Reddit reviews uxcell Power Supply DC 3.7V 1800mAh 654060 Li-ion Rechargeable Lithium Polymer Li-Po Battery
We found 1 Reddit comments about uxcell Power Supply DC 3.7V 1800mAh 654060 Li-ion Rechargeable Lithium Polymer Li-Po Battery. Here are the top ones, ranked by their Reddit score.
Here's a few pictures of the battery.
For instance, a quick search shows this candidate 1800mAh battery, but it's almost 3mm thicker than the existing battery (and would need a new connector). That's probably enough extra bulk that we would need to 3D print a new back cover or find a different attachment solution.
If you find a better alternative, I'd be interested!