I purchased the eight Bank charger, which came with four AA batteries and I purchased an additional eight AA batteries The package arrived quickly and the charger was easy to use. I even called customer service and they were great so far so good with the batteries. I use it in a portable handheld receiver and it’s working out great so far. From when I totally drained the batteries to full charges a couple of hours and I’ve gotten pretty good long life out of them so far I’ve never I’ve haven’t estimated the time yet and how long it lasts, but it lasts a pretty fair amount of time. I am enjoying the battery so far.