Bangle.js 2 battery stuck at zero?

Although I can't see the percentage, the bangle has been on for several days without dying- I'd guess this is just an issue with the reported battery percentage.

E.getBattery() returns 0. It looks like D3 is returning a value much lower than expected. I polled it a number of times and observed that the value reported is out of the anticipated range. I'll check back after some time to see if this number is moving at all.

Logs below:

Connected to Web Bluetooth, Bangle.js 5b8f
>E.getBattery()
=0
>analogRead(D3)
=-0.0029296875
>analogRead(D3)
=-0.001953125
>analogRead(D3)
=-0.00317382812
>analogRead(D3)
=-0.00146484375
>analogRead(D3)
=-0.00415039062
>analogRead(D3)
=-0.00219726562
>analogRead(D3)
=-0.001953125
>analogRead(D3)
=-0.00366210937
>analogRead(D3)
=-0.001953125
>analogRead(D3)
=-0.00366210937
>analogRead(D3)
=-0.00366210937