Replace the battery of a Suunto D4 / Suunto D4i / Suunto D4f dive computer by following the steps in this video. Other Suunto computers are essentially the same steps as well, just with different screwdriver size and battery sizes. Please note that opening your dive computer performing the battery replacement by yourself will void the warranty if it still has the manufacturer's warranty.

*See pinned comments regarding using LESS grease on the o-ring, others have pointed out that using too much can lead to a leak. I've personally never had issues over a few battery changes like this but please take the knowledge from others into account.*

Timecodes
0:00 | Intro & Warning that changing the battery yourself will VOID your warranty
0:52 | Tools and materials needed to change your Sunnto D4 / D4i / D4f battery
2:32 | Removing the back case of the dive computer
3:42 | Removing the old battery and installing the new battery
4:25 | Removing the old oring
5:10 | Greasing the new o-ring (Note: Less grease, see pinned comment)
6:04 | Clean up dust and add the new o-ring
6:33 | Closing up the back casing
7:53 | Replacement of the battery complete, make sure it turns on clearly.
7:58 | Minor differences between the D4 and D4i battery change
9:05 | Outro

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