A power bank that's perfect for your phone might not even turn on your laptop. And a laptop power bank might be overkill (and overweight) if you only need to charge your phone. Here's how to pick the right one for your actual needs.
The Key Differences
| Spec | Phone Power Bank | Laptop Power Bank |
|---|---|---|
| Minimum Wattage | 18-30W | 45-100W |
| Ideal Capacity | 5,000-10,000mAh | 20,000-27,000mAh |
| Required Protocol | USB-C PD or QC | USB-C PD (mandatory) |
| Typical Weight | 4-8 oz | 12-24 oz |
| Price Range | $15-$50 | $45-$155 |
| Charges Per Fill | 2-5 phone charges | 0.5-1.5 laptop charges |
| Pocketable? | Yes (most models) | No (bag required) |
| Airline Friendly? | Always | Usually (check Wh rating) |
Why Laptops Need More Power
Phones have small batteries (3,000-5,000mAh) and efficient processors. They sip power. Laptops have larger batteries (50-100Wh) and power-hungry CPUs/GPUs. They gulp it.
More importantly, laptops require a minimum wattage to charge. If your power bank outputs less than your laptop needs, one of two things happens:
- The laptop ignores the power bank entirely (won't charge)
- The laptop charges extremely slowly — slower than it drains while in use
Minimum wattage by laptop type:
- Chromebooks/tablets: 30W
- MacBook Air / ultrabooks: 45-65W
- MacBook Pro 14": 70-96W
- MacBook Pro 16" / gaming laptops: 100-140W
Best Power Banks for Phones Only
If you only charge phones and earbuds, you don't need a laptop-grade power bank. Save money and weight:
- Best budget: INIU 10,000mAh ($16-22) — slim, fast, absurdly cheap
- Best MagSafe: Anker 622 MagGo ($30-40) — snaps to iPhone magnetically
- Best mid-range: Anker 737 ($95-110) — overkill for phones but future-proof
Best Power Banks for Laptops
For laptop charging, you need USB-C PD with adequate wattage. These are our top picks:
- Best value: Baseus 65W 20,000mAh ($45-60) — charges most ultrabooks at full speed
- Best overall: Anker 737 140W ($95-110) — handles even MacBook Pros
- Best premium: Anker Prime 250W ($130-155) — charges gaming laptops
Can One Power Bank Do Both?
Yes — and that's what we recommend for most people. A laptop-capable power bank charges phones just as well (it automatically adjusts output). The reverse isn't true: a phone power bank can't charge a laptop.
The Baseus 65W at $45-60 is the sweet spot — it charges laptops at full speed AND phones at fast-charge speeds. If you can only buy one power bank, get one with 65W+ USB-C PD output.
The only reason to buy a phone-only power bank: You want something ultra-slim and lightweight for daily pocket carry, and you have a separate solution for laptop charging (like working near outlets).
Our Recommendation
If you only charge phones: Get the INIU 10,000mAh. It's $16, slim, and does the job perfectly.
If you charge phones + laptop: Get the Baseus 65W. Best value for a do-everything power bank.
If you want the best regardless of price: Get the Anker 737. 140W output, 24,000mAh, charges literally everything.