
Enough Power & Portable Size to Go Around
Ultra-High Capacity of 20800mAh yet portable with built-in A+ Lithium-Ion battery cells, can keep your devices running all the time.

Charge Faster, Charge Smarter
PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.

Charge 3 Devices Simultaneously
Fast charging via 3 USB ports (5V, 3.1A max), allowing for three devices simultaneous charging. They are compatible with almost all devices with an input of DC 5V.

Superior Quality for Safety
Top circuit protection chip to ensure complete safety. It supports overcharging, over-voltage, over current, short-circuit protection and temperature protection to protect your devices.

Intelligent LED Light and LED Torch
The four power indicators on the front show the charging status and battery level when you press the On-Off button. There is also a LED flashlight on the power bank. The lighting-up time can reach to 200 hours or more when the power bank is in full power mode. To activate the LED flashlight, double click the On-Off button.

Wide Compatibility
proVolta-21 is compatible with all the key devices that include iPhones, Android smartphones, iPads, tablets, and other USB-powered devices.
Battery Capacity
20800mAh
Battery Type
Lithium-Ion
Input
5V, 1.3A
Output
5V, 3.1A (Max)
Charging Time
18 Hours
Manuals and Drivers
F.A.Q
When I press the power button on my power bank, nothing happens. Is the battery dead?
No, it just needs to be recharged for 3-4 hours. If the problem persists, please contact us at customerservice@promate.net for assistance and a customer service representative will reply to your inquiry in a timely fashion.
How long should it take to fully charge my portable charger?
Typically, it will take up three to four hours to fully charge a Promate portable power bank after its initial charge. Smaller power bank should take less time, and larger portable chargers or external batteries may take slightly longer. For models with USB or micro USB input port, the output current from USB wall charger or PC USB port will inference charging time too.

Product Design
Award

Design & Engineering
Showcase Honors

CES Innovations
Awards Honorees

Best Product
Design Award

Me Retail Academy
Accessories Vendor

Computex
D&I Awards

Good Design
Award

Taiwan
Excellence

Destree
Diamond Award