Batteries all work perfectly and are brimming (have a battery meter to measure that). This 10 package is clearly preferable to the blister from the trade because you get 10 for the price of 6 here. These are supplied only in a plastic bag but that is irrelevant when you can save so much money. In addition, a small LED light for the keychain you get even for free, handy if you evening faces a dark door and the keyhole does not find.
