Calculators
amazon.co.uk
Laptop power banks
price per 100 Wh How we compare Buying guide ↓
- Output that matters
- 65–140 W on one port
- Cable above 60 W
- 5 A e-marked; EPR at 140 W
- Carry-on without approval
- Up to 100 Wh · 27,000 mAh
- Charges, 74–100 Wh bank
- One 13-inch, half a 16-inch
Filters (1)
| Product | £ / 100 Wh ▲ | Max output (W) | Package | Capacity | Kind | Rating · Reviews |
|---|
| Product | £ / 100 Wh ▲ | Max output (W) | Package | Capacity | Kind | Rating · Reviews | |
|---|---|---|---|---|---|---|---|
| 65W Laptop Power Bank, 25000mAh 101W Total Fast Charging Portable Charger 25,000 mAh · 92.5 Wh · 3.9 / 5 Max output (W): 101 Capacity, output & details
| £42.26per 100 WhBest value | 101 | £39.09Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 3.9 (40) | |
| VENTION 27000 mAh 140W Power Bank Fast Charging 3-Port Laptop Portable Charger with Smart Digital Display, PD3.1, for Dell HP Laptops, Macbook Pro, iPhone 17 16 15 14, iPad Pro, Galaxy S24, Grey 27,000 mAh · 99.9 Wh · 4 / 5 Max output (W): 140 Capacity, output & details
| £50.04per 100 Wh | 140 | £49.99Package price | 27,000 mAh · 99.9 Wh | Laptop (65 W+) | 4 (123) | |
| UGREEN Nexode 140W 25000mAh Power Bank 3-Port USB C Portable Charger 25,000 mAh · 92.5 Wh · 4.4 / 5 Max output (W): 140 Capacity, output & details
| £51.32per 100 Wh | 140 | £47.47Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.4 (7.9k) | |
| INIU Laptop Power Bank, Compact 27000mAh 140W Fast Charging Battery Pack 27,000 mAh · 99.9 Wh · 4.5 / 5 Max output (W): 140 Capacity, output & details
| £51.98per 100 Wh | 140 | £51.93Package price | 27,000 mAh · 99.9 Wh | Laptop (65 W+) | 4.5 (2.6k) | |
| INIU Laptop PowerBank, 140 W 25000 mAh Power Bank, Fast Charging, Small External Mobile Phone Batteries, USB-C Input & Output for MacBook, Surface, iPad, Camera, DJI, iPhone 16 15 14, Travel, Hiking 25,000 mAh · 92.5 Wh · 4.4 / 5 Max output (W): 140 Capacity, output & details
| £57.32per 100 Wh | 140 | £53.02Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.4 (291) | |
| ASPERX 162.5W Laptop Power Bank, 27600mAh Aluminum Portable Charger PD3.1 27,600 mAh · 102.1 Wh · 4.4 / 5 Max output (W): 162.5 Capacity, output & details
| £57.41per 100 Wh | 162.5 | £58.63Package price | 27,600 mAh · 102.1 Wh | Laptop (65 W+) | 4.4 (663) | |
| UGREEN Nexode 165W 25000mAh Power Bank Fast Charging with 2 Built-in Cables 25,000 mAh · 92.5 Wh · 4.6 / 5 Max output (W): 165 Capacity, output & details
| £57.50per 100 Wh | 165 | £53.19Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.6 (803) | |
| Baseus EnerGeek Laptop Powerbank 145W 20800mAh, External Battery with 2 x USB-C PD 3.0 100 W Max Fast Charge, Compatible with Dell, HP, SteamDeck, iPhone 16/15/14/13, iPad 20,800 mAh · 77 Wh · 4.1 / 5 Max output (W): 145 Capacity, output & details
| £58.46per 100 Wh | 145 | £44.99Package price | 20,800 mAh · 77 Wh | Laptop (65 W+) | 4.1 (99) | |
| 140W Laptop Power Bank, 25000mAh with TFT Smart Digital Display 25,000 mAh · 92.5 Wh · 4.2 / 5 Max output (W): 140 Capacity, output & details
| £58.53per 100 Wh | 140 | £54.14Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.2 (219) | |
| UGREEN Nexode 200W 25000mAh Power Bank Smart Display Portable Charger 25,000 mAh · 92.5 Wh · 4.6 / 5 Max output (W): 200 Capacity, output & details
| £63.75per 100 Wh | 200 | £58.97Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.6 (3.4k) | |
