The the OEM seller original charger with the same A/H rating was good for about 2.5-3 hours but had faded over the years to about 30-45 minutes. The replacement from Chargerbuy after several discharge/charge break-in cycles it is good for 1.5-1.75 hours, but not as good as the original. Also, the laptop charge indicator LED on the laptop continues to flash occasionally for over an hour after replacement charger is recharged which I didn't notice with the original.