Running out of battery power can disrupt your entire day. Whether commuting, travelling, or spending long hours away from outlets, a reliable power bank has become as essential as your smartphone. The most recommended power bank in 2025 is the ZMI No.20, thanks to its exceptional 25,000 mAh capacity, 100W output, and premium build quality.
But with countless options available, how do you choose? This guide covers the top power banks in 2025 to help you make an informed decision.
Understanding Power Bank Basics
|
Measurement |
What It Means |
Example |
|
mAh |
Milliamp hour – battery capacity at a specific voltage |
10,000 mAh |
|
Wh |
Watt hour – actual energy capacity (more accurate) |
37 Wh |
|
W |
Watt – charging speed/power output |
20W, 65W, 100W |
|
Efficiency |
Usable capacity after conversion losses |
80-90% typical |
Key Point: A 10,000 mAh power bank = 37 Wh. You’ll achieve 80-90% of the rated capacity due to heat loss during the conversion process.
Top 10 Power Banks Comparison
|
Model |
Capacity |
Output |
Weight |
Best For |
Price Range |
|
ZMI No.20 |
25,000 mAh (90 Wh) |
100W |
580g |
Overall best, laptops |
Premium |
|
INIU B6 |
10,000 mAh (37 Wh) |
20W |
210g |
Budget phones |
Budget |
|
Anker 737 |
24,000 mAh (86.4 Wh) |
140W |
630g |
Premium laptops |
Premium |
|
Ugreen 145W |
25,000 mAh (90 Wh) |
140W |
505g |
Compact high power |
Mid-Premium |
|
Baseus Blade Pro |
20,000 mAh (74 Wh) |
100W |
467g |
Slim laptop bags |
Mid-Premium |
|
4Smarts Pocket |
10,000 mAh (37 Wh) |
45W |
200g |
Ultra-compact |
Mid-Range |
|
VRURC T2055 |
20,000 mAh (74 Wh) |
20W |
280g |
Budget high capacity |
Budget |
|
Romoss Sense4S Pro |
10,000 mAh (36 Wh) |
30W |
245g |
Fast phone charging |
Budget |
|
Ugreen Magnetic |
10,000 mAh (37 Wh) |
15W wireless + 20W wired |
225g |
MagSafe users |
Mid-Range |
|
INIU B62 |
20,000 mAh (74 Wh) |
65W |
385g |
Versatile all-rounder |
Budget-Mid |
Detailed Reviews
1. ZMI No.20 (QB826G) – Most Recommended Power Bank Overall
|
Feature |
Specification |
|
Capacity |
25,000 mAh (90 Wh) |
|
Ports |
2× USB-C, 1× USB-A |
|
Output |
USB-C1: 100W, USB-C2: 45W, USB-A: 100W (with included cable) |
|
Total Output |
210W combined |
|
Dimensions |
18.8 × 8.1 × 2.8 cm |
|
Weight |
580g |
|
Charging Time |
1.5 hours (100W) / 2.5 hours (45W) |
Efficiency Test Results:
- 10W (5V): 85% – 4/5
- 20W (9V): 86% – 4/5
- 100W (20V): 88% – 4/5
Key Features:
- Premium Samsung 21700 cells for longevity
- Pass-through charging & UPS mode
- Low-current device support
- Independent USB-C ports (no disconnection when a second device is plugged)
- Percentage display
Why Choose This: Best overall performer with exceptional capacity, multiple device charging, and premium build quality, ideal for heavy daily use.
2. INIU B6 – Best Budget Power Bank
|
Feature |
Specification |
|
Capacity |
10,000 mAh (37 Wh) |
|
Ports |
1× USB-C, 2× USB-A |
|
Output |
20W (9V, 2.22A) PD 3.0 |
|
Dimensions |
13.6 × 7 × 1.5 cm |
|
Weight |
210g |
|
Warranty |
3 years |
Efficiency Test Results:
- 10W (5V): 91% – 4.5/5
- 20W (9V): 85% – 4/5
- 18W (12V): 82% – 3.5/5
Included Extras:
- USB-A to USB-C cable
- Carry bag
- Built-in torch (double-press power button)
- Pull-out phone holder/stand
Why Choose This: Exceptional value with outstanding efficiency, generous warranty, and practical features at an affordable price.
3. Anker 737 PowerCore 24K – Best Premium Power Bank
|
Feature |
Specification |
|
Capacity |
24,000 mAh (86.4 Wh) |
|
Ports |
2× USB-C, 1× USB-A |
|
Output |
USB-C1: 140W (28V, 5A), USB-C2: 100W, USB-A: 18W |
|
Dimensions |
15.7 × 5.5 × 5 cm |
|
Weight |
630g |
|
Charging Time |
Under 1 hour (140W) / 1.5 hours (100W) |
Efficiency Test Results:
- 10W (5V USB-C): 86% – 4/5
- 20W (9V): 87% – 4/5
- 100W (20V): 89% – 4/5
- 140W (28V): 85% – 4/5
- 10W (5V USB-A): 81.5% – 3.5/5
Premium Features:
- Colour screen showing wattage, battery health, and usage stats
- PPS 5A support (3.3V – 21V)
- Samsung Super Fast Charging is compatible
- Quality 21700 cells with health monitoring
- 90W pass-through (no simultaneous self-charging)
Why Choose This: Ultimate laptop charging solution with a detailed display and the highest 140W output for power-hungry devices.
4. Ugreen 145W (PB205) – Best Compact High Power
|
Feature |
Specification |
|
Capacity |
25,000 mAh (90 Wh) |
|
Ports |
2× USB-C, 1× USB-A |
|
Output |
USB-C1: 140W, USB-C2: 65W, USB-A: 18W |
|
Combined |
100W + 45W when both USB-C ports are used |
|
Dimensions |
15.8 × 8.1 × 2.7 cm (20% smaller than rivals) |
|
Weight |
505g (10% lighter than rivals) |
Efficiency Test Results:
- 10W: 83% – 3.5/5
- 20W: 85% – 4/5
- 30W: 88% – 4/5
- 100W: 82% – 3.5/5
- 140W: 76% – 3/5
Advantages:
- Most compact 140W power bank available
- Often sold at discounted prices
- High-quality 21700 cells
- 65W recharge in 1.5 hours
- Includes 100W USB-C cable
Note: Runs hot at sustained high output, making it not ideal for in-bag laptop charging at maximum wattage.