The self-discharge rate indicated by the manufacturer is 20% over 12 months. This is unverifiable by the user but if this is true (which I think is in the field of probable), combined with a capacity of 800mAh, while the base models are only 700mAh, after 12 months is obtained a residual capacity quite interesting. I just pity that the manufacturer does not indicate is the date of the initial charge because if the blister stayed a bit long in the rack, you may end up with a less than expected battery charged for immediate use. The purchase price is a bit high but quality has a price and if you use that requires flawless performance, this price can be justified. I tested these batteries in a headlamp LED, the power of the lighting was up to my expectations allowing me to properly illuminate the walls of an underground cavity somewhat important. Few hours of use has not made me note of significant decline in performance. This is a battery pack fully reliable and efficient for a slightly heavy use. Only 2 little earlier remarks made me remove my appreciation 1 star but the product is still excellent.
