• Supersized power in the palm of your hand.

Detects your device. Delivers the fastest charge.

• Exclusive to Anker, PowerIQ™ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.

Packed with power.

• From camping trip to disaster zone and everywhere in

• Supersized power in the palm of your hand.

Detects your device. Delivers the fastest charge.

• Exclusive to Anker, PowerIQ™ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.

Packed with power.

• From camping trip to disaster zone and everywhere in between, the 2nd Generation Astro E4 multiplies your battery life to keep you powering on for days. With enough charge to feed your smartphone 3-6 times (depending on its battery size), just put this power pack in your pocket and leave your charging troubles behind.

A very handy design.

• Slimmer, sleeker, smarter - enjoy the world's most powerful portable battery more than ever before. The revamped E4 rests nicely in your palm and sports a single button perfectly positioned for your thumb. Check the power level with one simple press or turn on the flashlight by pressing for 3 seconds.