Having the same problem. The battery drops form 84% down to 0%. When switched on again it could be 1%, 40% or 60% (more or less) I faced the problem when upgraded to 5.0.2 Everything was Ok with 4.4.4 Now the problem persists with 5.1.1 Rolled back to 4.4.4. - no problem. Even if soemthing's wrong with the battery why Android 5 behaves in this way?
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