Best Portable Charger for Travel 2026: 7 Power Banks Compared

A dead phone abroad is a navigation and safety problem. The marketing on Amazon is a different problem: mAh numbers that do not match the watt-hour label security will actually read.

This desk does not cycle packs on a bench. The seven below are the ones that keep showing up in r/onebag and r/travel, checked against manufacturer watt-hour ratings and the FAA PackSafe passenger battery page. For the plug that goes in the wall, see best travel adapters. For the bag that has to carry the pack in the cabin, see best carry-on luggage.

---

Quick comparison

Power bank	Capacity (maker)	Wh (maker / math)	Weight	Output	Ports	Street price	Best for
Anker 737 (PowerCore 24K)	24,000 mAh	86.4 Wh	~1.4 lbs / 630 g	140W USB-C PD	2 USB-C, 1 USB-A	~$90–$120	Laptop + phones
Anker 622 MagGo	5,000 mAh	~18.5 Wh	~4.6 oz	7.5W MagSafe / 12W wired	MagSafe + USB-C	~$30–$48	iPhone day trips
Baseus 65W 20,000 mAh	20,000 mAh	~74 Wh	~14 oz	65W USB-C PD	2 USB-C, 1 USB-A	~$45	Laptop + phone, lighter than 737
Nitecore NB10000	10,000 mAh equiv.	39 Wh (Gen4)	5.0–5.3 oz	18–22.5W	USB-C (+ USB-A on older gens)	~$35–$70	Ultralight
Anker 523	10,000 mAh	~37 Wh	~7.6 oz	20W USB-C	1 USB-C, 1 USB-A	~$22	Value
BioLite Charge 40 PD	10,000 mAh	37 Wh	9.4 oz	18W USB-C PD	1 USB-C, 2 USB-A	~$40	Outdoor / camp-adjacent
INIU 10,000 mAh (B41-class)	10,000 mAh	~37 Wh	~6.6 oz	~22.5W	USB-C, USB-A, often Lightning	~$18	Budget

Wh is what the airline cares about. mAh is what Amazon titles shout. If the printed Wh is missing, FAA math is volts × amp-hours (mAh ÷ 1000).

Listing check: confirm the exact model (737 vs a newer Anker Prime), the Wh printed on the pack, included cable, and new-vs-warehouse condition. Counterfeit Anker listings are a known Amazon complaint.

---

Airline rules, from the agencies

Spare lithium-ion packs — power banks, charging cases, loose cells — stay in the cabin. TSA and FAA both say checked bags are the wrong place for a thermal-runaway risk nobody can see.

At or under 100 Wh: Allowed for personal use on passenger flights without special approval. Every pack in this table sits under that line.

101–160 Wh: Airline approval, maximum two spares, cabin only.

Over 160 Wh: Forbidden on passenger aircraft except some mobility-device cases.

If a gate agent takes your carry-on at the jetway, pull the power bank out before the bag goes down the belt. Several US carriers also tell you not to leave a pack buried in an overhead bin while it is charging something.

ICAO’s 2026 addendum and some airline pages have started tightening in-flight use: limits on how many packs, no charging a pack from the seat outlet, keep a live pack visible instead of burying it in the overhead. The FAA page is still the US baseline. IATA guidance can read stricter than US DOT. The operating carrier wins. Check that page, not a marketplace FAQ.

If the Wh ink has rubbed off, do the FAA math from the voltage and mAh printed on the cell, or leave the pack at home. A mystery brick is how people lose one at the checkpoint.

---

1. Anker 737 Power Bank (PowerCore 24K)

Best high-output pack that still clears 100 Wh

Anker’s own spec for the 737 / A1289 is 24,000 mAh / 86.4 Wh, 140W USB-C PD on the bidirectional port, two USB-C plus one USB-A, digital display, about 630 g. Older write-ups (including an earlier draft of this page) said 25,600 mAh. That is a different number than Anker prints.

86.4 Wh is the travel feature: laptop-class output without begging the airline for a 101–160 Wh exception.

Anker 737 on Amazon

What owner threads say: Default rec on r/onebag when someone needs a MacBook Air top-up and two phones. Weight is the complaint. Recharge time depends on the wall brick — Anker quotes about an hour with a 140W charger, longer with a 65W laptop brick.

The catch: 1.4 lbs in a day bag is real. If you only charge a phone, this is the wrong tool.

