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@trusktr are you dead set on battery power at this time, e.g. are you really at the development stage and will be writing code for the near future? If so, I would consider @Gordon suggestion of a dedicated supply to avoid the hassles with battery use. You will be thankful, we know this based on experience. Have you considered using a cell phone charger? I run my Espruino projects using a leftover 5v 800ma cell phone charger with a micro USB plug on the end, which I plug into a micro USB receptacle whose pins fit nicely into the solderless breadboard. Mine has been running non-stop for three months now for just pennies to the all mighty power company. My 0.02 worth.
EDIT:
I make this suggestion as the picture above (#13) shows the battery with a rating of 600mAhr Running WiFi continuously, say 300ma, will only provide a max of two hours of use. Much less with other attached devices, and remember actual mileage will vary. . . .
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Robin
@trusktr
@Gordon Thanks! That helped a lot.
The battery I pictured above has that same (JST PHR2) connector, and says 3.6v. Would that one work then?
If the battery is fully charged (and is above 3.6v), could that break (burn) the espruino? Should I get a voltmeter to check before wiring it up?
If I get that battery, would the white JST PHR2 connector fit onto the GND/VUSB pins directly?
As for the separate power supply option, which does sound best based on what you describe,
Would I need to fork the black wire to two wires (like a snake tongue) and connect to both pins, one on each board?
Just to confirm, this is to the 3.3v pin (which the schematic calls "3.3v output"), NOT the VUSB pin?