We are talking facts here... TF / UF 14500 900mAh
batteries (No matter what color the wrapper is) are rated by the manufacturer as putting out a maximum
1.3 amps A Low Resistance 1.5 ohm atomizer @ 3.7v requires
2.47 amps of power. Right off the bat we see that the LR 1.5 ohm atty is attempting to draw close to DOUBLE the rated amps of the TF UF 14500 900mAh battery. Will it work? Yes.. Is it stressing the battery? Yes, VERY much. It is not good, and can be potentially dangerous.
I just happen to have a month old TrustFire 14500 900mAh 3.7v battery which was included in a mod purchase. I also have a AW IMR 14500 600mAh 3.7v high drain battery. I have a LR VaporKings 1.5 ohm atty, and a big honking Leo standard ohm cartomizer. To throw in the mix, I also have a BDL IMR 14500 600mAh 3.7v high drain battery. These are lower cost IMR batteries, which have a reputation of not performing well.
Let's test these out... (Click To Enlarge All Pics)
Using my Craftsman Digital MM, the VaporKing 1.5 ohm atty actually ohms in @ 1.7 ohms, and the Leo Standard Resistance carto @ 3.0 ohms.
ALL 3 batteries are fresh off of my Swiss design Pila charger, which is considered one of the best chargers available. Let's take an initial voltage reading with no load on the REO Mini using a voltmeter which also has a top atty connector to measure actual voltage under load.. (TrustFire / BDL / AW IMR)
Nothing unusual here.. All 3 batteries are around the same voltage with no load as they should be.
Now, let's take a reading with the VaporKings LR 510 atty to get a reading under load. These pics were all taken after a 5 second button press on the Mini....
Given the TrustFire has an amp output rating of only
1.3 amps, and is attempting to power the LR atty which is attempting to draw around
2.47 amps, this extreme voltage drop is to be expected, and is REALLY stressing the battery. This is a 3.7v battery sucked down to
3.40v fresh off the charger with only a 5 second button press. The BDL does not fare much better for being marketed as an IMR high drain battery. The AW IMR is supplying more than enough amperage, and maintains it's rated
3.7V.
Now, let's throw the 3.0 ohm standard resistance Leo carto on with a 5 second button press...
Again, all batteries are performing as expected. The 3.0 ohm Leo carto is well within the rated amp output of the TrustFire 14500. The TF is not stressed, and is maintaining a consistant
3.72v. The same is true with the BDL... Neither of these batteries are stressed, and are performing as designed. The AW IMR maintains a whopping
3.90v with the 3.0 ohm carto, and despite the TrustFire being rated @ 900mAh, the AW IMR will actually last longer, and supply a steady high amp output.
This is not smoke and mirrors folks... Many vendors are selling the voltmeters which include a connector for under load readings. Feel free to try the same tests yourself.. I guarantee you will get the same results..
