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Sigelei 150w TC

Hi, I recently purchased the Sigelei 150w box and LG HE2 2500mAh 35A 3.7v rechargeable Flat Top batteries. I plan to vape at the lowest, .2 ohms. Did I make a good selection on batteries?
 

robot zombie

Silver Contributor
Member For 4 Years
Yes, those are great batteries. They're actually only 20-amp batteries, though. The 35-amp rating is for pulse discharge, which isn't really meaningful - there's no standard for pulse ratings, so they can mean whatever the manufacturer wants them to. Don't use that number. Still, they are very good 20-amp batteries. They will generally perform well in that box.

However, I noticed you mentioned resistance. Resistance doesn't factor into battery drain on a regulated device. To put it simply, the device will pull whatever it needs to generate the amount of wattage you set it at straight from the batteries. On the input end of the circuit, watts are watts. There is no resistance until you get to the output circuit, which sort of operates independently of the one pulling power from your batteries.

For instance, in order for your device to power a coil at 100w, your batteries will need to generate 100w (plus a little extra that is needed to power the circuitry), which on fresh batteries kicking out 8.4v, would be roughly 13 odd amps of current.

Now, say you have a .1 coil on the other side. In order to power that to 100w, the Sigelei will need to feed it almost 32 amps of current, but will do so at a mere 3.16 volts. On the other hand, if you drop a .7 on there, it will need to provide only 14 amps of current, but will push it at a full 7.07 volts. In both cases, the device will still pull the same 13 amps at 8.4 volts from your batteries. The resistance only determines how it uses that power, not how much work your batteries will have to do.

The question you should be asking is "What wattage can I vape at with these batteries?" Unfortunately, as the voltage of your batteries drops, the Sigelei will take more current from them in order to generate the set wattage, so there's not really a straight answer. On a full charge, you can run it at the full 150w and pull 19 amps. But as the charge depletes, you will go well over your batteries' 20-amp limit. The highest setting at which you could run those batteries through a full charge cycle would be 100w.

TLDR; resistance doesn't matter to your batteries on a Sigelei 150w like it would on a mech. With 20-amp batteries, the highest power level you can safely run a coil of any resistance at is 100w. If you wish to vape anywhere upwards of 100w, then you will need to either get 30-amp batteries or change them out when they start reaching ~80%.
 
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