No "use by" date code. Most are dead or leaking. There is no warrantee if it destroys your device. Don't waste your money !
These Batteries Die Hard, and the price was excellent, and with the bonus points, unbelievably good. Run do not walk to your nearest Sears Hardware Store.
These batteries were bought to use for my remote tv control and will display low battery in 2 weeks time went through 12 batteries and all do the same in like less than 2 weeks time. GARBAGE