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I have both of the above models. Battery is ruined in one, the other is basically dead but the battery is good. They similar and battery has the same spec, anyone know if they’re interchangeable?

Sorry different enough you can’t swap. See for your self

A1708

A1706 MacBook Pro 13" Retina (Function Keys, Late 2016-2017) Battery and here’s the guide MacBook Pro 13" Function Keys Late 2016 Battery Replacement