I'll be honest with you. I've tested everyone that I sell and their fully charge. The shelf life on these are great. I've never used anything other than these batteries for any of my equipment. I use them in my nightscopes-riflescopes and flashlights. I also sell them at gun shows by the dozen. If you take out the shipping cost. I'm charging around $1.67 for each battery. Shipping sucks, but fuel is only going up. The more you buy, the lower the cost of shipping. What you want is a battery that holds it's charge when not in used. All batteries discharge the same depens on equipment. But when your not using it is when bleeding occurs? What you're looking for is a battery that has a long shelf life. The battery will then hold its charged until it's call upon.
And just a thought. How many companies do you think make batteriers and put the different logos on them. Try about 4 compaines that make batteries and put your logo on them. Like Sears. They have never made a tool. They contract it out. Right now Roybi is one of the compaines making their power tools right now. Same with batteries or just about anything you buy. Hopes this helps answears your question?