| UGREEN Nexode 145W 20000mAh Power Bank 3-Port Built-in USB C Cable 20,000 mAh · 74 Wh · 4.6 / 5 Max output (W): 145 Capacity, output & details
| £64.11per 100 Wh | 145 | £47.44Package price | 20,000 mAh · 74 Wh | Laptop (65 W+) | 4.6 (1.2k) | |
| Dellonda 140W Power Bank, 27000mAh, 3-Port Portable Charger, Smart Digital Display, USB-C PD3.1 - DL168 27,000 mAh · 99.9 Wh · 5 / 5 Max output (W): 140 Capacity, output & details
| £66.05per 100 Wh | 140 | £65.98Package price | 27,000 mAh · 99.9 Wh | Laptop (65 W+) | 5 (1) | |
| EcoFlow Laptop Power Bank 25000mAh 170W, Built-in Two 100W Retractable Cables, Portable Charger 100W USB C Battery Pack Travel Charger for iPhone 17/16/15 Series, Samsung Galaxy, MacBook, iPad, Black 25,000 mAh · 92.5 Wh · 4.5 / 5 Max output (W): 170 Capacity, output & details
| £66.75per 100 Wh | 170 | £61.74Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.5 (96) | |
| EcoFlow Laptop Power Bank 25000mAh 170W with Dual 140W USB-C Ports, Portable Charger 140W USB C Battery Pack Travel Charger for iPhone 17/16/15 Series, Samsung Galaxy, MacBook, iPad, Black 25,000 mAh · 92.5 Wh · 4.3 / 5 Max output (W): 170 Capacity, output & details
| £66.75per 100 Wh | 170 | £61.74Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.3 (110) | |
| UGREEN Nexode Power Bank 20000mAh 130W Fast Charging, 3-Port USB C Portable Charger Smart Digital Display Battery Pack Compatible with Dell, HP, ASUS, iPad,iPhone 18 Pro/Pro Max/Duo/17/16, Galaxy S26 20,000 mAh · 74 Wh · 4.5 / 5 Max output (W): 130 Capacity, output & details
| £67.51per 100 Wh | 130 | £49.96Package price | 20,000 mAh · 74 Wh | Laptop (65 W+) | 4.5 (4.8k) | |
| ASPERX 145W 24000mAh Power Bank for Laptop & Phone, USB-C Portable Charger 24,000 mAh · 88.8 Wh · 4.4 / 5 Max output (W): 145 Capacity, output & details
| £67.56per 100 Wh | 145 | £59.99Package price | 24,000 mAh · 88.8 Wh | Laptop (65 W+) | 4.4 (116) | |
| CUKTECH 15 Ultra Power Bank 20000mAh 165W Fast Charging 3-Port USB C Portable Charger Fast-Self-Charging TFT Digital Display Battery Pack Compatible with MacBook Pro/Air/iPad/iPhone 16/Samsung/Dell 20,000 mAh · 74 Wh · 4.6 / 5 Max output (W): 165 Capacity, output & details
| £68.91per 100 Wh | 165 | £50.99Package price | 20,000 mAh · 74 Wh | Laptop (65 W+) | 4.6 (512) | |
| UGREEN Nexode 165W 20000mAh Power Bank 3-Way Output & Retractable Cable 20,000 mAh · 74 Wh · 4.6 / 5 Max output (W): 165 Capacity, output & details
| £70.23per 100 Wh | 165 | £51.97Package price | 20,000 mAh · 74 Wh | Laptop (65 W+) | 4.6 (2k) | |
| UGREEN Nexode 200W 25000mAh Power Bank Smart Display and Retractable Cable 25,000 mAh · 92.5 Wh · 4.4 / 5 Max output (W): 200 Capacity, output & details
| £70.26per 100 Wh | 200 | £64.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.4 (471) | |
| 140W Laptop Power Bank, 25000mAh with TFT Smart Digital Display 25,000 mAh · 92.5 Wh · 4.2 / 5 Max output (W): 140 Capacity, output & details
| £71.88per 100 Wh | 140 | £66.49Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.2 (219) | |
| CUKTECH 20 Laptop PowerBank 140W, 25000mAh Power Bank Fast Charging with 3 Ports, Portable Charger USB C PPS PD3.0, Digital Display, High Capacity Battery Pack for Dell, iPad, iPhone 15Pro etc 25,000 mAh · 92.5 Wh · 4.5 / 5 Max output (W): 140 Capacity, output & details
| £73.50per 100 Wh | 140 | £67.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.5 (578) | |
