Buying guide 01 / USB-C power banks

Choose a power bank: energy, ports and recharging

Match stored energy, power profiles and the complete cable and recharge workflow.

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Start with energy, not a phone-charge promise

A capacity in milliamp-hours has a voltage basis. The NITECORE specification separately gives stored watt-hours and rated USB delivery at different loads. Those quantities should not be substituted for each other. Use the exact pack label and documented values; where watt-hours were not verified, the comparison leaves them unknown instead of choosing a familiar cell voltage.

NITECORE energy and delivery specifications

Read single-port and shared modes separately

A1695 changes its total when more devices are attached. NITECORE Gen4 likewise documents a lower shared limit than its single-output maximum. Count the devices that need charging at the same time and inspect the particular allocation. Individual port maxima cannot be added to create a new unsupported total.

Anker sharing conditions

Plan the recharge between uses

Output and input limits differ. UGREEN 35524 can offer more power through USB-C1 than it accepts while recharging. High input peaks on other packs can require two inputs or a particular charge level. Choose a charger and cable for the documented input path, and do not promise a full recharge time from the peak alone.

UGREEN input and output table

Check the exact generation and accessories

Built-in cables reduce the need for one loose cable, but their connector types still have to fit the device. Charging bases, wall chargers and bundles need their own selection. This category keeps Gen4 separate from older NB10000 units and preserves exact Anker model numbers. A source page or translation does not establish a current stock or shipment promise.

US Gen4 package selection

Use current model-specific instructions

Check the manufacturer recall route and the actual model and serial before buying or continuing to use a pack. This catalogue is not a safety clearance, and a stored-energy figure is not a carrier approval. Follow the current manufacturer and carrier instructions for your actual device and journey rather than relying on a general flight-friendly marketing label.

Manufacturer model and recall checks

Common questions

Is advertised capacity the same as delivered USB energy?

No. Voltage basis, conversion and load conditions matter; preserve the separate manufacturer values.

Has CompareFoundry performed charging or safety tests?

No. The catalogue records source-qualified claims and unresolved evidence.

Sources & further reading

  • A1695 US package and power-sharing notesChecked 2026-10-11

    The US Space Black power-bank selection and simultaneous-output conditions were read; separate charger bundles are excluded.

  • A1695 support specificationChecked 2026-10-11

    Model support supplies the 90 Wh rating and net weight. Power profiles do not establish compatibility with every device.

  • A1289 PowerCore 24K US specificationsChecked 2026-10-11

    Exact black US model and port/input specifications read. The retrieved source did not establish a watt-hour rating or complete cable packing list.

  • A1340 Prime 27K US specificationsChecked 2026-10-11

    The retained US listing says sold out. Used for exact identity and specifications, not a current stock promise. Dual-input peak has an explicit battery-level condition.

  • 35524 Nexode 20000mAh 130W US modelChecked 2026-10-11

    SKU 35524 is the separate-cable model, not the later built-in-cable product with a similar title. No checkout or complete three-port sharing test.

  • NB10000 Gen4 manufacturer specificationChecked 2026-10-11

    Gen4 specifies 39 Wh, per-port 22.5 W and shared 15 W. The 143 g figure excludes accessories and has a stated tolerance. Gen3 is not substituted.

  • NB10000 Gen4 US seller selectionChecked 2026-10-11

    US seller entry identifies Gen4 and its standard cable arrangement. This is not a stock, shipment or checkout verification.

  • US product recall entry pointChecked 2026-10-11

    Retained as a pre-purchase model/serial checking route. Absence from a listed campaign is not a safety clearance or an exhaustive recall search.

See our methodology for source labels and limitations. Product evidence dates are shown beside the corresponding specifications.

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