Here's what other sites are saying:
Bring a little insurance for your electronic devices with the BioLite Charge USB Power Bank wherever you're headed. This pocket-sized battery gives a boost to your phone, tablet, headlamp, or other USB-powered device when you're camping in the mountains, traveling across the pond, or just out and about on daily adventures.
The BioLite Charge 40 USB power bank features an ultrathin and durable stainless steel design to bring you portable power that crosses over from the backcountry to everyday.
BioLite Camp & Hike Charge 20 USB Power Bank-Silver BAA1020. Lightweight and easy to use charge phones tablet and any other gear you need to keep your day going.
The BioLite Charge 10 USB Power Bank is a power supply to keep your small devices going. Whether you're traveling or out on a hike, this'll give your phone the extra juice needed at the end of the day. A silicone gasket covers up the USB port, providing a little splash-resistance, just in case of an unexpected rain shower. Phone, tablet or camera, get your stuff going to finish out the day. Features of the BioLite Charge 10 USB Power Bank Rugged stainless steel housing 4-level LED power indicator lets you know how your battery is doing, whether charging or discharging IPX6 water resistance shrugs off even the heaviest downpour 1.5A output Ports: micro-USB female (charging), type-A USB female (discharging) Includes a micro-USB charging cable
Seattle Sports SurviVolts Power Bank
Goal Zero Guide 10 Plus Recharger
$30 - $39
EasyAcc 20000mAh Rugged Power Bank
EnerPlex Jumpr Slate 5K-L
Duracell Instant USB Charger
InstaPark Mercury 10 Solar Panel Charger