Super Capacitor To Battery Adaptor
thingiverse
## Super Capacitor to 18650 Adaptor This print transforms a [3.8V 500F Super Capacitor](https://www.aliexpress.com/item/1005002965764274.html?spm=a2g0o.ppclist.product.2.51a8YFGqYFGqxZ&pdp_npi=2%40dis%21GBP%21%EF%BF%A11.23%21%EF%BF%A11.23%21%21%21%21%21%40211b5e2416606791426856403e08c4%2112000022995017013%21btf&_t=pvid:5a64bfb1-1600-478c-8388-a8e76b1fe819&afTraceInfo=1005002965764274__pc__pcBridgePPC__xxxxxx__1660679143) to 18650 battery size and can be used in normal 18650 shields. 18650 battery charging voltage is 4.2v, greater than the nominal voltage, so if charging too long it will impact the working life of the super capacity. However I tested charging over 1 hour and voltage over 3.9v, it still working fine. This 3.8V 500F SuperCap is a Lithium-ion capacitor, its recommended working voltage is from about 2.6V - 3.8V. Then the equivalent capacity is about 160 mAh, very small compared to the 18650 battery. This is just for fun. However, the supercapacitor is more env friendly and longer working life. I believe it can be a good Li-Po battery alternative for some IoT projects.
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