Yes, we are talking about the same lens for the same drone. The battery change is of the M2 battery. You can't just leave the anamorphic lens permanently attached. You have to uninstall it upon landing, and reinstall it on a live gimbal before every single flight, wasting 2 minutes of precious battery life, as the drone cannot be properly powered up with the anamorphic lens already mounted. There is also significant additional work required in post to make use of the anamorphic footage. None of these issues are fully disclosed until you receive the lens, and then Moment's draconian return process almost guarantees you can't get a refund, when you discover the horror of your purchase!
Do the results justify the risks and hassle of using it? DJI certainly won't cover your gimbal when the Moment anamorphic lens ruins it!