Description

Price:$159.99
(as of Aug 24, 2026 18:36:52 UTC – Details)

Product description

AC OUTPUT 110V/130W FAST CHARGING

KEEP CHARGED EVERYWHERE

SUPPORT PASS THROUGH CHARGING

MULTIPLE SAFETY PROTECTION

ACCESSORIES INCLUDED

MODEL COMPARISON

Capacity

27000mAh/99.9Wh

Capacity

60000mAh/222Wh

Capacity

80000mAh/296Wh

USB-C Input/Output

/ & 20W

USB-C Input/Output

/ & 20W

USB-C Input/Output

65W & 100W

AC Output

110V/130W

AC Output

110V/130W

AC Output

110V/130W

USB-A

QC3.0/18W x 2

USB-A

QC3.0/18W x 2

USB-A

QC3.0/18W x 2

Dimension(L*W*H)

6.5 x 5.98 x 1.57 inches

Dimension(L*W*H)

8.66 x 5.94 x 1.57 inches

Dimension(L*W*H)

8.7 x 6 x 2.2 inches

Why does the power bank charge fewer times than expected?

Some energy loss (typically 30 – 45%) is normal during power conversion because of battery and circuitry design. After conversion, a fully charged 40,000 mAh power bank provides about 22,000 to 28,000 mAh to your devices.

What devices can the 110V/130W portable power bank power?

The AC port delivers up to 130W — enough for MacBook Pro, Dell XPS, HP, Surface, CPAP, drone, projectors, printer camera and mini fridges etc. It will not run hair dryers, microwaves, kettles, or space heaters.

Can charge the portable AC outlet power bank while supplying power at the same time?

Yes,pass-through is supported — charge the NJF-K4 via DC or USB-C while it powers your devices at the same time.

What kind of portable solar panel can pair with the Volessence NJF-K4?

The DC5521 input specification of NJF-K4 is: DC 19V/4.3A (Max 82W). Recommended VOC of solar panel: 18~22V built-in MPPT outputting DC 19V or USB-C (Max 100W) panel.

How should I store and maintain the product?

1.Charge the portable power station to activate the battery pack before using for the first time.

2.Store it between -20 and 45°C (-4 to 113°F).

3.Recharging it fully every 3 month.

🔌【130W AC Outlet for Most Laptops】 Ditch multiple adapters. This portable power bank delivers up to 130W via the AC outlet, ideal for charging most laptops under 130W like MacBook Pro, Dell XPS, and HP Surface. Also powers drones, cameras, and small appliances—perfect for remote work
⚡【100W PD Fast Recharge & Pass-Through】 Time is money. Recharge the 40000mAh power station to full in just 2.5-3 hours via the DC input or USB-C input. With pass-through charging, you can charge the power bank and your devices simultaneously—ideal for overnight stays
🔋【Massive 40000mAh Capacity】 Never run out of juice. Equipped with a high-density 148Wh lithium polymer battery, it charges a MacBook Pro 16″ up to 1 time, an iPhone 14 Pro Max 6-7 times, or a DJI Mini drone 5-6 times. Reliable backup for multi-day trips
✈️【Compact & TSA-Friendly Design】 Measures 6.5 * 6.0 * 2.2 inches & weighs 3.09 lbs. Meets TSA rules (148Wh), but please verify with your airline before flying. Perfect for camping and overlanding
🛡️【Comprehensive Safety & Support】 Built-in BMS offers 6-layer protection (overcharge, overheat, short-circuit & more). Includes 12-month warranty, full accessory kit, and 24/7 customer service

power banks for laptops

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