The 5 Best Power Banks under $100
A power bank's biggest wattage is often shared across several ports. If you're trying to charge a laptop, the number that matters is what one USB-C connection can deliver; for a phone, size and whether you remembered a cable may matter more. I would choose by the device that most often runs out first, then check the battery's weight before adding it to a daily bag.
Anker's 20,000mAh 87W model is my laptop-capable pick, but its maximum for one device is 65W. The smaller INIU makes more sense if you want a lighter 45W option. For an iPhone that supports Qi2 magnetic charging, MagGo trades wired efficiency for the convenience of snapping on. A two-pack is useful for two bags, not a substitute for faster output.
Our top 5 power banks under $100
Swipe to compare price, rating and best use →
| Product | Price | Rating | Best for |
|---|---|---|---|
01 Anker 20K 87W Power BankDetails ↓ | $59.99 | 4.5/5Amazon | Best overall for a laptop |
02 INIU 10K 45W Power BankDetails ↓ | $21.99 | 4.4/5Amazon | Best compact laptop backup |
03 Anker Zolo 20K 30WDetails ↓ | $42.99 | 4.4/5Amazon | Best high-capacity phone bank |
04 Anker MagGo 10K Slim Qi2Details ↓ | $79.86 | 4.4/5Amazon | Best magnetic iPhone backup |
05 Miady 10K Two-PackDetails ↓ | $21.99 | 4.5/5Amazon | Best two-person budget pack |
01 — Anker
Best overall for a laptopAnker 20K 87W Power Bank
The Anker 20K is where I would start if a laptop sometimes needs power away from an outlet. Anker specifies a 20,000mAh battery, a built-in USB-C cable and up to 65W to one USB-C device. Its 87W headline is combined output across devices, so the 65W figure is the one to compare with your laptop.
It leads because that single-device headroom and the attached cable solve a common travel problem under the $100 cap. The trade-off is size and weight: Anker lists about 431g, much more than a small phone-only pack. If you rarely charge a laptop, the smaller INIU will be easier to carry.
Specifications: Anker A1383 output specifications ↗
View on Amazon ↗A laptop and phone on days without a nearby outlet.
Your bag needs the lightest phone-only backup.
What I like
+Built-in USB-C cable and up to 65W to one device.
What to weigh
−87W is shared output; approximately 431g to carry.
- Capacity
- 20,000mAh
- Output
- 65W single USB-C device; 87W combined maximum
02 — INIU
Best compact laptop backupINIU 10K 45W Power Bank
The INIU is the alternative I would pack when 20,000mAh feels like too much weight for a short trip. Its listing pairs a 10,000mAh capacity with a stated 45W USB-C output, giving a compatible laptop or tablet a useful top-up without carrying the larger Anker every day.
It ranks second because the lower capacity and output will not cover as much laptop time. The 45W figure also needs matching to your device and cable; some laptops draw more and may charge slowly while in use. For phones and lighter computers, that compromise can be worth the smaller pack.
Specifications: Exact Amazon product listing ↗
View on Amazon ↗A lighter everyday battery for a phone and compatible USB-C laptop.
Your laptop needs more than 45W or a long unplugged session.
What I like
+10,000mAh format with stated 45W output.
What to weigh
−Half the Anker 20K capacity and less single-device headroom.
- Capacity
- 10,000 mAh
- Output
- 45 W max
- Ports
- USB-C + USB-A
03 — Anker
Best high-capacity phone bankAnker Zolo 20K 30W
I would choose the Zolo when the plan is to keep phones and small USB-C devices going for a long day, not to charge a power-hungry laptop. Anker specifies 20,000mAh, a built-in USB-C cable and up to 30W output. That gives you the larger battery capacity of the first pick with a lower power ceiling.
It sits third because the 30W ceiling makes it less versatile for laptops than the 65W Anker. It also is not as compact as the 10K INIU. If your main problem is forgetting a charging lead during travel, the attached cable is the convenience that justifies it.
