I have three 25R's bought from Illumination Supply. In the middle picture above, the left battery has three vent slots on the positive button and the batt on the right has four. Mine all have three. I suspect the battery on the right is a counterfeit because of this.
This would be the first time I've seen a counterfeit 25R and I would not use it for vaping. We know that counterfeit VTC4 and 5 are typically LG HE2 or Samsung 25R so they should at least be safe, assuming the counterfeiter didn't get really greedy and use cheaper batteries!
You have a Sigelei 150W with builds around .3-.15 ohms. The resistance doesn't matter when your running variable watts. 25 watts draws the same amps form the battery at 2 ohms as at 0.2 ohms. What wattage are you vaping at? From the Steam Engine battery drain calculator, 40 watts at a battery voltage of 4.2V draws 10.6A and 40 watts at 3.2V draws 13.9A.
