What kind of battery's should I use for a
smok tfv4??
That's a tank. That shouldn't need to play any role into the battery you use.
Your battery choice depends upon the mod you are using. Mech or regulated?
I'm going to assume that you are using a regulated mod. With a regulated mod, coil resistance is irrelevant. The battery you choose depends upon the watts you will be
vaping at.
In the interests of keeping things simple:
If you use a good quality 20 amp CDR battery like the Samsung 30Q or the LG HG2 then you are good for 60 watts per battery. If using a 2-battery regulated mod, your good for 120 watts as you have two batteries. If you are using a 3-battery mod, you're good for 180.
If you use a single 30 amp CDR battery like the LG HB6 you are good up to 90 watts; with a pair of 30 amp CDR batteries you could safely do 180 watts.
30W-60W:
LG 18650HG2 3000mah 20 amp CDR
LG 18650HE2 2500 mah 20 amp CDR
Samsung 18650 30Q, 3000 mah 20 amp CDR
Samsung 18650-25R, 2500 mah 20 amp CDR
Sony 18659VTC6 3000mAh 20A CDR
Sony 18650VTC5, 2600 mah 20 amp CDR
Sony 18650VTC4, 2100 mah 23 amp CDR
AW 18650 3000 mah 20 amp CDR
30W - 75W:
Sony 18650VTC5A, 2500 mah 25 amp CDR
60W or higher:
LG18650HB6 1500mah 30 amp CDR
LG18650HB2 1500mAh 30 amp CDR
LG18650HB4 1500mAh 30 amp CDR
Samsung 18650 30Q, 3000 mah 20 amp CDR
AW 18650 3000 mah 20 amp CDR
Sony 18659VTC6 3000mAh 20A CDR
LG 18650HG2 3000mah 20 amp CDR
Sony 18650VTC5, 2600 mah 20 amp CDR
LG 18650HE4 2500 mah 20 amp CDR
Samsung 18650-25R, 2500 mah 20 amp CDR
(there is a blue wrapped 25R with identical specs)
Sony 18650VTC5A, 2500 mah 25 amp CDR
Sony 18650VTC4, 2100 mah 23 amp CDR
LG18650HB6 1500mah 30 amp CDR
LG18650HB2 1500mAh 30 amp CDR
LG18650HB4 1500mAh 30 amp CDR
Sony 18650VTC3 1500mAh 30 amp CDR
I recommend you limit your choices to the above AW, Lg, Samsung, or Sony batteries. Aftermarket batteries often exaggerate their battery specs. Stick with the "Big Three" battery manufacturers.
Once you've decided upon what amp battery you need, then choose among those with the most capacity (mah).