OK so this is strange to me. I bought a brand new Samsung 25r and tried to vape it on my joyetech evic vtwo mini topped with the Vaporesso Nalu RDA with prebuilt .52 ohm dual Clapton coils fully charged but it won't vape any higher than 60 watts. However I have no issue vaping said setup only with Sony vtc6 at 75 watts for quite an extended period of time. My Samsung 25r has no issue running my twisted messes squared RDA with .15 ohm dual parallel coils at 75 watts. This is weird and a first for me if anyone could help. On the nalu claptons the 25r can't push higher than 10.5 amps roughly but on the tm dual parallels it can push 21 amps. Nalu at 75 watts it runs 6.24 volts idk if that is info needed. Any help appreciated thank you!
First you shouldn't be pushing any 20amp CDR battery past 60 to 65watts per battery continuously, especially at lower charge on the batteries.
60watts/3.2v lowest battery charge/90% Mod Efficiency Rating=20.83333Amps
65watts/3.2v/90%=22.5694444Amps
Remember that what the Joyetech control boards display as amps are the amps being pushed to the coil(s) themselves, not what is being pulled from the batteries
6.24v/0.52ohms=12amps
0.15ohms at 75watts = 3.35v and 22.36amps needed
The Sony VTC6 holding higher watts longer than the 25R is not surprising as Sony batteries, especially the 20amp VTC6 and the 25amp VTC5A are notorious for holding onto their voltage longer than other company batteries and they have a stronger pulse discharge than other company batteries making them the hardest hitting line on the market, especially in the Mech/Unregulated aspect. Comparing an Orange to a Tangelo or Tangerine in regards to different performances, the VTC5A even knocks the venerable 30amp LG HB6's face into the dirt in pulse and harder hitting categories with less voltage sag and a slower discharge curve. Thus why for the longest time the Sony VTC4 23amp battery which could be wiggled up to 28amps easily and safely was one of, if not, the King of High amp vaping for the longest until the LG HB series hit the market followed by the recently released VTC5A revamp of the VTC5.
guidlines that are a bit dumbed down:
20amp batteries = 60watts max per battery (120 dual battery series, 180 triple battery series, 240 quad battery series) in regulated mods, unregulated/mech lowest safest ohms of 0.28 (15amps), though suggested 0.42 (10amps)
25amp batteries = 75watts max per battery regulated, unregulated/mech lowest safest ohms 0.22 (18.75amps), though suggested 0.34 (12.5amps)
30amp batteries = 90watts max per battery regulated, unregulated/mech lowest safest ohms 0.19 (22.5amps), suggested 0.28ohms (15amps)
Its in the "Ohm's Law", no way to get around it in electricty
http://www.steam-engine.org/ohm.html