Why isn't battery polarity always the same in JST pins?


#1

I’ve seen batteries with JST connector with the positive (red) on the right side:

And some others with positive (red) on the left side:
https://www.sparkfun.com/products/retired/8483

Why isn’t battery polarity always the same in JST pins?


#2

There’s no standard for it. That battery looks to be reversed.

Particle, Sparkfun and Adafruit use the same polarity on the JST-PH connector.

On the battery side, with the key facing up, and the holes facing you, the right side is +.


#3

Note that you can swap polarity if you’re careful - use a sharp tool to lift up the plastic latch (underside on the photo above) and the wire will pull out. Pull one out, insulate it, then pull the other out, and swap them over.