This battery had relatively poor life from start although all procedures were followed. Max 3 days on standby. A truly original battery would last ages. Complained to retailer after about 2 months. Apart from usual apologies and promises to send replacement, then when no show, promises to refund, no action at all.
Complained to Amazon and they were very quick to investigate and refund. Well done to Amazon !
Pay more at reputable retailer, even get direct from Amazon, rather than marketplace seller. If you can at all, ensure you get a true original battery.