maybe, but in my case there is probably nothing better because generally I try to install LEDs in small car models (1:24 scale) as lighting controlled by the D1 Mini module via a webserver.. and generally I have a limited amount of space.. I used old batteries from phones earlier, but currently I try to use 13350 batteries from used disposable e-cigarettes. of course, in e-cigarettes, apart from 13350 batteries, there are also Li-poly batteries which are also suitable. well, generally it is known that it will not work for long, but for demonstration purposes it is suitable