This is the scale we have and I just love it! Goes up to 7,000 grams but still can weigh my itty bitty crested gecko and those lovely small bp hatchlings. I'd highly recommend it.

http://www.reptilebasics.com/product...cat=258&page=1

We don't have the AC adaptor but quite honestly the thing just doesn't eat through batteries all that quickly. I love the "hold" function so you can remove and put the snake away and not lose the reading while you're doing that....very handy!