Very fast question:
Can I use this charger:
Nitecore D2 Intelligent Digi Charger
For this batteries?
US18650VTC4 18650 3.7V 2100mAh Rechargeable Li - ion Battery 30A Discharge - 4 pcs
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Another fast question, if I buy this batteries:
3.7V 2500mAh 18650 Rechargeable Li-ion Battery ( INR18650 - 25R )
instead of the simply VTC4, what's the difference? Are that batteries ok too or I need to buy the VTC4?
I need to put the batteries in the smok r200 box (200wats mod).
Help!
Thank you.
1) The Nitecore line of chargers are highly suggested, good chargers with a great price point. They are trickle chargers, not rapid chargers so are very, very gentle on batteries, their charging algorithms condition the batteries to keep them peek performing for the longest possible time.
2) Regulated dual battery mods are an interesting breed of devices, don't worry about "Ohm's Law" learn "Watt's Law". Most are in series configuration (like a flash light with multiple batteries (+)___(-)(+)____(-) ), this doubles the available voltage, while keeping the CDR and Mah of a single cell, ie VTC4 in a series pair this would be 8.4v (4.2v X2), 20 to 30amp CDR, 2100mah full charge, to 6.4v (3.2v X2), 20 to 30amp CDR, 2100mah. So "Watt's Law" down and dirty for the max amps your R200 will pull would be
200watts/6.4v (lowest battery cutoff state most mods use)=31.25amps, fresh charge would be 200watts/8.4v=23.81amps
So suggested batteries for that application would be Sony VTC3, LG HB2, HB4, or HB6 being true 30amp CDR batteries, they sacrifice mah rating for current capability, the VTC4 is a 20amp CDR rated but can be wiggled to 30amps, in that application max the VTC4 would be safe to use is 180watts or so, the Samsung 25R is a strong battery, but is 20amps CDR, can only wiggle up to 25amps safely, this limits it into the 120 to 140watts max range. Link in my signature is to a blog I did about authentic A bin batteries and where they can run in wattage ranges, well worth a read to help you decide, also has break downs on chargers, and links to Authorized Authentic Resellers. Remember Panasonic/Sanyo, Sony, LG, and Samsung are the only true manufacturers of Lion battery cells in the US, do not trust other brands such as Efest, AWT, IMRen, Eizfan, Vappower, even Vamped or others that have on their labels of Amp limits higher than 30amps, 30amp True CDR has yet to be surpassed, only 4 true 30amp CDR batteries listed above on the market, the higher amp limit marks on re-wrap batteries are the pulse discharge ratings (PDR) which is a short pulse discharge of anywhere between 1/2 second to 2 seconds. Example IMRen Purple 3000mah 35amp Max Amps, those are the specs of an A Bin LG HG2 - 3000mah, 20amp CDR, 35amp PDR.
So figure out what your max watts you will ever run will be, then use Watt's Law to determine your daily batteries for you mod, but never exceed that wattage often.
