I use them to modify 1s lipos for multirotors. The batteries were Jst 2.0 so I removed them and will solder Jst 1.25. They work great. The straight 1.25mm connectors are a bit loose. A little heat shrink tubing will fix that though. It's not a big deal, but it's worth adding something good for the cable's durability. I noticed that several areas were not evenly covered with insulation. However, this is rare and these are small wires, so it doesn't matter. The connectors fit together snugly but not too tight as you risk breaking the solder joint. All in all, this is a good base for any desired application.
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