They have a thing where you open a MC with them and receive a total of $50 off your first purchase. In the above link you’ll see where 6 packs of Tenergy 8000mAh LSD D cells would only be $49.99 which is almost half price ($40 off the regular price and then they say you get $10 off your first purchase). Not that I particularly need a MC but I’ll give it a try. I always pay my charges off before the time so I don’t get charged interest. I’ll let you know if it works.
Other than that, the 10% at Battery Junction is the best thing I’m seeing right now. Of course if anyone else has something better, please shout out.