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Charge your device & keep it safe with the Extreme Boost 20,000mAh Backup Battery

Backup batteries are nothing new, but the $35.99 Extreme Boost 20,000mAh Backup Battery is not just a run-of-the-mill external battery pack. It adds overcharge, overcorrect and short circuit protection to keep your phone or tablet safe as it charges. The 20,000mAh capacity and four USB ports mean you can charge multiple devices at the same time. 

  • Charge up to 4 devices at the same time
  • Smart Charge Technology automatically adjusts charging speed to your device
  • Power up safely w/ overcharge, overcurrent & short circuit protection
  • Get multiple charges w/ a huge 20,000mAh capacity
  • Monitor charging progress w/ the LED charge indicator



It’s available in both black and silver, and your purchase today guarantees that you’ll have it in hand by late July. 

the authorSteve Sande
Steve is the founder and former publisher of Apple World Today and has authored a number of books about Apple products. He's an avid photographer, an FAA-licensed drone pilot, and a really bad guitarist. Steve and his wife Barb love to travel everywhere!
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