(16) Acuvar High Capacity AA Rechargeable Batteries 3100mAh NiMH, Precharged

They are a high capacity battery cell, and being of a Nickel Metal hydride type, they do have a slightly lower Potential/voltage, however in most devices they will work fine, and in some applications, such as replacing lead acid cells as I did with some Quantum "Battery2", "Battery ", and another model, as a pair to get the right voltage, they are ideal and last longer than the originals due to a higher milliAmp/Hour rating.

Item arrived 3 days before the scheduled delivery day. The batteries were not pre-charged. The batteries charged up without issue in the 6-14 hour charge time for my battery charger. My tester indicated the batteries were at full charge and the batteries have held the charge. I have not had an opportunity to use the batteries yet. So, I do not know if the 3100 mAh high capacity batteries will last longer than batteries with an mAh rating considerably lower than 3100 mAh. The batteries were purchased to be used in a rather power hungry wall clock. So, I wanted batteries with a long life before needing to be recharged. The batteries were bargain priced at Wal-mart and delivery was free.