What the rated 166.5 Wh is really worth
The Xtorm Fuel Series 5 67 W 45,000 mAh lists a nominal capacity of 166.5 Wh, calculated from its 45,000 mAh of cells at a conventional 3.7 V. Across five different output settings, it returns between 142.6 and 158.1 Wh, or 86% to 95% of that nominal figure depending on the load.
The mechanism comes down to voltage conversion: stepping up from a cell voltage near 3.6 to 4.2 V to reach 20 V on the output costs more energy than staying at 5 or 9 V. Output is highest at low voltage, up to 95% at 9 V and 1 A, and lowest at high voltage and high current, 86% at 20 V and 3 A, which happens to be the exact setup used to fast-charge a laptop.
Across all five settings, the average works out to around 152.7 Wh, the figure used throughout this review as the real-world output reference.
The 67 W port backs up its claim, but only one of three does
The main USB-C port delivers up to 67 W of Power Delivery, with extended PPS support from 3.3 to 20.3 V and up to 3 A, an unusually wide range for this type of product. This port backs up its rated spec without reservation.
The other two ports are considerably more modest: the second USB-C port tops out at 27 W (PPS from 3.3 to 11 V), and the USB-A port at 18 W with Quick Charge 3.0. That means charging two laptops at full speed at the same time is not possible: only one device at a time gets the full 67 W.
No independent test has confirmed how the total power budget behaves when all three ports are in use at once: that still needs checking case by case, depending on the exact mix of devices plugged in.
Pass-through and simultaneous charging: a real asset on the road
Pass-through charging lets the pack recharge itself from an outlet while powering one or more devices plugged into its three ports at the same time. That is genuinely useful on an extended trip: plug the pack and a laptop into the same wall charger overnight, and find both fully charged in the morning, without running two separate charging sessions back to back.
The manufacturer also builds in protection against overcharging, short circuits, and overheating, mechanisms that are standard on this type of product by now but still a necessary baseline for a battery carried in a bag every day.
The claim: a phone charged nine times, a laptop twice
The manufacturer claims enough for about nine full phone charges or two laptop charges. That kind of figure generally assumes output close to 100% of nominal capacity against reference batteries (roughly 18 to 20 Wh for a recent phone, 55 to 60 Wh for a laptop). With real-world output of 86% to 95% rather than 100%, the number of full recharges actually achieved lands a bit below the claim, in a proportion directly tied to the output gap covered above.
That gap does not undercut the claimed ballpark figure: the manufacturer is broadly in the right neighborhood. It is simply a reminder that a multiple-recharges number is always a theoretical estimate, not a guarantee, and one that is especially sensitive to the exact battery size of the device being charged and the charging power actually used.
Recharging the pack itself: 3.5 hours claimed, about 4 hours in practice
The manufacturer claims a full recharge in 3.5 hours with a sufficiently powerful charger. In practice, at 60 W or more on the input, that time comes closer to 4 hours, roughly 15% longer than claimed.
The gap between the two figures still works in its favor: fully recharging 166.5 Wh in 4 hours is fast for this capacity class, where several similarly sized rivals need 6 to 10 hours. The gap versus the manufacturer's claim is still worth knowing before buying, especially for anyone planning an overnight recharge ahead of a trip.
The main trade-off: 1.59 lb and a size you notice
At 1.59 lb (722 g) for 7.1 x 3.9 x 1.2 in (180 x 100 x 30mm), the Xtorm Fuel Series 5 67 W 45,000 mAh is an object you feel in an already-packed bag. That is the direct, expected trade-off of a capacity close to double that of the most common power banks: at equal energy density, doubling the capacity cannot come at the same weight.
The size still stays reasonable relative to the energy it carries, and packing nearly twice the capacity of a typical power bank into one unit accounts for most of the added heft rather than any lack of engineering. The trade-off is coherent, but very real for anyone who values everyday lightness.
The LED display: useful, but bare-bones
An LED display constantly shows the remaining charge percentage, a genuine plus over the simple stepped light indicators, in 20% or 25% increments, that many rivals still use. The reading is immediate and accurate to the percentage point.
This display still stays bare-bones next to those of some direct rivals at a similar price point, which also show live wattage on each port, an estimated time to full charge, or a cell-health indicator. None of that is available here: only the overall percentage is shown.
One thing to know before buying: air travel
At 166.5 Wh, this pack is well above the 100 Wh threshold generally allowed in carry-on without prior airline approval, and even above the 160 Wh ceiling beyond which no special approval helps anymore. The manufacturer states this explicitly on its own official product page: it is not built for air travel.
Xtorm's lineup offers a direct alternative for anyone who needs a large capacity that can still fly in carry-on: the same Fuel Series 5, in a 27,000 mAh version with the same 67 W power, tops out at 99.9 Wh, just under the 100 Wh limit. The trade-off is clear: roughly 40% less capacity, in exchange for carry-on use that the 45,000 mAh version rules out entirely.
Against the direct competition: capacity versus power
In the segment of very-high-capacity power banks that can also charge a laptop, the Xtorm Fuel Series 5 67 W 45,000 mAh runs up against several well-known rivals.
| Criterion | Xtorm Fuel Series 5 67 W 45,000 mAh | Anker 737 Power Bank | Anker A1695 |
|---|---|---|---|
| Claimed capacity | 45,000 mAh (166.5 Wh) | 24,000 mAh (86.4 Wh) | 25,000 mAh (90 Wh) |
| Maximum power | 67 W | 140 W | 165 W |
| Output | 142.6 to 158.1 Wh (86% to 95%) | 72.6 Wh (~84%) | 74 Wh (~82%) |
| Weight | 1.59 lb (722 g) | 1.39 lb (630 g) | 1.31 lb (595 g) |
| Carry-on legal | No (166.5 Wh) | Yes (86.4 Wh) | Yes (90 Wh) |
The Xtorm stands out clearly on capacity, close to double that of these two direct rivals. Its output, between 86% and 95%, is also proportionally the highest of the three, even though the raw power on tap (67 W) is well below the 140 W and 165 W of the two Anker units, which charge a demanding laptop faster. Weight tracks capacity closely: the Xtorm is the heaviest of the three, but not out of proportion given its capacity edge. For a use case where battery life matters more than charging speed, it keeps a clear edge; for anyone charging a power-hungry laptop and wanting to stay carry-on legal, the two Anker units remain the more versatile picks.
Build quality, warranty, and reliability
The shell is made from GRS-certified (Global Recycled Standard) recycled plastic, an environmental approach that does not come at the expense of sturdiness: the finish holds up close to premium for this price range.
On warranty, the manufacturer offers a two-year base warranty, extendable to three years (2+1) through a free product registration on its official site, a step worth not skipping to get the full benefit. No official recall covers this model as of this writing.
This version makes no claim to any water or dust resistance rating. Xtorm's wider lineup does include separate, newer models, of different capacity, built for resistance to water splashes and dust: don't confuse them with this 45,000 mAh version, which offers none of that.
Who it's for, who it isn't
It's a fit for anyone heading out for several days without easy access to an outlet (car, RV, train, a multi-day backpacking trip), who wants a comfortable energy reserve for a phone and a laptop at once, and who accepts the weight trade-off in exchange for very comfortable battery life.
It's not a fit for anyone who flies regularly and needs to carry their power bank on board (the 27,000 mAh version in the same lineup is the right call then), anyone who wants lightness above all for everyday city use, or anyone who needs to charge two laptops at full speed at the same time.
