The portable battery that saved my last camping trip is $159 during the Amazon Spring Sale
Briefly

The EcoFlow River 3, part of the portable River series, excels in portability and fast charging, reaching full capacity in just 55 minutes. This model weighs under 8 lbs, ideal for various light tasks compared to the bulkier Delta series batteries. While the River series is less powerful, it is suitable for smaller devices and offers great convenience for users needing quick access to power. The recent addition of new models like the River 3 Plus and Delta 3 Plus showcases EcoFlow's commitment to diverse power solutions catering to different user needs.
The EcoFlow River series is a group of portable batteries prioritizing portability and convenience, making for lightweight units that can go almost anywhere.
The River 3 doesn't compare directly to the Delta series; they're built for different purposes. Still, the River 3 is compact and lightweight enough to carry around.
Read at ZDNET
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