| JUOVI 187W Power Bank 25000mAh with Detachable USB C Cable 25,000 mAh · 92.5 Wh · 4.8 / 5 Max output (W): 187 Capacity, output & details
| £74.58per 100 Wh | 187 | £68.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.8 (115) | |
| Anker Power Bank, 25,000mAh Travel Essential with 165W Total Output 25,000 mAh · 92.5 Wh · 4.5 / 5 Max output (W): 165 Capacity, output & details
| £75.66per 100 Wh | 165 | £69.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.5 (12.6k) | |
| Anker Power Bank, 25,000mAh Travel Essential with 165W Total Output 25,000 mAh · 92.5 Wh · 4.5 / 5 Max output (W): 165 Capacity, output & details
| £75.66per 100 Wh | 165 | £69.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.5 (12.6k) | |
| INIU 140W 25000mAh Portable Charger for Laptop & Phone, Mini Power Bank with PD QC Fast Charging (USB-C in/Out) - High Capacity Electronics Battery Pack for iPad, Samsung, Travel, Camping 25,000 mAh · 92.5 Wh · 4.4 / 5 Max output (W): 140 Capacity, output & details
| £83.23per 100 Wh | 140 | £76.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.4 (169) | |
| VENTION Laptop Power Bank 200W 27000mAh, Fast Charging USB-C Powerbank 3-Port Portable Charger with Emoji Animation, Battery Pack for Laptops, MacBook Pro, iPhone 17 16 15, iPad, Galaxy S25 27,000 mAh · 99.9 Wh · 4.6 / 5 Max output (W): 200 Capacity, output & details
| £85.08per 100 Wh | 200 | £84.99Package price | 27,000 mAh · 99.9 Wh | Laptop (65 W+) | 4.6 (20) | |
| JUOVI 222W Power Bank 25000mAh with Detachable USB C Cable 25,000 mAh · 92.5 Wh · 4.6 / 5 Max output (W): 222 Capacity, output & details
| £85.39per 100 Wh | 222 | £78.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.6 (110) | |
| SHARGE 170W 25000mAh Laptop Power Bank, Fast Charging Portable Charger 25,000 mAh · 92.5 Wh · 4.4 / 5 Max output (W): 170 Capacity, output & details
| £86.46per 100 Wh | 170 | £79.98Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.4 (23) | |
| EcoFlow Laptop Power Bank 27650mAh 300W, Built-in 140W Retractable Cable, 4-Port Portable Charger 140W Battery Pack Travel Charger, For iPhone 17/16/15 Series, Samsung Galaxy, MacBook, iPad 27,650 mAh · 102.3 Wh · 4 / 5 Max output (W): 300 Capacity, output & details
| £88.06per 100 Wh | 300 | £90.09Package price | 27,650 mAh · 102.3 Wh | Laptop (65 W+) | 4 (77) | |
| Xiaomi 212W Power Bank 25000mAh, PD Fast Charging Battery Pack, USB C 25,000 mAh · 92.5 Wh · 4.2 / 5 Max output (W): 212 Capacity, output & details
| £91.88per 100 Wh | 212 | £84.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.2 (156) | |
| JUOVI 187W Power Bank 25000mAh Portable Charger Fast Charging with Detachable USB-C Cable 25,000 mAh · 92.5 Wh · 4.7 / 5 Max output (W): 187 Capacity, output & details
| £91.88per 100 Wh | 187 | £84.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.7 (94) | |
| VENTION Laptop Power Bank 25000mAh 200W Fast Charging Grey 25,000 mAh · 92.5 Wh · 4.8 / 5 Max output (W): 200 Capacity, output & details
| £97.29per 100 Wh | 200 | £89.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.8 (40) | |
| VENTION Laptop Power Bank 25000mAh 200W Fast Charging Silver 25,000 mAh · 92.5 Wh · 4.8 / 5 Max output (W): 200 Capacity, output & details
| £97.29per 100 Wh | 200 | £89.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.8 (40) | |
| JUOVI Power Bank 25000mAh 222W Total Output with Detachable USB-C Cable 25,000 mAh · 92.5 Wh · 4.7 / 5 Max output (W): 222 Capacity, output & details
