Battery Capacity: 30,000 mAh (nominal) — enough for many top‐ups of phones and other gadgets.
• Multiple Output Ports: Typically includes USB‐A and USB‐C ports so you can charge more than one device at once.
• LED Indicator: have an LED display showing the remaining power level.
• Fast Charging: Many listings indicate support for fast charging output
• Dual Input Charging: Recharge the power bank itself via USB‐C or micro‐USB inputs.
• Safety Protections: Over‐charging, over‐heating and short‐circuit protections are usually included.