Mini Fan Portable Handheld Fan 5 Speed USB Rechargeable 5000mah with LED Display 7-16 Hours Quiet Suitable for Office Outdoor Product Description Frequently Asked Questions: 1.Q: Why didn't my handheld fan receive the battery? Do I need to purchase additional batteries? A: Rechargeable batteries are already installed in the fan, so you don't need to purchase additional batteries or charge them. When the battery runs out of power, charge them. 2.Q: How long does it take to fully charge the battery? How long does it last to charge electricity A: The charging time is approximately 2-3 hours. Please ensure that the battery is fully charged before turning off the power. Battery standby time is 7-12 hours 3.Q: How do I charge a mini handheld fan? A: Connect the inserted USB cable to a 5V2A output adapter, such as a mobile phone charger, power bank, or other USB outlet device, to charge the fan. 4.Q: Can I use it in a stroller or car? A: Yes. It is equipped with a rope, please tie it to the stroller, so it can be used for strollers, office folding screens, strollers, camping tents, student beds, etc.