USB Battery Roundup: Anker 13000mAh $30, RAVPower 8400mAh $20, Lepow Stone 6000mAh $16, more

51+pDMaPYEL._SL1500_Amazon has the Anker 2nd Gen Astro 13000mAh Dual USB Battery/Charger for only $29.99 shipped with Prime (free trial).  That’s $60 off the list price and the current lowest we could find for it. It features PowerIQ technology that maximizes compatibility with Android, Apple or other devices by enabling charge speeds of up to 3 amps. It has a huge 13000mAh capacity that charges an iPhone 5s almost 6 times, a Galaxy S5 over 3 times or an iPad Air once.

Next up, is the 8400mAh RAVPower Deluxe External Battery charger also at Amazon for $29.99 down from $79.99. The coupon code: ZXZHF3OO takes it down to only $19.99. That’s a $60 savings off the list price and the lowest it’s ever been. With this one you can get 3-4 charges on your iPhone 5, 4S, 1.5 charges on your iPad 2, and 3 charges on your Google Nexus. It has 3A Max output. 5V 2A-1A Dual USB charges 2 devices rapidly. 2A output is for iPads/Tablets and the 1A output is for iPhones/Smart phones.

We also found the following notable battery packs on sale:

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