Specifications: Anker Zolo A1689 guide ↗
View on Amazon ↗Long phone days when an attached USB-C cable helps.
Your laptop needs 45W or more.
What I like
+20,000mAh capacity and built-in cable.
What to weigh
−30W maximum limits laptop use.
- Capacity
- 20,000mAh
- Maximum output
- 30W, per Anker
04 — Anker
Best magnetic iPhone backupAnker MagGo 10K Slim Qi2
MagGo is the one I would buy for a compatible iPhone when putting a cable away matters more than maximum efficiency. The exact slim 10,000mAh model supports Qi2 magnetic wireless charging at a stated 15W, so it can stay attached while you use the phone. That is a different job from powering a laptop.
I rank it fourth because its higher price buys convenience, not the most capacity or output here. Wireless charging creates more loss and heat than a simple cable, and the magnetic fit depends on your phone and case. Choose the wired Anker or INIU if those compromises would annoy you.
Specifications: Anker MagGo slim 10K product information ↗
View on Amazon ↗A compatible iPhone user who values cable-free top-ups.
You mainly need laptop charging or the most energy per dollar.
What I like
+Qi2 magnetic alignment and a slim 10K format.
What to weigh
−Costs more for convenience and wireless energy losses.
- Capacity
- 10,000mAh
- Wireless
- Qi2, up to 15W for compatible devices
05 — Miady
Best two-person budget packMiady 10K Two-Pack
The Miady set is for two people or two bags that each need a basic phone backup. You get two separately rated 10,000mAh packs, which is more useful than sharing one battery when people split up during a day out. This is a distribution decision, not a claim that either pack charges faster.
It ranks fifth because the listing gives me less dependable output and long-term support detail than the named single-pack alternatives. Check the exact ports, cables and per-pack watt-hour marking before travel. If one person needs a dependable laptop top-up, buy one higher-output bank instead of two cheap ones.
Specifications: Exact Amazon product listing ↗
View on Amazon ↗Two phones in separate bags on a tight total budget.
One device needs fast laptop-capable charging.
What I like
+Two individual 10,000mAh packs for separate users.
What to weigh
−Less specific output documentation than the leading banks.
- Capacity
- 10,000 mAh each
- Quantity
- 2
- Ports
- USB-C + dual USB-A
Price information
Amazon price and availability checked Oct 17, 2026, 10:37 PM Lisbon time. Prices and availability are subject to change; the information shown on Amazon.com at purchase applies.
Our process
How we picked.
We compare five relevant products for different needs, using documented specifications, clear use cases and practical trade-offs. Our goal is to make the differences clear and help you choose with confidence.
- 01Relevance
Each product must fit the guide’s intended use, audience and requirements.
- 02Specifications
We compare the key product details that meaningfully affect the buying decision.
- 03Use case and fit
We compare the intended use, configuration and practical fit of every selected product.
- 04Strengths and limitations
We explain where each option performs best and the compromises to consider.
Good questions
FAQ — Power Banks under $100
01Does an 87W power bank give one laptop 87W?+
Not this Anker. Its 87W claim is combined output; Anker specifies up to 65W to one USB-C device. Compare your laptop’s charging needs with the single-port rating.
02Is 20,000mAh twice as many phone charges as 10,000mAh?+
Not exactly. The rating describes the internal cells. Conversion, cables and wireless charging lose energy, so usable output is lower and varies by device.
03Can I bring a power bank on a flight?+
The FAA says spare lithium-ion power banks belong in carry-on baggage and normally must be no more than 100Wh per battery without airline approval. Read the Wh marking on the exact unit and your airline’s current rules.
04When is a magnetic power bank worth it?+
Choose it for a compatible Qi2 phone when attaching a pack without a cable matters. Wired charging is generally the more direct option for laptops, tablets and phones without compatible magnetic alignment.
The short answer
Start with the Anker 20K 87W Power Bank.
I recommend it for a laptop and phone on days without a nearby outlet. Choose something else if your bag needs the lightest phone-only backup.
View on Amazon ↗Keep looking
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