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 three times before requiring a recharge itself. 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. If this product ever disappoints you, for any reason, you may return your Hammacher Schlemmer purchase for exchange, credit, or refund.

Should you have any questions, we are available seven days a week (8:00 am – midnight EST). Please call 1-800-321-1484 to speak with a specialist or email us at to receive a response within three business hours or less.

Item 90083
Price $69.95
Available for Immediate Shipment.
The One Year Smartphone Backup Battery (8400 mAh).
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