| £101.07per 100 Wh | 222 | £93.49Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.7 (108) | |
| Belkin UltraCharge 25000mAh 158W Power Bank with Integrated USB-C Cable 25,000 mAh · 92.5 Wh · 4.6 / 5 Max output (W): 158 Capacity, output & details
| £108.10per 100 Wh | 158 | £99.99Package price | 25,000 mAh · 92.5 Wh | Laptop (65 W+) | 4.6 (124) | |
| IFOOTAGE PD140H Battery Grip, 140W 27000mAh Power bank Compatible with Sliders, LED Video Lights, Cameras, Phones, iPads, Laptops and Other Digital Devices 27,000 mAh · 99.9 Wh · 4.7 / 5 Max output (W): 140 Capacity, output & details
| £125.03per 100 Wh | 140 | £124.90Package price | 27,000 mAh · 99.9 Wh | Laptop (65 W+) | 4.7 (5) | |
| SHARGE Shargeek 140 Power Bank 20000mah 140W Max Output for Laptop 20,000 mAh · 74 Wh · 4.6 / 5 Max output (W): 140 Capacity, output & details
| £129.72per 100 Wh | 140 | £95.99Package price | 20,000 mAh · 74 Wh | Laptop (65 W+) | 4.6 (256) | |
| Anker Prime 27,650mAh Power Bank (250W), 3-Port Portable Charger, Smart App, Compatible with iPhone 16/15/14/13 Series, Samsung, Dell, AirPods, and More (Charging Base Not Included) 27,650 mAh · 102.3 Wh · 4.4 / 5 Max output (W): 250 Capacity, output & details
| £136.84per 100 Wh | 250 | £139.99Package price | 27,650 mAh · 102.3 Wh | Laptop (65 W+) | 4.4 (3.5k) | |
| SHARGE SHARGEEK 170 Power Bank 170W Total Output 24,000mAh for Laptops 24,000 mAh · 88.8 Wh · 4.6 / 5 Max output (W): 170 Capacity, output & details
| £157.65per 100 Wh | 170 | £139.99Package price | 24,000 mAh · 88.8 Wh | Laptop (65 W+) | 4.6 (110) | |
| SHARGE SHARGEEK 170 Power Bank 170W Total Output 24,000mAh for Laptops 24,000 mAh · 88.8 Wh · 4.6 / 5 Max output (W): 170 Capacity, output & details
| £157.65per 100 Wh | 170 | £139.99Package price | 24,000 mAh · 88.8 Wh | Laptop (65 W+) | 4.6 (110) | |
| Anker Prime Power Bank, 26,250mAh 300W Fast Charging 26,250 mAh · 97.1 Wh · 4.6 / 5 Max output (W): 300 Capacity, output & details
| £184.30per 100 Wh | 300 | £179.00Package price | 26,250 mAh · 97.1 Wh | Laptop (65 W+) | 4.6 (1.6k) | |
| EcoFlow Rapid Pro X Powerbank 27650mAh 320W with TFT-display, for laptops 27,650 mAh · 102.3 Wh · 4.4 / 5 Max output (W): 320Most powerful Capacity, output & details
| £185.71per 100 Wh | 320Most powerful | £189.99Package price | 27,650 mAh · 102.3 Wh | Laptop (65 W+) | 4.4 (17) | |
| Anker Prime Power Bank and Charging Base, 20,100mAh 220W Max Portable Charger with Base for 6 Devices, Two-Way Charging, Flight-Approved, App Control, For iPhone 17/16/15 Series, and More 20,100 mAh · 74.4 Wh · 4.8 / 5 Max output (W): 220 Capacity, output & details
| £201.67per 100 Wh | 220 | £149.98Package price | 20,100 mAh · 74.4 Wh | Laptop (65 W+) | 4.8 (29) | |
| Anker Prime Power Bank and Charging Base, 26,250mAh 300W Max Portable Charger with Base for 6 Devices, Two-Way Charging, Hand-Luggage Approved, App Control, For Laptop, iPhone 17/16/15 Series 26,250 mAh · 97.1 Wh · 4.5 / 5 Max output (W): 300 Capacity, output & details
| £257.39per 100 Wh | 300 | £249.99Package price | 26,250 mAh · 97.1 Wh | Laptop (65 W+) | 4.5 (176) | |
| SoundCore Anker Boom 2+2 Channels BassUp 140W Bluetooth Speaker 20 Hours Fast Charge, IPX7 Waterproof, RGB Lighting, USB-C Power Bank for Camping, Beach, Garden (Refurbished) — · 4.6 / 5 Max output (W): 140 Capacity, output & details
| —per 100 Wh | 140 | £129.00Package price | — | Laptop (65 W+) | 4.6 (320) |
£67.55 per 100 Wh median of 93 in-stock listings.
