Need an external battery charger

[Rainbowww]

Hi everybody, I am looking for some advie on picking one external battery charger for my Galaxy4. Any advice would be really apprecitated. Thanks.

 

[Rainbowww]

My friend recommand me one 14,000mAh pack from RAVPower.. I found they are on sale on Amazon: http://www.amazon.com/RAVPower-Lightning-Thunderbolt-Incredible-connectors/dp/B00EHEEFWY/

ANY IDEAS on this product?

 

[loveboa]

My friend recommand me one 14,000mAh pack from RAVPower.. I found they are on sale on Amazon: http://www.amazon.com/RAVPower-Lightning-Thunderbolt-Incredible-connectors/dp/B00EHEEFWY/

ANY IDEAS on this product?

i have not idea in this product, but i use kinkoo to charge for my G S4, which 8000 mAh capacity can charge more than 4 times for my phone with a high speed.
http://www.ikinkoo.com/shop/portable-charger/kinkoo-infinite-one-8000mah.html