How high (%) is self-discharge with regard to the rechargeable battery type?
NI-MH batteries are known to lose their charge the quickest. Within 2-3 days they will lose approx. 10% of their power, continuing at a loss rate of 1-2% per day depending on the surrounding ambient temperature. (higher temperatures promote greater self-discharge). Li-Ion batteries are unbeatable, with a maximum self-discharge loss of 10% per month at a storage temperature of 20 C – even less if the temperature is lower.