You'll shorten the life of your battery packs by charging them that fast, but if that's how you want to charge your packs then it sounds like that charger will do it. Read the comments though. One thing I can assure you of is that even though the seventh comment calls it a "GREAT ALL AROUND CHARGER", it's definitely not an all around charger in any sense. It appears to be targeted toward r/c model cars. That page has a link for more information
, but it's dead, suggesting that the product may be discontinued.