Best Power Banks Under $20 in 2025
Power banks have become essential accessories in our daily lives. The sub-$20 segment offers excellent options in 2025 with fast charging, high capacity and durable builds. After extensive testing, here are our top recommendations that provide the best value for money.
1. Ambrane 20,000mAh Power Bank
$18.63
Key Features:
- 20,000mAh lithium-polymer battery
- 18W PD fast charging (Input & Output)
- Triple output ports (2 USB-A, 1 USB-C)
- Smart power management
- LED power indicator
Pros
- High capacity at affordable price
- Fast charging supported
- Can charge 3 devices simultaneously
- Durable build quality
Cons
- Slightly heavy (380g)
- No wireless charging
- Slow to recharge fully
2. Mi 3i 10,000mAh Power Bank
$18.99
Key Features:
- 10,000mAh compact design
- 22.5W fast charging
- Dual output ports (USB-A + USB-C)
- 12-layer circuit protection
- Aluminum alloy casing
Pros
- Premium metal body
- Very fast charging
- Pocket-friendly size
- Efficient power delivery
Cons
- Lower capacity than competitors
- Only two charging ports
- No display for battery percentage
3. Realme 10000mAh Power Bank
$17.53
Key Features:
- 10,000mAh capacity
- 18W fast charging
- Dual input (Micro-USB + USB-C)
- 12 protection features
- LED power indicator
Pros
- Affordable price
- Good build quality
- Works well with Realme phones
- Lightweight (220g)
Cons
- Plastic body
- No USB-C output
- Average charging speed
4. pTron 15,000mAh Power Bank
$17.73
Key Features:
- 15,000mAh lithium-polymer battery
- 20W PD fast charging
- Triple output ports
- Digital battery percentage display
- Dual input charging
Pros
- Accurate battery percentage display
- Good capacity for price
- Fast charging supported
- Multiple safety features
Cons
- Bulky design
- Plastic build feels cheap
- No wireless charging
5. boAt 10,000mAh Power Bank
$15.99
Key Features:
- 10,000mAh capacity
- 18W fast charging
- Dual output ports
- LED power indicator
- Sleek design with fabric finish
Pros
- Premium fabric finish
- Compact and lightweight
- Good charging speed
- Multiple color options
Cons
- Lower capacity than some competitors
- No USB-C output
- Slightly overpriced
Buying Guide for Budget Power Banks
When choosing a power bank under $20, consider these important factors:
- Capacity: 10,000mAh can charge most phones 2-3 times. 20,000mAh is better for multiple devices.
- Output Power: Look for at least 18W for fast charging. PD (Power Delivery) is best for modern phones.
- Ports: Multiple ports allow charging multiple devices. USB-C is becoming standard.
- Build Quality: Metal or high-quality plastic lasts longer. Check weight and dimensions.
- Safety Features: Overcharge, short circuit and temperature protection are essential.
- Brand Reputation: Stick with known brands for better reliability and warranty.