Per 100 Wh of nominal cell energy: mAh × 3.7 V, or the stated Wh where it agrees within 20 %; power stations by their stated Wh. ~ marks a stated Wh set aside, or a title that names several capacities.
Laptop power banks: what to know before you buy
A 20,000–27,000 mAh bank with at least one USB-C port that negotiates USB Power Delivery at 65 W or more; 100 W and 140 W are the common ceilings, and 250–300 W models exist. Buyers get three things wrong: a 74–100 Wh bank is about one charge of a 13-inch laptop and half a charge of a 16-inch one; the laptop’s port, the cable and the bank each cap the speed, so “140 W” on the box rarely reaches the laptop; and the bank’s own input speed decides whether it refills over lunch or overnight.
Specs and terms that matter
Output per port and combined
65, 100 or 140 W on the main USB-C port is the figure that matters; a combined figure such as “165 W” is often 100 W on one port plus 65 W on another, never 165 W to one laptop. Most banks drop the laptop port to a lower profile when a phone is plugged in too.
PD 3.0 vs PD 3.1 EPR
USB PD 3.0 tops out at 100 W (20 V, 5 A). PD 3.1 Extended Power Range adds 28, 36 and 48 V for up to 240 W; 140 W needs the 28 V EPR profile on bank, cable and laptop alike. PPS and AVS are the adjustable-voltage modes for phones and newer laptops.
Cable rating
Any USB-C cable carries 3 A, 60 W at 20 V. Above 60 W the cable must be 5 A e-marked (sold as “100 W”); 140–240 W needs an EPR-marked 5 A cable. A 100 W bank with a thin cable charges a laptop at 60 W, and users with a USB tester often find half their cables are the slow kind.
Input watts (recharge)
65 W input refills a 100 Wh bank in about 2 h, 100–140 W in about 1 h; some banks take two chargers at once. The input rating needs a wall charger and cable that can supply it. A crowd-sourced test of ten laptop banks found a 20-minute lunch recharge returns about 45 Wh at best, because most throttle after 20 minutes at 140 W.
Energy
20,000 mAh is 74 Wh, 24,000–26,000 mAh 86–96 Wh, 27,000 mAh about 100 Wh. Above 100 Wh airline approval is needed, which is why laptop banks cluster at 24,000–27,000 mAh.
Sustained vs peak output
Some banks hold the top figure for five minutes, then throttle on heat; reviews that log the curve show it. Voltage ripple and noise under load separate good electronics from poor ones.
Weight
500–700 g is normal for 25,000 mAh at 140–165 W; the lightest 20,000 mAh banks are about 325 g but at lower watts. A 300 W 27,000 mAh bank is 600–700 g.
Display and ports
A live watts-in and watts-out display is standard here; it shows whether the laptop negotiated 65 or 100 W. Two USB-C and one USB-A is the norm, a third USB-C on 25,000 mAh and up; Bluetooth telemetry on premium models.
Before you buy
- Find the laptop’s draw: a MacBook Air or 13-inch ultrabook 30–65 W, a 14-inch MacBook Pro 70–96 W, a 16-inch MacBook Pro 140 W over its MagSafe 3 cable; most gaming laptops charge from USB-C slowly or not at all.
- Decide between 65 and 100 W: in forum consensus 65 W keeps a MacBook Pro working under normal load and 100 W keeps it charging under load.
