Samsung B2700 Standard Battery - AB663450

The li-ion battery that came with the Samsung B2700 phone originally was really good and lasted 14 days (two weeks) on standby from charge to charge. The replacement from MobileFun.co.uk does not. 4 days maximum is the best I've had out of it between charges and this is now equal to the battery it was supposed to replace. This purchase is however better than another one I made recently of a non-Samsung replacement battery for the same phone. I had to return it to the company from which it was bought (in Germany) as it didn't work at all. Delivery time from MobileFun was fine though, no complaints there. But since this is a product rating it has to be low as I'm quite disappointed in the battery itself. Sorry about that (I wonder if it's old stock supplied from Samsung as new?).