---

2. Anker 622 MagGo

Best for MagSafe iPhones, not for a week offline

Anker’s 622 MagGo page lists 5,000 mAh, USB-C in/out, and 7.5W wireless to iPhone 12 and later. Wired output is modest. Anker’s own FAQ says conversion loss means you should expect roughly one phone charge, not two.

Anker 622 MagGo on Amazon

What iPhone threads say: Perfect for a museum day. Useless as your only pack on a 14-hour delay. Thick cases break the magnet.

Listing check: MagGo SKUs proliferate (5000, 10000, Qi2). Confirm 622 / A1614 if you want this small one.

---

3. Nitecore NB10000

Best grams-per-Wh in ultralight threads

Nitecore’s NB10000 line is the carbon-fiber brick r/ultralight argues about. Gen4 on Nitecore’s page is 10,000 mAh equivalent / 39 Wh, about 143 g (5 oz), 22.5W, dual USB-C, IPX7. Older gens were closer to 5.3 oz and 18W with a USB-A port.

Nitecore NB10000 on Amazon

What backpackers say: Worth its weight if you count grams. Not a laptop charger. Price per mAh looks high until you weigh the Anker 523 next to it.

Listing check: Amazon mixes Gen2/3/4. Confirm weight, wattage, and whether you get USB-A or two USB-C ports.

---

4. Anker 523

Best boring 10,000 mAh pack

About $22, 10,000 mAh, 20W USB-C, one USB-A, under 8 oz. No screen, no MagSafe, no 65W laptop port.

Anker 523 on Amazon

What travel subreddits say: “Boring in the best way.” It is the pack people recommend when someone is overbuying a 140W brick for Instagram.

---

5. Baseus 65W 20,000 mAh

Best middle between the 523 and the 737

Retail listings for the 65W 20,000 mAh Baseus sit around 14 oz and ~74 Wh — still under the 100 Wh line — with two USB-C ports and one USB-A. 65W is enough for a MacBook Air or most Windows ultrabooks if the laptop will accept that wattage.

Baseus 65W 20,000 mAh on Amazon

Owner reports like the price. Brand support and counterfeit risk are the usual caveats versus Anker.

---

6. BioLite Charge 40 PD

Best if you already own BioLite camp gear

BioLite’s Charge 40 PD page lists 10,000 mAh / 37 Wh, 9.4 oz, 18W USB-C PD, one USB-C and two USB-A. That is heavier than the Anker 523 at the same energy. You are paying for the outdoor brand, drop-test marketing, and a third port.

BioLite Charge 40 PD on Amazon

---

7. INIU B41-class 10,000 mAh

Best if $18 is the budget and you accept Amazon-brand variance

INIU’s 10,000 mAh travel packs (B41 and siblings) usually add a Lightning port next to USB-C and USB-A. Fine for mixed cables. Build and cell quality vary by listing more than Anker’s.

INIU 10,000 mAh travel power bank on Amazon

Listing check: INIU recycles model letters. Confirm 10,000 mAh (not a 20,000 mAh brick), the port trio, and a visible Wh or UN38.3 mention.

---

How to choose

• Phone only, short days: 5,000–10,000 mAh. MagGo or Anker 523.
• Multi-day with bad outlets: 20,000–24,000 mAh. Baseus 65W or Anker 737.
• Must charge a laptop: 45W+ USB-C PD, and read the Wh. The 737 is the clean “under 100 Wh” laptop answer in this set.
• Grams matter more than ports: Nitecore NB10000, and confirm which generation the listing is.

Buy a brand that prints Wh and safety marks. Skip no-name 30,000 mAh miracles.

For data on arrival, pair the pack with an eSIM comparison. For the rest of the electronics pile, see best travel gadgets. A travel pillow does not need a charger. Your phone does.

---

Care that actually shows up in battery FAQs

Store around 40–60%. Full or empty storage ages lithium cells faster. Anker and others say this in their own support docs.

Heat kills packs. A dashboard in summer is a good way to turn a 86.4 Wh brick into a swollen brick.

If the bag is gate-checked, the pack comes out. That is the FAA/TSA spare-battery rule, not a travel-blog tip.

Replace when the charge count collapses. You notice when a “three charges” pack becomes one. That is enough signal.

Counterfeit Anker and Baseus shells show up in “sold by” lines that are not the brand store. Look at the seller, the UN38.3 / Wh print, and whether the cable in the photos matches what arrives. A jacket pocket is a bad place for a swollen cell. Keep the pack in the cabin bag.

---

Watt-hour limits are from FAA PackSafe and TSA. Pack specs are from manufacturer pages and current listings. Owner comments are from public travel forums. No in-house charge bench. See our about page.