Meilan M3 GPS Bicycle Speedometer internal lithium battery replacement

Here's our repurposed video to show how to replace the Meilan M3 GPS internal lithium battery. Apologise for the low HD quality as we shot this intended for 9:16 shorts. Hope it'll be more useful and searchable in our regular video section.
Soldering required and process is destructive as you'll need to glue back the casing.