The H-Priv though it claims 220watts, it is hype, as there are no 18650 batteries that can handle full output, amps increase as the battery charge decreases.
220watts/6.4volts (3.2volts lowest charge per battery)=34.375/90% mod chipset efficiency=38.19444_ final amps (no battery can hold this amp load continuously, maybe for 1 second but that is it, battery shifts down to CDR)
220watts/7.1volts (3.55volts lowest charge per battery)=30.9859/90% mod chipset efficiency=34.4288 final amps (again, not even the Sony VTC3 1600mah, or LG HB2/HB4/HB6 1500mah true 30amp CDR batteries can handle this mod safely at full output)
Full 30amps that will run safely at 220watts you would not a full useful charge with it, by Ohm's Law, 220watts @ 30amps Continuous = 7.33volts lowest combined battery voltage at 0.24ohms.
Kooper Primus on the other hand being 3x battery series
300watts/9.6v (3.2v per battery)=31.25/90%=34.722222_ final amps
300watts/9.9v (3.3v per battery)=30.3030/90%=33.67 final amps
300watts/10.2v (3.4v per battery)=29.4118/90%=32.6797 final amps
300watts/10.5v (3.5v per battery)=28.5174/90%=31.746 final amps
300watts/10.8v (3.6v per battery)=27.7778/90%=30.8642 final amps
To get full 300watts @ 30amps CDR the battery cut off would need to be 10v and a resistance of 0.33ohms
Personally IMO to reach potential 220watts or higher with current battery technology with 18650 batteries, or at least do it safely. 220watts the H-Priv should have been a triple batteries series configuration, the Kooper Primus to get to 300watts it needs 4x batteries in series or a 2 set of dual battery series with the two sleds combined in parallel. Shift down from 6th and 5th gear to normal street 4th gear for now, research the devices and batteries better before making your purchase and getting yourself into trouble. If you are also following the hype of batteries offered by such companies such as Efest (biggest offender of over speccing their re-wrapped batteries), IMRen, Basen, Eizfan or any other battery company other than real manufacturers everyone buys from (these are Sony, LG, and Samsung), no one makes a 35, 40, 45, 50 amp Continuous Discharge Rated 18650, the 4 highest are the Sony VTC3, and the LG HB Series (HB2/HB4/HB6), all other companies buy up mostly the B and C bin discards that didn't pass authentic muster for Sony, LG, or Samsung to slap their own label on. Basic rule of thumb at the moment, to get CDR amps you have to sacrifice Mah and run time, to get Mah and run time you have to sacrifice amps and CDR.
Link in my signature has listings of the most trusted batteries on the market by application, also check out
@Mooch and
@Baditude 's blogs, they have a bunch of valuable information as well.
Not trying to make a scare here, but seriously be safe out there, those two mods could be potentially dangerous, especially being released this close to the Aug 8 FDA Deeming Regulations deadline, makes me worry they have not been tested properly, that is a lot of power.