Jackery’s Amazon storefront offers its Portable Power Station Explorer 300 for $299.99 shipped when the on-page coupon is clipped. That’s down from the usual $350 going rate and the second-best price we’ve tracked. This 294Wh backup battery features everything you need to power up your mobile setup for a few hours (or more). That includes multiple AC outlets, one 60W USB-C PD port, and one 2.4A USB-A port. Great for powering up drone batteries in-between flights and other similar uses. Rated 4.8/5 stars. More below.