Anker Zolo 20,000mAh Power Bank vs Anker 621 MagGo Magnetic Battery

Buy the Zolo if you need to recharge a phone several times, charge a laptop, or top up two devices at once. Buy the MagGo if you want a slim magnetic pack that snaps to the back of an iPhone and disappears in a pocket. The Zolo wins on capacity, output and ports; the MagGo wins on size, weight and cable-free convenience. Owners of the MagGo rate it well for the magnet hold and pocketability, while Zolo buyers value the built-in cable and the high capacity for travel.

• Choose the Anker Zolo if you want one pack that can refill a phone multiple times, run a laptop over USB-C, and charge two devices at once.
• Choose the Anker 621 MagGo if you carry an iPhone and want a slim magnetic battery that snaps on and charges without a cable.