MXJO
IMRen
Efest
Currently these 3 battery suppliers are the notorious trio in my book, they buy B, C, and D rate cast off cells from Sony, Panasonic, Samsung, Sanyo, and LG, so you never really know what cell is underneath the re-wrap then they re-spec the battery higher than what it really is, MXJO's, you do not know if you are getting an LG HE4 20amp or a Panasonic 6amp underneath that wrapper, so we most times guess and be fair they are using the LG 20amp, but still don't trust them. 2nd, unless you are buying batteries that Amazon themself store in a warehouse, "DON'T BUY BATTERIES OFF AMAZON, EBAY, OR OTHER SUCH VENDOR THAT LETS NONAME NON-REPUTABLE" vendors sell off clones that can not even be classified as sub-par, but well below safe. 3rd, buy name brand batteries from manufacturers that actually make the cells everyone else buys and re-wraps, LG, Samsung, Sony, etc listed previously. 4th buy batteries from reputable, authorized re-sellers/retailers...
There are no batteries presently that have a Continuous Discharge Rate of over 30amps, any battery that say 35 or 40amps are actually 20amp batteries with a 35 or 40amp pulse rating, and you should never bank on a pulse rating, always bank on the CDR
15 to 20amp batteries
LG HG2
Samsung 30Q
20amp batteries
Samsung 25R
LG HE2/HE4
Sony VTC5
30amp or can sustain 30amps
Sony VTC4 (not a true 30amp but can sustain 30amps)
Sony VTC3 (true 30amp)
LG HB6 (true 30amp)
US Reputable Authorized Resellers
Liion Wholesale
Illumination Supply
IMRBatteries
RTDVapor
Orbtronics
Take some time to check out the blogs of
@Baditude and
@Mooch, they both have great battery information to read over, Mooch has great, independent test results he's conducted
Stay safe out there.