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Anker Prime Power Bank 27,650mAh (250W)

Use DeviceOK to compare documented power-bank energy/output with a device's energy and wattage needs while leaving PD negotiation, safety and battery health to Anker's hardware and support.

2 verified model facts5 relevant live tests0 exact compatibility answers0 model-specific fixesReviewed 2026-08-11

Model facts that change the troubleshooting path

01

Anker lists a total capacity of 27,650mAh for model A1340.

02

Anker specifies two USB-C ports, one USB-A port and up to 250W total output for this model.

Documented connection paths2 × USB-C · 1 × USB-A · charging-base pogo interface where supported

Test matrix

What to test and what a pass actually tells you

Run the test closest to the symptom. A passing result narrows the diagnosis; it does not certify the entire device.

Power Bank Charge Count CalculatorEstimate how many full-equivalent device charges a power bank can provide from entered Wh values and conversion efficiency.

Use the result to narrow the next branch; browser visibility is intentionally limited to the subsystem exposed by the current API.

Charger Wattage MatchCompare a device's entered power requirement with a charger's rated wattage while keeping USB-PD/PPS and voltage-profile limits explicit.

Use the result to narrow the next branch; browser visibility is intentionally limited to the subsystem exposed by the current API.

USB Voltage Current to Watts CalculatorCalculate watts from an entered USB or charger voltage/current profile.

Use the result to narrow the next branch; browser visibility is intentionally limited to the subsystem exposed by the current API.

Battery Runtime CalculatorEstimate runtime from battery watt-hours, average load and conversion efficiency.

Use the result to narrow the next branch; browser visibility is intentionally limited to the subsystem exposed by the current API.

USB-C Cable Power Rating CheckCompare an entered cable wattage rating with the power you want to carry, while keeping protocol/e-marker limits explicit.

Use the result to narrow the next branch; browser visibility is intentionally limited to the subsystem exposed by the current API.

Diagnostic focus

Problems worth separating on this model

01 · Power bank charges one device but not anotherReproduce this symptom independently, then choose the closest live test or exact compatibility record before changing drivers, firmware, cables or hardware.

02 · Entered wattage requirement vs output ratingReproduce this symptom independently, then choose the closest live test or exact compatibility record before changing drivers, firmware, cables or hardware.

03 · Full-equivalent charge estimateReproduce this symptom independently, then choose the closest live test or exact compatibility record before changing drivers, firmware, cables or hardware.

04 · Cable vs charger/power-bank pathReproduce this symptom independently, then choose the closest live test or exact compatibility record before changing drivers, firmware, cables or hardware.

05 · Protocol or battery-health issue requiring Anker supportReproduce this symptom independently, then choose the closest live test or exact compatibility record before changing drivers, firmware, cables or hardware.

Evidence handoff

If the browser cannot reach the suspected subsystem

Keep the browser result as one observation, then move to the operating system or manufacturer diagnostic that can see the protected hardware state. Do not interpret an unsupported browser API as a failed component.

For model-specific firmware, drivers or service diagnostics, use the official Anker source linked on this page.