1. 38X74
2. No battery from the factory - could be anything based on previous owner.
3. The measurement on the speaker cover is actually 5". On the outside, it has a flange that takes the overall dimension to approximately 6".
4. According to vendor, there are no weight limits on brackets. Different brackets will fit different TVs. If the TV fits, it's rated accordingly. We put backer in the walls according to the bracket we install.
Hope this helps.
PTM
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