[Closed] Decent source for replacement laptop batteries?

Hi all,
Sorry to ask but my googling skills are weak & although I can find plenty of batteries for the laptop in question I have no idea if they are safe of not!
I was looking at [url= http://www.ebay.co.uk/itm/For-ACER-ASPIRE-5755G-5755Z-5750TG-5750Z-5750ZG-AS10D51-AS10D81-Laptop-BATTERY-/271272158270?pt=UK_Computing_LaptopsAccessories_LaptopBatteries&hash=item3f2914a43e ]this one[/url] as it is about 70% dearer than the cheapest & has all the safety marks you would want, but given that the C E mark seems to indicate it as a China export rather than certified I have doubt's over the rest of the markings.

If anyone could point me to a decent source then I would be grateful 🙂

Many thanks.