The rate of self-discharge is also heavily dependent on temperature. The hotter a given battery is, the quicker it will self-discharge. Most lithium-ion batteries have a self-discharge rate of between 5 and 10% per month. This means that a fully charged battery will lose between 5 and 10% of its charge per month.
If you really wanna look at discharge rates of bateries more then checkout this link
https://batteryuniversity.com/article/bu-802b-what-does-elevated-self-discharge-do