Portable power bank (10,000-20,000 mAh)

What to look for

1. 110,000-20,000 mAh capacity (higher number = more recharges)
2. 2Built-in cables so you don't carry extras—check your phone's charging port type
3. 3Two output ports to charge phone and friend's device simultaneously
4. 4Slim enough to fit in jacket pocket or small bag

Skip

• ✕Models without capacity clearly stated in mAh
• ✕Power banks requiring you to buy separate cables
• ✕Extremely cheap options under $15—they often fail or provide false capacity ratings

Used for: night photography and late exploration · all-day map navigation and GPS tracking · coordinating group meetups · researching locations on the go