Portable Power bank with Built-in Cable

How many times can Portable Power Supply charge my phone?

Roughly: a 10,000 mAh bank gives about 2–3 phone charges; 20,000 mAh about 4–5. Actual results vary by phone battery size, cable, and usage.

Why does phone charging run slowly when using a portable power supply?

Possible reasons: low-power port, older cable, very low phone battery entering trickle mode, or the phone lacks higher-speed support. Try a fast-charge USB-C port and a rated cable.

Can I charge a power bank while using it to charge devices?

Most support pass-through charging, but it generates heat and slows both processes. Avoid continuous pass-through for >5 hours to prevent battery stress. For heavy usage, choose models with heat-dissipation fins.

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