Battery for 50D

[Photodiva]

I need an extra battery for my 50D a Bp-511a. I see canon is £80. Any recommendations for a cheaper alternative? I'm a bit wary of googling eBay dippliers without a reference!

 

[TCR4x4]

7dayshop have them for about £5 each. I have two, both seem fine.

 

[tramp92]

Amazon is sometimes good for batteries. Even genuine ones can be cheaper