They draw quite a bunch more. A few years ago 1500 mah was a big pack. I have an outstanding charger I was using for years, still using it too. Problem is batteries got better and better so these days 2000 or 2400 is about the norm. My old charger only goes up to 1500 though. I only mention this because I ended up having to buy a new charger for a lot of my packs. I have a couple packs that are 6v and 4800mah. My normal chargers can't bring them all the way up. Just another little thing to think about.