I use disposable batteries in my LED flashlights because they tend to last two or more years in there, compared to rechargeable batteries that have a faster self discharge rate then that so I buy a box of 12 D cells at a time having that box last 3-4 years, I do the same with the "AA" batteries for my bike light, again a box of 16 batteries last 3-4 years, multi meter battery is a 9V that tends to last 5 years, cordless drill is Lithium rechargeable, electric bicycle is Lithium as well, electric car is lead acid deep cycle, forklift at work is lead acid deep cycle, lap top is Lithium, same with cell phone.
I have a box of NiCad rechargeable batteries that I no longer use because of their self discharge being almost as fast as disposable batteries going dead with use in my LED lights.
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