The Unifun U821 power bank contains a 10,400mAh internal battery which offers enough juice for roughly five charges for most standard-sized phones or around three charges for larger models. The battery is paired with dual USB ports for charging two devices at the same time. Four LED lights on the side of the unit give you a quick visual indication of when it’s running low, and the device can be fully charged in under seven hours for several days’ worth of power on the go.
The U821’s shock-resistant housing and IP66 dustproof and waterproof rating make it ideal for camping, hiking, or any outdoor activity where a standard charger might not hold up. Its body is bright orange for easy visibility in case you drop it in tall grass, water, or other places where a dark-colored unit might be easily lost. The power bank also doubles as a high-powered LED flashlight which can provide six to eight days’ worth of light when the internal battery is fully charged.
The Unifun waterproof power bank normally costs $17, making it an affordable option for a rugged outdoor charger even at its regular price. You can now take $3.50 off with the checkout code 7KYUNRJU, bringing the price down to just $13.50 for a limited time.
Digital Trends may earn commission on products purchased through our links, which supports the work we do for our readers.
Editors' Recommendations
- The best solar chargers for your phone or tablet
- The best portable chargers for 2021
- The best phone case brands
- The best iPhone docks for 2021
- Here’s a list of portable tech gadgets you’ll want to use every day
