The CDC boosting discharges the pack sligthly, less than one minute. It aint volt controlled, I think it's around 100 milliamps it discharge. Afterwards it repeak, thus warming up the pack.
It solely intended for waking up a pack, which already is fully charged AND cooled completely down.
I've tried it several times, both with NiCd and GP3300. I charged at home and boosted at the track. I dont like it, the pack feels lazy.
Buttom line: Nothing beats a straight full charge, from completely dicharged all the way up till peak.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250