Recommendations for a LiPo battery

I admit I don't know enough about these batteries yet.

Here is the info I have on the battery I need a back-up for:

Can someone here point me in the direction of a descent battery that would be a capable back-up?
Any thoughts would be appreciated. Thank you.

Turnigy has a bunch of good options, especially their graphene line.
Check out hobbyking.com.

Thank you kindly.

After a quick look,I will probably order one there when I have a little time to check them all out.

Here’s one example

It’s 45C instead of 25C, but that’s a good thing, just means it’s more powerful than you need and can deliver more current if necessary.