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Rectangular black power bank with rounded edges, four ports on one side

JUOVI J2931 power bank 20000mAh 65W

SKU CH-Z8PB-S2ZTJ MPN J2931

A 20000mAh portable charger with 65W USB-C PD 3.0 output, four ports and a low-current mode for small devices

  • Type20000 milliamp_hours
  • ColorBlack
  • Capacity20000 milliamp_hours
  • Chemicallithium_polymer
  • Volt5 volts
  • Amp3 amps
  • Charges a 14 MacBook Pro to 50% in around 40 minutes with 65W PD 3.0
  • Powers iPhone to 60% in 30 minutes via high-speed USB-C delivery
  • 20000mAh capacity runs laptop, tablet, phone and earbuds together on long trips
  • Four ports — two USB-C 65W and two USB-A 30W — charge four devices at once
  • Double-press activates low-current trickle mode for safe charging of AirPods and smartwatches

20000mAh portable power for laptops and phones

The JUOVI J2931 is a 20000mAh lithium-polymer power bank that delivers up to 65W through two USB-C ports. It can charge a compatible laptop, tablet and phone during travel or remote work. The 400g black unit measures 5.39 x 2.76 x 1.04 inches.

Who this suits and who should look elsewhere

Professionals and students needing one charger for a laptop and smaller devices will find the four-port layout useful. Users who only need phone top-ups may prefer a lighter, lower-capacity model. Buyers whose laptop requires more than 65W should consider a higher-output charger.

The 65W USB-C output decides compatibility

The single specification that determines fit is the 65W Power Delivery 3.0 rating on the USB-C ports. If your laptop accepts 65W or less over USB-C, this bank can fast-charge it; if the laptop needs a higher wattage, charging will be slower or unsupported.

Highlights

  • Charges a 14 MacBook Pro to 50% in around 40 minutes with 65W PD 3.0
  • Powers iPhone to 60% in 30 minutes via high-speed USB-C delivery
  • 20000mAh capacity runs laptop, tablet, phone and earbuds together on long trips
  • Four ports — two USB-C 65W and two USB-A 30W — charge four devices at once
  • Double-press activates low-current trickle mode for safe charging of AirPods and smartwatches

Specifications

BrandJUOVI
ModelJ2931
Type20000 milliamp_hours
ColorBlack
Part NumberJ2931
Capacity20000 milliamp_hours
Chemicallithium_polymer
Volt5 volts
Amp3 amps
Dimension5.39 in x 2.76 in x 1.04 in
Weight400 grams

Questions about this item

Will the J2931 power bank charge my older laptop that only has a USB-A port?

The unit provides two USB-A ports rated at 30W each, so an older laptop can be powered if it accepts USB-A charging within that limit.

How can I verify the 65W output is active on the USB-C ports after I connect my MacBook?

When a compatible laptop negotiates PD 3.0 the power bank delivers up to 65W; the MacBook charging indicator will show fast-charge status once the handshake completes.

Does the J2931 box include a USB-C cable for the 65W ports, or do I need to buy one separately?

A USB-C to USB-C cable is included in the package so the 65W ports can be used straight away.

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