don't think ill get a ton of pics i did set it to hi resolution or whatever it is.
You should be fine for at least 4 weeks, and you really should get 6 weeks out of it, if you're not getting hundreds of pictures every day. Get a good battery tester if you don't have one, since the camera has nothing to tell you the condition of the batteries. When my battery tester shows them at 40%, I replace them. I've found that when they get that low, the camera will just shut itself off randomly and you won't know it, until you check it a couple weeks later and get only a couple pictures.

By the way, I don't throw away those used batteries, I keep them for flashlights. They still work fine for that.
Oh, and you definitely want to run those Tasco cameras on high resolution all the time. Otherwise you probably won't be happy with the pictures.