[Q] good external portable charger

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Is there any good external portable battery or charger?

Ive got one of these http://www.amazon.co.uk/New-Trent-Du...ref=pd_cp_ce_1

5000mah: does what it's meant to do, you can charge any electronic device with it (that you already charge from a USB port).

It comes with a nice coiled cable which has a USB connector on one end, and 2 adaptors: mini- and micro-usb.

So you can use it for charging the external battery itself, and for charging the HD from the external battery. You can also use your own USB cables if you want.

Amazon also have an 11,000mah model!

They're much cheaper on Amazon than with the manufacturers, though you may find them even cheaper o ebay or similar. This brand had a lot of positive reviews on Amazon, and it seemed discounted, so I bought it from there.

I use Zagg Sparq

Specs:
6,000 mAh Lithium Polymer
Has the power to charge most smart phones four times
4 yellow lights indicate power level, 25%-50%-75%-100%
Has the ability to charge multiple USB devices simultaneously

I paid GBP21.95 for the New Trent 5000mah pack I mentioned in post #2.

It is now being sold on Amazon at GBP29.99

still a good price though, if you compare it to an OEM battery

just got this one today:
http://www.igo.com/accessories/power...t/ps002640004/

Seems to be working great. When it's connected to my phone it says that it's charging via ac