Anker 20,000mAh 30W Power Bank vs Anker Nano Power Bank MagGo Slim 5K

Buy the 20,000mAh Anker if you need to recharge a phone several times, charge two devices at once, or top up a laptop over USB-C. Buy the Nano MagGo if you want a slim magnetic pack that snaps onto the back of a Qi2 iPhone and disappears in a pocket. The big pack wins on capacity and ports; the Nano wins on size and cable-free wireless charging. Both hold a 4.5 rating, and owners of the 20K line praise reliability while MagGo owners like the magnet hold but note the small battery.

• Choose the Anker 20,000mAh Power Bank if you travel, work long days away from outlets, or need to charge a phone and a second device at the same time.
• Choose the Anker Nano Power Bank (5K, MagGo, Slim) if you carry a Qi2 iPhone and want a thin magnetic pack that charges without a cable.