Well, the thing is that the two battery types (lithium and alkaline) can look very similiar. Look at the two batterys and determine (by the labeling), the type of battery.
1. Batteries are really low on juice.
2. i change them, camera doesnt turn on
3. i put old ones back in. it works.
4. i try 4 different sets of batteries and none work.
5. ac adapter doesnt work either.
6. old batteries still work
7. i dont use lithium ion