The capacity of each battery varies, but still higher than the 1900 mAh announced. On 20 Eneloop batteries charged (and loaded) slowly over a RS720 LaCrosse, I oscillate between 2.07 and 3.15 Ah. A charger of this type, moreover, allows the pair to avoid imbalances. Used in the making of its equipment (48v phantom power) they take more than supermarket batteries, even "mark" During the winter outings are rare. 6 months after their last charge, they remain equally operational and have lost almost nothing. To care for, a "smart" charger says is essential. Delivered already loaded. Often 2 shipments in iCell Limited.