VERY Highly Rated on

Slim2 (4,500mAh)

Slimmer and stronger At 10mm, Anker's Astro Slim2 comes with enough power for 2-3 charges on most smartphones in a compact, easy-to-grip case. An LED column on the front of the battery lets you know just how much juice is left without diverting attention from your work. Stack it behind your device and enjoy instant, uninterrupted use. Our goal was to make the Slim2 seem as if it wasn't even there.
	Say goodbye to knots Who doesn't hate tangled cables? With an intuitively-sized micro USB cord for Android, the Slim2 allows you to carry your power all-in-one.
Broad Compatibility We haven't forgotten about Apple users, though: a USB port makes it possible for iPhones to charge via normal wires. Free yourself from cords and get back to what's most important: life.
	No expense to speed What's better than a high-capacity battery that slides into your pocket on-the-go? One capable of providing your devices with simultaneous, full-speed charges. Both ports supply 1A of power with complete safety to your phones, so you can get back to a full bar in no time and make the most of your day.

Slim3 (6,000mAh)

	Slimmer and stronger. At 0.47in, Anker's Astro Slim3 comes with enough power for 3 or more charges to most smartphones in a compact, easy-to-grip case. Sized especially to stack behind your 4.7in smartphone for uninterrupted phone use while charging. An LED column unobtrusively lets you know just how much juice is left.
Say goodbye to knots Who doesn't hate tangled cables? With an intuitively-sized micro USB cord for Android, the Slim3 allows you to carry your power all-in-one. Using an iPhone? Plug into the USB port and charge up via your normal cable. Free yourself from cords and get back to what's most important: life.
	No expense to speed What's better than a high-capacity battery that slides into your pocket on-the-go? One capable of simultaneous, full-speed charges. Both ports supply 1A of power with complete safety to your phones, so you can power up in no time and make the most of your day.
For optimal use For simultaneous, max-speed charging of your Astro and other devices, check out Anker's new line of 18W / 3.6A car and home adapters. - Compatible with all Apple and Android smartphones, tablets and other 5V input USB-charged devices. The iPod nano, iPod touch and some GPS and Bluetooth devices are not supported. The built-in Micro-USB cord may not be able to work with thicker bumpers or cases.

Astro 2nd Gen with PowerIQ™ (6,400mAh)

Astro2 2nd Gen with PowerIQ™ (9,000mAh)

Compatibility maximized.

Not all charging ports are created equal. Standard ports only communicate effectively with particular devices, like Apple OR Android, often limiting their recharge rate. But with PowerIQ™ technology, each port intelligently identifies your device to speak its unique charging language. So plug in any brand or model and enjoy compatibility that doesn’t limit your charging speed.

Packed with power.

We figure, the more power, the better. Packed with 9000mAh of juice, and featuring an energy efficiency rate 10% above previous generation Astros and many current standard alternatives, the new Astro2 charges the iPhone four+ times and large-capacity phones like the Galaxy S4 almost three times.

Double take.

Chic and minimalistic, the new Astro2 may feel reserved at first. But, a friendly "shake" reveals its warm inner light to display the power level or begin your charge. Generous, cool, and delightfully intuitive, the new Astro2 is perfect for your next adventure, or just the daily grind.

Astro3 2nd Gen with PowerIQ™ (12,800mAh)

Compatibility maximized.

Packed with power.

We figure, the more power, the better. Packed with 12000mAh of juice, and featuring an energy efficiency rate 10% above previous generation Astros and many current standard alternatives, the new Astro2 charges the iPhone six times and large-capacity phones like the Galaxy S4 almost four times.

Double take.

Chic and minimalistic, the new Astro3 may feel reserved at first. But, a friendly "shake" reveals its warm inner light to display the power level or begin your charge. Generous, cool, and delightfully intuitive, the new Astro2 is perfect for your next adventure, or just the daily grind.

Astro E1 2nd Gen with PowerIQ™ (5,200mAh)

	PowerIQ: Detects your device. Delivers the fastest charge. Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.
High Capacity Charge your Apple or Android smartphone one to two times while on the move. You can even charge an iPad mini to about 80%!
	Incredibly Compact This thing is remarkably small. About the same size as a small candy bar, you simply will not find a more portable powerpack.
Superior Quality We use only premium battery cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety.

Astro E3 2nd Gen with PowerIQ™ (10,000mAh)

	Compatibility maximized. Not all charging ports are created equal. Standard ports only communicate effectively with particular devices, like Apple OR Android, often limiting their recharge rate. But with PowerIQ™ technology, each port intelligently identifies your device to speak its unique charging language. So plug in any brand or model and enjoy compatibility that doesn’t limit your charging speed.
Grab-n-go ready. With the importance of staying connected ever increasing, eliminate low-battery fear with the grab-n-go Astro E3. Power your iPhone 4+ times, a large-capacity phone like the Galaxy S4 more than twice, or a tablet once (depending on your model).
	Simple, reliable power Designed to be functional and efficient - nothing else. At 0.59in thin, the E3 comes ready to serve as an unobtrusive, lightweight solution to your daily power needs. And, increasing the new Astro E3's recharge rate from 1.5A to 2A, we've reduced the recharge time 25% to just 6 hours (with a 2A adapter).
For optimal use - For simultaneous, max-speed charging of your Astro and other devices, check out Anker's new line of 18W / 3.6A car and home adapters. - Compatible with all Apple and Android smartphones, tablets and other USB charged devices with a 5V charge input. The iPod nano and some GPS and Bluetooth devices are not supported.

Astro E4 2nd Gen with PowerIQ™ (13,000mAh)