Very disappointed.I got this because the old battery, which was4-5 years old, seemed to be going. It went from holding a charge for 8-10 days - light usage and standby - to holding a charge for three days with the same usage.I bought this one. It came promptly and seemed to be okay, though I didn't look closely. It holds a charge for three days with (very) light usage and standby.I waited awhile to write this review, because a tiny note on a tiny tag says it may require three charges before it reaches maximum capacity. Well, now it has had four or five charges (charging now, Thurs. afternoon after having been charged Sunday night) and it's still the same deal. Three days, with almost no calling.As I said, very disappointed. I'm going to write the seller tonight, see how they respond.