Battery Adapter 3x AA rechargeable
cults3d
This Adapter replaces 3x AA Batteries and fits for cheap LED light chain. I use a 18650 Lio Battery with a Step-up / Charger Board. (I desolder the big USB connector because of easier glue attachment, than the two ground pads must be bridged !) That gives 5V output and with a Diode in row it drop down to ca. 4,5V Don't forget to solder a knob to the + pole sheet to get contact. What you need: 2 pieces of copper foil or sheet controller board (from ebay) diode (1N4004 or similar) wires glue soldering iron
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