The description states that it will hold 5 to 48 hour charge, depending on use. I had it fully charged (via plug) before using it, we went camping on a hot weekend) The set up had the panel in the sun while in use and it last 15 minutes (fan). It works fine if its plugged into a power source (portable box) but not on solar alone.
Stay Cool Anywhere With LEMOISTAR Portable Neck Fan – 3 Speeds, Bladeless Design, Rechargeable Battery And USB Powered For Ultimate Convenience
31 Review
Stay Cool On-The-Go: TriPole Mini Handheld Fan With USB Rechargeable Battery, Adjustable Speeds, And Foldable Design
32 Review
USB Rechargeable Portable Handheld Mini Fan, 3 Speed Foldable Desk Fan With Battery Operated Hanging Personal Fan For Home Office Indoor And Outdoor Travel
41 Review
Xiaomi Solove F5 Global desktop fan, white
35 Review
COMFYHOME 3 IN 1 Portable Evaporative Air Cooler - 60°Oscillation, 12H Timer & Remote, Windowless Room AC For Bedroom Home Office
11 Review
Split system Roda RS-AL09F / RU-AL09F
37 Review
Stay Cool With COMFYHOME 3-In-1 Portable Air Conditioner - Efficient Evaporative Air Cooler For Home And Office
11 Review
Senville AURA: Energy Star Mini Split Heat Pump W/ 9000 BTU & Alexa Compatibility
13 Review