Jeep Repair: battery going dead, jeep grand cherokee, amp meter

Question
I have a 98 Jeep Grand Cherokee and my battery goes dead about every 2-3days if i dont charge it why is this?

And now i just replaced the water pump and it ran fine for about a day now it wont start it turns over but it wont start any ideas why?

Thank you

Answer
I can help u on the batty  drain   U need to perform a battery off draw test with an amp meter  if u dont have one able to go down to 10MA  then I would suggest taking it to a shop to let them mess with it  as for the no start recheck the work u performed.