I have a motley collection of small action cameras. Most of the time, I use them to capture in-flight video with my RC aircraft. I stopped using some of these cameras as they developed problems and annoyances over time. I finally decided to address each of the issues and get all of my dusty gear up and running again. This required me to perform some repairs and a few upgrades. I'll show you how I cracked open these little cameras and got them back into service.
Mobius Battery Replacement
One of my Mobius cameras had developed very short battery life. A fully-charged battery would last only a few minutes. I opened up the case to have a look. The 2-piece case is attached with tiny Phillips screws in the front and plastic latches in the rear.
The Mobius is powered by a single LiPo battery. Dead (or dying) LiPo cells will often swell up like a balloon, but this one had no obvious physical defects. I detached the power connector from the camera PCB and charged the battery on one of my hobby-grade LiPo chargers. This allowed me to rule out any problems with the camera's built-in USB charging circuitry. My run time results were still way below normal, so I was confident that I had a dud battery.
I ordered a replacement battery from Buy Mobius for $7. Both of my Mobius cameras are from an early production batch and were equipped with 520mAh batteries. The factory later switched to 820mAh cells for longer run time. My replacement battery is the 820mAh variety. The newer battery has almost the exact same footprint as my original. It's just a little thicker.
The stock battery was held in place with a small square of double-sided tape. I was able to pry up the battery with my finger using gentle pressure. Even the tape was salvageable. The new battery fit into the same spot without any modifications. Since the replacement battery has the appropriate power connector, I was able to simply plug it in and the swap was complete. This cheap, quick fix gave me a brand new battery with more than 50% greater capacity than the original. But I wasn't finished just yet.