- Check the cable in the box: 5 A e-marked for anything above 60 W, EPR-marked for 140 W; buy one if the box does not say.
- Read the input watts and whether the wall charger at home can supply them; 140 W input needs a 140 W charger and an EPR cable.
- Keep the Wh under 100 if the bank will fly: 24,000–27,000 mAh is the usual ceiling, and 30,000 mAh laptop banks need airline approval.
- Weigh it against the charger: a bank that weighs more than the laptop’s charger loses to a charger plus a 10,000 mAh bank in most travel threads.
- Check whether the laptop port holds its output when a phone is plugged in; the per-port figures under load are in the fine print.
- Check the model number against the maker’s recall page and read the warranty term, 12–24 months on this class.
Myths and mistakes
- A 140 W bank does not charge a 16-inch MacBook Pro at 140 W over USB-C: that speed uses the MagSafe 3 cable, USB-C stays at the 100 W PD 3.0 ceiling, and the Mac’s own curve falls below 100 W after about 22 minutes anyway.
- A 100 Wh bank does not fully recharge every laptop: about 85 Wh arrives, roughly 1.2 charges of a MacBook Air and 0.8 of a 16-inch Pro.
- A charger that is also a power bank at 140 W and 20,000 mAh does not exist; the hybrids are 65 W and 10,000 mAh, and bulky in a wall socket.
- “165 W” in a title is a combined figure: 100 W on one port and 65 W on another, never 165 W to a laptop.
- Gaming laptops are not laptop-bank territory: most need 180–240 W from a barrel charger, and a 100 W USB-C bank only slows the drain.
- A 3C mark, not a UL mark, is what China’s Civil Aviation Administration has required on domestic flights since 28 June 2025; travellers transiting China report banks without it being confiscated.
Questions people ask
How many watts does my laptop need from a power bank?
30–65 W for thin laptops and a MacBook Air, 96–100 W for 14- and 16-inch pro models, 140 W only for the 16-inch MacBook Pro over its MagSafe 3 cable. A laptop draws what it needs; a 100 W bank on a 45 W laptop runs at 45 W.
Will a 65 W power bank charge a 100 W laptop?
Yes, more slowly; under heavy load the battery may still drain, but the runtime is extended. In forum consensus 65 W keeps a MacBook Pro working under normal load, and 100 W keeps it charging while working.
Which cable do I need for a 100 W or 140 W power bank?
A 5 A e-marked cable (sold as “100 W”) for 65–100 W; a 240 W EPR-marked cable for 140 W. A plain USB-C cable carries 60 W, whatever the bank says.
How much laptop runtime does a 20,000 mAh bank give?
Roughly one full charge of a 13-inch laptop (50–70 Wh battery) and half a charge of a 16-inch one (100 Wh), after 10–15 % losses. A 27,000 mAh bank at about 100 Wh gives about 1.2 charges of a MacBook Air.
Can I fly with a 24,000 or 26,800 mAh laptop power bank?
Yes, in carry-on: both are under 100 Wh (86–99 Wh). A 30,000 mAh bank at 111 Wh needs the airline’s approval, two at most, under the ICAO tiers the FAA and EASA follow. Since 27 March 2026 ICAO’s addendum says the bank should not be used or recharged on board; airlines differ, and the airline’s current rule applies.
How fast does a laptop power bank recharge itself?
About the Wh divided by the input watts: 100 Wh at 65 W in about 2 h, at 140 W in about 1 h, plus the taper at the end. Only with a charger and cable that can supply the input rating.
Does a laptop power bank charge a phone too?
Yes, from its second USB-C or USB-A port. Check whether the laptop port drops its output when both are used; most banks split the total between ports.
Sources: USB Power Delivery: profiles, cables and EPR (reference), ChargerLAB: MacBook Pro 16-inch M4 Pro charging review, FAA PackSafe: lithium batteries, ICAO Technical Instructions 2025–2026, Addendum No. 1 (27 March 2026), CAAC 3C requirement for power banks on domestic flights (Hangzhou government portal). Reviewed 19 Oct 2026. General information compiled from public sources, not safety or legal advice. Airline rules change often; your airline’s current rule is the one that applies.
Work out a price per Wh: free power bank calculators · mAh to Wh calculator