Personally, I think it's impossible. Since the discharge deck of lithium batteries is usually set between 3.0 and 4.2 V (usually written 3.7), the voltage is an integer multiple of this range, for example 6.0-8 ,4 (usually written 7.4), 9.0-12.4 (usually written 7.4). like 11.2). Outside of this range, lithium batteries are dangerous, prone to fire, and will have a significantly reduced lifespan.
-------------------------------------------- ----- ---------
I am a lithium battery engineer. If you have any questions, do not hesitate to leave a message on my space or my blog.