Backup battery / charger

Anyone used either of these or recommend one. All seem relatively good value for Money.

Aukey Portable External Battery Charger

Anker 2nd Gen Astro3 Portable External Battery

Jackery Bar Portable Charger

EasyAcc Slim Power Bank Charger

Thanks

If you're looking for a backup battery and charger for your iPhone, check the archives at Macworld Magazine and MacLife Magazine. Both have done articles on that subject in the past. Of course new stuff comes out all the time which makes it hard to keep up with the latest.

I have a Jackery portable battery that I got a while back. It has proven to be very useful in charging (slowly but surely) my iOS devices. It's not as efficient as plugging into a wall but given that the one I have has about 3 iPhone 6's worth of storage, it's not a bad thing to carry around.

You can check the reviews on Amazon.

I have purchased Anker Astro E4 at $23,99 and love it! Their customer service is great.