m5stack
M5DIal Battery port
What connector does the M5Dial's battery port use? This would be the one inside, below the M5Stamp
I've seen speculation (https://old.reddit.com/r/M5Stack/comments/18ppxmr/what_kind_of_battery_plug_does_the_m5_dial_use/), but when I purchased JST-ZH (https://a.co/d/h6YO8UD) and JST-SH (https://a.co/d/5xiDnRJ), neither fit (one slightly too big, one slightly too small). I haven't seen it documented (http://docs.m5stack.com/en/core/M5Dial) or on their forums. I'm looking for an official, or tested answer, since all I've seen is speculation.
As JST-ZH (1.5mm) is to big and JST-SH (1mm) to small - i would guess it is a JST-GH (1.25mm) connector: https://en.wikipedia.org/wiki/JST_connector
The above is untested and only more speculation 😁
But I'm quite confident as for example this panel also uses the JST-GH for battery: https://www.lilygo.cc/products/t-rgb (and to me it looks exactly the same)
I could have made the same speculation, which is why I'm asking for tested, confirmed, or official word on what it is before I move forward with further purchases.
If this is still of interest: The right connector is the JST-GH 1.25mm 2PIN Tested and used by myself. By the way: @M5Stack-Support: Your help here on github is needed!!! The M5Dial as a piece of hardware is great, but the documentation and the software-support really needs to be improved!!!
Thank you @wichjan finally found a place that stock them. Could you please share what battery you use for the device? and how did you know what battery to use?
Is the voltage also between 6 and 36 for that connector?
Hi DevDianDankie,
this port is only suitable for single cell Lithium-Ion/LithiumPolymer batteries (1S-LiIon/LiPo) with the nominal voltage of 3.7 V (max at full charge 4.2V), as the port is directly connected to a LiPo-charging circuit around the TP4057 chip. You can see this in the hardware schematics provided by m5Stack in the docs-section.
The connector is not capable for 6–36 V!! This will damage the hardware.
I am using a Lipo-battery with 500mAh capacity. You can find such everywhere from ebay to aliexpress, mouser, digikey etc.
They look like this:
Perfect answer thank you @wichjan.
Unfortunately for me I can not interpret those schematics just yet so mucho tnx for your detailed response!
@wichjan my board has a "B+" printed on it. Should I assume that this is the battery polarity? If so it looks like the JST GH connector needs to be installed upside down (black on the B+ side).
Right. »B+« is the plus pole of the battery. There is no standard amongst the battery manufacturers, so you will find batteries with the red (+) and black (-) wires on either side of the JST connector.
So you may need to swap the red and black wires, so that the result looks like this: