We track 25 popular packs and rank them by how much battery you actually get per dollar — the only number that lets a 5,000 mAh MagSafe puck and a 142,500 mAh power station compete fairly. Prices refresh daily.
30,000 mAh of capacity at one of the lowest sticker prices on the chart — the cheapest joule we track today.
Pocketable 19.2 Wh pack at 12 W — fine for a phone top-up, well under the 100 Wh airline cap.
100 W USB-PD output charges a 13″ MacBook at full speed. Just under the airline cap and the cheapest laptop-grade option we track.
| Rank | Power bank | Capacity | Power | Price | Flags | Cost per Wh | |
|---|---|---|---|---|---|---|---|
| 01 |
VEGER
VEGER Tank 30,000 mAh 22.5W
1× USB-C, 2× USB-A
|
111Wh30,000 mAh | 22.5W | $32.71 | USB-PD |
$0.295 /Wh
cost per watt-hour
|
Buy → |
| 02 |
Biaze
Biaze 30,000 mAh 22.5W
1× USB-C, 2× USB-A
|
111Wh30,000 mAh | 22.5W | $36.06 | USB-PD |
$0.325 /Wh
cost per watt-hour
|
Buy → |
| 03 |
Baseus
Baseus 30,000 mAh 65W Power Bank
1× USB-C, 2× USB-A
|
111Wh30,000 mAh | 65W | $49.61 | USB-PD |
$0.447 /Wh
cost per watt-hour
|
Buy → |
| 04 |
INIU
INIU 20,000 mAh 65W Slim
1× USB-C, 2× USB-A
|
74Wh20,000 mAh | 65W | $38.82 | Carry-onUSB-PD |
$0.525 /Wh
cost per watt-hour
|
Buy → |
| 05 |
RAVPower
RAVPower 26,800 mAh PD 30W
1× USB-C, 2× USB-A
|
99.2Wh26,800 mAh | 30W | $59.87 | Carry-onUSB-PD |
$0.604 /Wh
cost per watt-hour
|
Buy → |
| 06 |
AUKEY
AUKEY 20,000 mAh USB-C 65W
1× USB-C, 2× USB-A
|
74Wh20,000 mAh | 65W | $46.32 | Carry-onUSB-PD |
$0.626 /Wh
cost per watt-hour
|
Buy → |
| 07 |
RAVPower
RAVPower 20,000 mAh PD Pioneer 60W
1× USB-C, 2× USB-A
|
74Wh20,000 mAh | 60W | $48.86 | Carry-onUSB-PD |
$0.660 /Wh
cost per watt-hour
|
Buy → |
| 08 |
Jackery
Jackery Explorer 300
1× AC, 2× USB, 1× USB-C
|
293Wh78,300 mAh | 300W | $196.39 | USB-PD |
$0.670 /Wh
cost per watt-hour
|
Buy → |
| 09 |
INIU
INIU 25,000 mAh 100W 3-port
2× USB-C, 1× USB-A
|
92.5Wh25,000 mAh | 100W | $65.85 | Carry-onUSB-PD |
$0.712 /Wh
cost per watt-hour
|
Buy → |
| 10 |
Anker
Anker 321 PowerCore 5,200 mAh
1× USB-A
|
19.2Wh5,200 mAh | 12W | $16.01 | Carry-on |
$0.832 /Wh
cost per watt-hour
|
Buy → |
| 11 |
Anker
Anker 535 Portable Power Station (PowerHouse 512Wh)
3× AC, 4× USB
|
512Wh142,500 mAh | 500W | $439.19 | USB-PD |
$0.858 /Wh
cost per watt-hour
|
Buy → |
| 12 |
UGREEN
UGREEN 145W 25,000 mAh Power Bank
2× USB-C, 1× USB-A
|
92.5Wh25,000 mAh | 145W | $91.97 | Carry-onUSB-PD |
$0.994 /Wh
cost per watt-hour
|
Buy → |
| 13 |
Anker
Anker Nano Power Bank 10,000 mAh
1× USB-C (built-in cable)
|
36Wh10,000 mAh | 30W | $36.36 | Carry-onUSB-PD |
$1.010 /Wh
cost per watt-hour
|
Buy → |
| 14 |
Sharge
Sharge Flow 10,000 mAh 30W
1× USB-C, 1× USB-A
|
37Wh10,000 mAh | 30W | $39.55 | Carry-onUSB-PD |
$1.069 /Wh
cost per watt-hour
|
Buy → |
| 15 |
Baseus
Baseus Blade 100W 20,000 mAh
2× USB-C, 2× USB-A
|
72Wh20,000 mAh | 100W | $78.19 | Carry-onUSB-PD |
$1.086 /Wh
cost per watt-hour
|
Buy → |
| 16 |
Anker
Anker 737 Power Bank (PowerCore 24K)
2× USB-C, 1× USB-A
|
88.8Wh24,000 mAh | 140W | $98.09 | Carry-onUSB-PD |
$1.105 /Wh
cost per watt-hour
|
Buy → |
| 17 |
Anker
Anker Laptop Power Bank 25,000 mAh 165W
2× USB-C built-in, 1× USB-C, 1× USB-A
|
92.5Wh25,000 mAh | 165W | $127.10 | Carry-onUSB-PD |
$1.374 /Wh
cost per watt-hour
|
Buy → |
| 18 |
UGREEN
UGREEN Nexode 25,000 mAh 200W
2× USB-C, 1× USB-A
|
92.5Wh25,000 mAh | 200W | $151.56 | Carry-onUSB-PD |
$1.638 /Wh
cost per watt-hour
|
Buy → |
| 19 |
Mophie
Mophie Powerstation Pro XL
2× USB-C, 1× USB-A
|
92.5Wh25,000 mAh | 100W | $152.10 | Carry-onUSB-PD |
$1.644 /Wh
cost per watt-hour
|
Buy → |
| 20 |
Shargeek
Shargeek Storm 2 25,600 mAh
2× USB-C, 1× USB-A, 1× DC, LCD
|
94.7Wh25,600 mAh | 100W | $157.69 | Carry-onUSB-PD |
$1.665 /Wh
cost per watt-hour
|
Buy → |
| 21 |
Anker
Anker Prime 27,650 mAh Power Bank
2× USB-C, 1× USB-A
|
99.5Wh27,650 mAh | 250W | $179.79 | Carry-onUSB-PD |
$1.806 /Wh
cost per watt-hour
|
Buy → |
| 22 |
Anker
Anker 313 Magnetic Wireless 5,000 mAh
1× USB-C, MagSafe
|
18.5Wh5,000 mAh | 12W | $35.58 | Carry-on |
$1.923 /Wh
cost per watt-hour
|
Buy → |
| 23 |
Zendure
Zendure SuperTank Pro 27,000 mAh
2× USB-C, 2× USB-A, LCD
|
99.9Wh27,000 mAh | 100W | $199.26 | Carry-onUSB-PD |
$1.995 /Wh
cost per watt-hour
|
Buy → |
| 24 |
Anker
Anker Prime 9,600 mAh 65W
2× USB-C, 1× USB-A
|
35.5Wh9,600 mAh | 65W | $73.20 | Carry-onUSB-PD |
$2.062 /Wh
cost per watt-hour
|
Buy → |
| 25 |
Anker
Anker 622 Magnetic Battery (MagGo)
1× USB-C, MagSafe-compatible
|
18.5Wh5,000 mAh | 12W | $49.29 | Carry-on |
$2.664 /Wh
cost per watt-hour
|
Buy → |
One number, no tricks.
Watt-hours measure the actual energy stored — the same unit on your electricity bill. Milliamp-hours, by contrast, only make sense at a stated voltage, which manufacturers shift around to make the headline number look bigger. Watt-hours sidestep the trickery; dividing by retail price gives the true cost of a unit of portable energy.
Prices come from Amazon's official Product Advertising API and refresh once a day. We don't show real-time prices — always click through to confirm before buying. As an Amazon Associate we earn from qualifying purchases. Non-Amazon links may also earn a commission. The ranking itself is deterministic from the formula above and has no human override.
A 20,000 mAh power bank at 3.7 V cell voltage actually holds 74 Wh of energy. A "20,000 mAh" laptop bank at 3.85 V holds about 77 Wh. Marketing copy uses the higher mAh of the internal cells, but you deliver fewer mAh at the 5 V USB output. Watt-hours collapse the confusion into one comparable number.
The TSA and most international airlines allow lithium-ion power banks under 100 Wh in carry-on baggage with no special permission. Between 100 and 160 Wh you need airline approval. Anything above 160 Wh is forbidden on passenger flights — so the Jackery Explorer 300 and Anker 535 power stations can't fly.
Once a day, via the Amazon Product Advertising API. We display the last refreshed price; the checkout price may differ — always click through to confirm before buying.
If you click a Buy link and complete a purchase, we earn a small affiliate commission at no cost to you. Rankings are deterministic from the $/Wh formula and cannot be paid for. We have no incentive to recommend a particular model over another.
We track popular models with verifiable specs. If a power bank you love is missing, email us the manufacturer spec sheet URL and we'll add it.