The easiest way to reduce the voltage is to use a 4007 rectifier to reduce the voltage. Just connect three in series, but the unstable effect is not very good. I can buy one online. The pressing module costs 2/3 yuan, which is very cheap and the effect is very good. Look at the photo, I use this kind of module.
How to change lithium battery from 3.75 volts to 1.5 volts
Introduction How to change lithium battery from 3.75 volts to 1.5 volts The easiest way to reduce the voltage is to use a 4007 rectifier to reduce the voltage. Just connect three in series.