Which battery extender case(s) do you suggest for the iPhone 4/4S?

[Elliot B.]

I am looking for a battery extender case for an iPhone 4/4S for my partner.

I bought a Logic3 PowerSleeve in early 2011 for my phone at the time, an iPhone 4. It was ?25 and it has been fantastic, even on my iPhone 4S.

It appears they are no longer for sale. Amazon has 1x used one for ?21 and eBay has 3x from ?28.15 (but that's an auction price, with 6 days still to go).

What battery extender case(s) do you suggest for the iPhone 4/4S?

I don't really want to pay over ?25 considering my PowerSleeve was that price and has done the job perfectly since I bought it.

[Barpanda]

The Boost Case Hybrid is nice, but perhaps a tiny bit outside of your budget. Are there any specific qualities, other than battery extension, that you're looking for in this new case?

[Elliot B.]

The Boost Case Hybrid is nice, but perhaps a tiny bit outside of your budget. Are there any specific qualities, other than battery extension, that you're looking for in this new case?

I just want it to charge the battery.

I'm thinking this. 100 more mAh than my PowerSleeve, and it's cheaper.

[Barpanda]

Nice case! I don't have any experience with it, but it seems it has received awesome customer ratings.