Again and again we are asked how we provide the HelTec boards on the road, since they have a charging controller with a plug onBoard. Today we want to show briefly what we are helping. We've taken a LiIon cell from a battery pack of a defective cordless screwdriver, this one with our TP4056 loaded and then operated our LoRa-Dev-Board.
First of all, we lightly roughened the cell at the contact surfaces and coated with "Löthonig" ... this can be easily produced with colophony and isopropanol.
Afterwards, we were able to easily 1,25mm JST Solder plug. This is what we have Amazon We do not currently have to offer these in the online shop due to lack of demand. We have soldered the bushings with our loading egler:
Subsequently, we wound the cell with insulating tape due to lack of heat-shrinkable tubing in order to avoid tearing off the thin dunches.