Pinout
2-pin JST battery connector pinout
Pins
- + (usually red wire)
- − (usually black wire)
- JST-PH (2.0mm pitch) is the common LiPo pack standard; JST-XH is a similar-looking 2.5mm pitch connector often used for balance leads — they are NOT interchangeable, check the pitch before mating
Specifications
| Contacts | 2 |
|---|---|
| JST-PH pitch | 2.0 mm |
| JST-PH rating | 2 A, 100 V |
| JST-XH pitch | 2.5 mm |
| JST-XH rating | 3 A, 250 V |
| Polarity | Not standardized, check before connecting |
| Typical pack | 1S LiPo, 3.7 V nominal, 4.2 V full |
| Higher current | XT30 or larger |
Notes
- The drawing follows the Adafruit / SparkFun convention: with the plug's metal windows facing you and the wires down, red (+) is on the left.
- Pack makers do not agree on which wire sits on which side of the housing, so a pack and a board that mate physically can still be wired reversed. Check with a meter before the first connection and swap the pins in the housing if needed.
- JST-PH contacts are rated around 2 A and JST-XH around 3 A: fine for small LiPo packs, too small for high-current ones (use a larger connector such as XT30 there).
