Two pin JST connector to a 2.1x 5.5mm barrel jack, 6.25 inch long jumper cable. We use this cable to adapt from a wall power supply to a relatively small, SMD JST connector. We found that many of the SMD connectors used for battery charging were too large or were not capable of through-putting the current we wanted for faster charging. This setup, with a SMD JST connector and wall power supply, can handle up to 2A!
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I don't have much to say about this. It'd be hard to do too much wrong here. If you need to thread it through a small hole, the JST header can be removed by folding back the springs on the individual pins.