A four percent drain in two days does not seem unreasonable. Is this for both batteries or one? A battery will not stay at 100% even when not in use.
Really? Because none on our Latitude E series or Thinkpads do this. The battery level stays exactly where it was powered down after a week or so. I do understand there are some drain but only see that when the laptops are left untouched for several weeks.
The drain is random in that sometimes it's #1, sometimes it's #2 and other times it's both. Like over last night, #2 went down 4% while #1 remained at 100% after ~ 14 hrs.