I would like to power my audiomoth using a rechargeable external battery. I have tried plugging an external battery into the USB port on the audiomoth but it won't draw power from it. Do I need to solder some kind of port onto the +/- on the circuit board? I have little to no experience with this kind of thing so I'd appreciate any advice.
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I've looked into some other possible options for extending the battery life of the audiomoth. Connecting an 8 cell battery holder in parallel with the existing battery pack would provide as much extra charge as a standard power bank if you filled it with eneloop pro rechargable batteries (2500 mAh per AA battery). The issue I anticipate there is that the original battery holder (3 AA batteries, ~4.5V) and the additional battery holder (8 AA batteries, ~12V) would have different voltages. If necessary, you could remove the original battery holder. Maybe even replace it with a second 8 cell battery holder to get an even longer life?
https://shopee.sg/%E2%98%80Plastic-8-X-1.5V-AA-2A-CELL-Battery-Holder-12V-With-Lead-Wire-i.102279399.2232330557
https://shopee.sg/-2019-Eneloop-Pro-AA-4pcs-Rechargeable-Battery-Panasonic-Made-in-Japan-i.16194072.272172741