Originally Posted by
mrnizzles
with 2s packs, I can share them with 1/10 scale... (not sure why this is 'bad' to do .. never heard of that.. ) where as a single pack you can't. so that's the cost savings I was thinking of, not so much the cost of a single pack comparison, but the total amount you would need to race at the track. Currently I have 6 2s packs, and I have run them in my friends 1/10 scale cars no prob.
I never really considered that people 'forgetting' about charging their packs... most people seem pretty good about monitoring their chargers in case of a fire.
_
The bad part about using 2S packs is having them not age together. If you use them in other cars, each pack is probably not getting stressed the same and you will end up with a pack that is stronger or weaker. The main problem with this is how the LVC works on an ESC. They don't look at individual cells and only look at overall pack voltage. If you have a weak pack or a pack that didn't get fully charged (yes this happens for a number of reasons) you can run the weak pack well below cutoff before the overall system voltage triggers the LVC. This will destroy that pack. If you are only racing for 5 minute races, this isn't too much of a risk since you should never be anywhere near cutoff.
To do this correctly, you should always use two packs together so they stay as matched as possible. Hyperion dual chargers have a mode where they will charge two packs as a single matched pack (the balancer will equalize both packs as a single pack). The electronics companies would also have to make ESC's that have dual cutoff circuits that plug into the balance taps of the 2S packs.