I have had the charging mat battery door installed since I bought my charge months ago. I found the battery life of the charge to be disappointing, but this being my first smart phone, I chalked it up to having a 4G phone.
I recently bought the dock, and have been charging my phone nightly, so I changed the battery door back to the factory door.
I am surprised to find that the battery lasts about 25% longer, and
the phone is significantly smaller and lighter.
I suppose the charging mat door creates some residual drain on the battery simply through capacitance.
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