The Galaxy S8 gets its worldwide release this Friday, and reviews for the device are excellent. Barring the mysterious red tint issue experienced by some South Korean early owners, it looks to be Samsung’s most impressive smartphone to date, with many calling it the best Android device you can buy. As is the tradition with new gadgets, iFixit has performed one of its famous teardowns on both the S8 and S8+.

Much like the handsets’ predecessor, the S7 Edge, the flagship phones may be fantastic devices but repairing them is no easy feat. Both get a repairability score of 4/10; a small improvement over the S7 Edge’s 3/10.

The only positive point iFixit could find with both phones is that they contain many components that are modular and can be replaced independently. The battery, however, is not one of them.

Considering what happened with the Note 7, it’s somewhat surprising that technicians would find it difficult to remove the S8/S8+’s batteries due to the strong adhesive and glued-on rear panel. The iFixit team also discovered that the battery in the S8 Plus uses almost the same design as the one found in the Note 7, though it will have doubtlessly gone through extensive, improved testing procedures. It even has the same capacity of 3,500 mAh at 3.85 V (13.48 Wh).

With strong adhesive used on both the front and back of both phones, getting inside them is far from simple. Additionally, because the front screen is curved, replacing the glass is extremely difficult without destroying the display.

Check out the full teardown of the Galaxy S8 and S8+ on iFixit.