🔋 Battery Self-Discharge

Ever changed a re-chargeable battery with one you know is charged only to find it to be nearly dead? I have! I keep a small box of rechargeable batteries, various sizes and chemistry, all ready to go. Batteries only ever get put in the box once they are charged. The trouble is that batteries self-discharge. For primary cells (aka non-rechargeable) the process happens over many years, for…