JUOVI J2931 power bank 20000mAh 65W
A 20000mAh portable charger with 65W USB-C PD 3.0 output, four ports and a low-current mode for small devices
- Total capacity20,000 mAh
- Battery chemistryLithium polymer
- Voltage5 V
- Amperage3 A
- Measurements5.39 in × 2.76 in × 1.04 in
- Product type20,000 mAh
- 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.
How it compares
Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.
- Price $47.99
- Pricier than about 73% of the 1,307 comparable items (median $36.99).
Specifications
| Product | |
|---|---|
| Brand name | JUOVI |
| Model name | J2931 |
| Part number | J2931 |
| Total capacity | 20,000 mAh |
| Product type | 20,000 mAh |
| Product color | Black |
| Power | |
| Battery chemistry | Lithium polymer |
| Voltage | 5 V |
| Amperage | 3 A |
| Size & build | |
| Measurements | 5.39 in × 2.76 in × 1.04 in |
| Product weight | 400 g |
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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