1. High Capacity

It has a capacity of 20,000 mAh (which corresponds to about 74 Wh) — enough to charge most smartphones multiple times. 

Because of this large capacity, it's very useful for travel, long trips, or situations where you don’t have access to power for a while. 

2. Dual Input Ports

It supports both Type-C and Micro-USB for recharging. 

For example, in some variants, the Type-C input is rated at 5V/2A and Micro-USB at 5V/2A. 

3. Dual (or Multiple) Output Ports

Some models have two USB-A output ports, each able to deliver up to 5V / 2.1A. 

Because of this, you can charge two devices simultaneously. 

In some higher-spec models (like the 22.5 W one), it supports fast-charging protocols (PD, QC). 

4. Fast Charging

The 20,000 mAh model on Jumia supports up to 2.1A output, which helps in charging devices relatively fast. 

There is a 22.5 W (PD) version (model OPB-7204Q) — this one can charge a device up to 60% in ~30 minutes according to its specs. 

There’s also the PowerNova Q21 (OPB-7200Q) which supports 12V, 9V, etc., input/output and has 22.5 W power delivery. 

5. Protection & Safety

Oraimo includes a multi-protection system to guard against overcharging, short circuits, overheating, etc. 

Higher-end models (like the 22.5 W PD version) use a 15-layer protection system for enhanced safety. 

6. Other Features

LED Torch: Some models (like the Traveler) come with a built-in LED torch / SOS light. 

Smart Chip Technology: The Oraimo power banks often use “AniFast™” technology — this helps intelligently detect the charging protocol of the connected device and deliver the optimal current. 

Durable Design: The body is compact and has a textured surface. 

LED Indicators: There are LED lights to show remaining battery level. 

7. Warranty

Usually backed by a 365-day (1 year) manufacturer warranty from Oraimo or its local distributors. 

8. Compatibility

Works well with a wide variety of devices: smartphones, tablets, Bluetooth earphones, smartwatches, etc. 

With its fast-charging protocols (on high-end models), it can support devices that use PD, QC, etc. 

9. Charging Time

For some models (e.g., the standard dual-input, 2.1A output version), full recharge takes around 8–10 hours, depending on the input source.