AccuLoop 9 Volt 220 mAh NiMH Rechargeable Battery PP3

The change last a long time. It better than another brand with 280 mAh.

The 9 volt battery will not accept a full charge with an Accupower AccuManager 20 battery charger even after a 24 hour charge.

I baught my first set of 8 acculoop 9v batteries and Titanium model MD-8900 eight bank charger 5 years ago. There used in professional portable microphones in our church. Only two of the batteries have gone bad in the five years. Great batteries. They have lots of power and hold a charge a long time. They also store in the charger with no damage to the battery. Best buy ever. Paid for itself many times over, for we used to use alkaline batteries and replaced them every month.