If you're a long-haul power user, our Anker Astro2, Astro3 and Astro 3E external battery packs deliver 40 hours of talk time or 4-5 full charges to your smartphones. For those who just need a boost to get through the last hours of the day, the Anker Astro Mini and Anker Slimtalk offer a single full charge to your smartphone in a convenient compact package.

 

Compact

Each Anker Astro external battery is designed to get you powered up, without getting in the way. Comparable in size to a lipstick or a cell phone, you can easily slip the Anker Astro Mini or the Anker Slimtalk into your jeans or purse for easy confidence on the go. Only slightly larger, the Anker Astro is another easy fit with 2-3 times the capacity.

Multi-tasking

Share the convenience of a portable charge with multiple devices. Simultaneously charge two devices with our Anker Astro2, Astro3, and Astro3E dual USB external chargers.

Reliable

Grade A cells and premium microchips ensure 500+ recharge cycles over the life of each external battery.

Popular Compatible Models

for Apple: for iPhone 5 (OEM cable required) /for  iPhone 4S, 4, 3GS / for iPod / for iPad, for iPad 2,for iPad mini
for HTC: One X, S, V / Sensation, Sensation XE XL / EVO 4G / Radar 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire X, C, V, HD, S, Z
for Samsung: Galaxy S3 / Galaxy Note 2 / Galaxy S2 I9100 / Galaxy S I9000 / Verizon Galaxy S3 I535 / AT&T Galaxy S3 I747 / Sprint Galaxy S3 L710 / T-Mobile Galaxy S3 T999 / T-Mobile Galaxy S2 T989 / AT&T Galaxy S2 I777 / AT&T Galaxy S2 Skyrocket SGH-I727 / Galaxy Nexus / Galaxy Note / Focus S / Infuse
for Motorola: Droid Razr, Bionic / Atrix 2 / Triumph
for LG: Nexus 4, Optimus 4X, 2X, V, S, T, 3D, 7
for Nokia: Lumia 920 900 710 800 / N8 / N9
for Others: for Blackberry Torch Curve 9900 9360 9320 / Sony Ericsson Xperia Arc S, X10 / PSP / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle, Kindle Fire