The batteries were preloaded with sufficient voltage and have been proven to my satisfaction. A self-discharge was not noticeable for several weeks after purchase. The energy output was sufficiently long. The energy performance is comparable to the Varta "Ready 2 Use" batteries. For digital devices or cameras to buy in the future only more such batteries.
Addendum: After 1 year, no performance degradation, in spite even of accidental discharge. The power output at my camera wireless microphone is many times longer (about 3 hours) than the estimated by the equipment manufacturer battery life (45 minutes).