i have been running one pack in a loaner 1/10th oval car. a friend bought them off of the cheapbatteries site and they were unmatched. i was given these EL4300's to use as a qual pack along with one IB3800 (qual), one IP3800 (qual), one IB4200 (main) to use as packs on the loaner. after the second week he asked me at a race what i thought of them?
i told him that i had been using them as a 2nd heat qual pack and i felt that out of them all they may be the strongest (punch/no fade) pack he gave me.
i ran it in the first heat so it can discharged and cooled down for a recharge for his third heat. he was impressed, he then mentioned he paid less than $16.00 for the unmatched pack, which surprized me.
so far between us we have put about 15 charges on ithe EL4300, so the point of fade hasn't been found out yet. he did try some of the EL3600's, those and didn't like them at all