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Black rectangular power bank with four USB ports on one end

JUOVI J2931 20000mAh 65W power bank

SKU CH-N1X6-82H34 MPN J2931

A 20000mAh lithium-polymer power bank with two USB-C ports delivering 65W PD 3.0 and two USB-A ports at 30W for charging four devices simultaneously

  • 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 40 minutes with 65W PD 3.0
  • 20000mAh capacity powers laptop, tablet, phone and earbuds simultaneously
  • Four ports — two USB-C at 65W and two USB-A at 30W — charge four devices at once
  • Double-press activates low-current trickle mode for safe charging of AirPods and smartwatches
  • Weighs 400 grams and measures 5.39 in x 2.76 in x 1.04 in for travel-friendly portability

65W 20000mAh Power Bank for Laptops

This JUOVI J2931 power bank delivers 65W PD 3.0 charging through two USB-C ports and 30W through two USB-A ports. A 20000mAh lithium-polymer cell provides extended power for travel or remote work. Four devices can be charged at the same time from a single compact unit.

Suits multi-device users needing laptop power

Professionals and students carrying a USB-C laptop, phone, tablet and earbuds can charge all four simultaneously. The low-current trickle mode protects small wearables. Buyers who need more than 65W output or a higher capacity than 20000mAh should look at a larger unit.

65W PD 3.0 via dual USB-C ports

The single specification that decides fit is the 65W Power Delivery 3.0 limit on the two USB-C ports. If your laptop requires more than 65W to charge while in use, this bank will not sustain full performance.

How it compares

Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 78% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameJUOVI
Model nameJ2931
Part numberJ2931
Total capacity20,000 mAh
Product type20,000 mAh
Product colorBlack
Power
Battery chemistryLithium polymer
Voltage5 V
Amperage3 A
Size & build
Measurements5.39 in × 2.76 in × 1.04 in
Product weight400 g

Questions about this item

Should I pick the 65 W, 90 W, 45 W or 35 W version of the 20000 mAh JUOVI power bank?

The J2931 is the 65 W model; the other listings are separate products with different output ratings, so choose the 65 W unit if that matches your laptop or device needs.

What does the 65 W rating actually deliver when charging a laptop?

It can bring a 14-inch MacBook Pro to roughly 50 % in about 40 minutes and an iPhone to around 60 % in 30 minutes via the USB-C PD 3.0 ports.

Which charging standard do the USB-C ports use and what does it limit?

Both USB-C ports support PD 3.0 up to 65 W; the two USB-A ports are capped at 30 W, so total simultaneous output is shared across all four ports.

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