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The One Year Smartphone Backup Battery (8400 mAh)

This is the smartphone battery that holds its charge for a full year, ensuring you always have backup power during an emergency. While power seeps out of most rechargeable batteries after only three months of inactivity, this 8400 mAh lithium-ion battery has a unique covered jack that seals in power, so even after a year on the shelf it remains 97% charged. It fully charges an iPad Mini, iPhone, or Android in under three hours and can charge an iPhone 5 1/4X before requiring a recharge itself. Includes microSD cable for USB 2.0 (Apple Lightning cable not included). The device also incorporates an LED flashlight and emergency beacon. Recharges via your device’s USB/AC adapter in six hours. 4" L x 2" W x 1" D. (7 oz.)




Compatible Devices

Compatible with all devices that use USB connector. (Connector not included)
  • All iPhone models
  • All iPad models
  • All iPod models
  • All Android devices

Lifetime Guarantee

The One Year Smartphone Backup Battery (8400 mAh) comes with The Hammacher Schlemmer Lifetime Guarantee. Items that we sell are guaranteed for their normal life under standard non-commercial use.

Should any product fail to meet your expectations, we will replace it or refund the cost of the item less shipping and service fees. Returns older than one year will be credited in form of a gift certificate.

Should you have any questions, we are available seven days a week (Monday - Friday 7:30 AM - 9 PM EST and Saturday - Sunday 7:30 AM - 8 PM EST) Please call 1-800-321-1484 to speak with a specialist or email us at to receive a response within 24 hours or less.

Item 90083
Price $69.95
Available for Immediate Shipment.

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The One Year Smartphone Backup Battery (8400 mAh)
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The One Year Smartphone Backup Battery (8400 mAh)
The One Year Smartphone Backup Battery (8400 mAh) - Plugged in
The One Year Smartphone Backup Battery (8400 mAh) - With flashlight on
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