my mod. The mech I own is a Hcigar Kylin (clone of the pisces T), silver plated contact pins. First time doing any tests on any mods so feel free to correct me anywhere and share your thoughts.
Measurements:
Battery EMF measured 4.07 volts.
Coil ohms = 1.3 ohms
Battery internal ohms = 0.11 ohms
Voltage across 1.3 ohm coil when connected = 3.66 volts
Calculation:
Current = 3.66 / 1.3 = 2.82 amps
V=IR:
4.07 = 2.82(1.3 + 0.11 + R)
1.44 = 1.41 + R
R = 0.03 ohms
You mod ohms is 0.03 ohms.
So to find that resistance value of 1.44 ohms you just divide the battery voltage by the amps flowing through the coil? Then just add up your internal battery resistance and coil resistance to get the difference, which is the mod resistance? Also, I'm guessing 0.03 ohms is pretty good for a clone?
Last edited:
- Status
Similar threads
- Locked
