
Need help modifying a small USB rechargeable fan to use AA batteries or direct power
I have absolutely no expertise in electronics, so this might be a dumb question. I bought a small USB rechargeable handheld fan recently, but the battery only lasts around 20-22 minutes on a full charge. I opened it up and found it uses a single 14500 3.7V rechargeable battery.
I tried replacing it with a regular AA battery just to test it, but the fan didn’t work at all. I wanted to know if there’s a safe way to modify this so:
* it can run using AA batteries instead (would that even be a better option?), *or*
* it can work directly from a DC/wall power source without depending on the internal battery.