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Black rectangular power bank with rounded edges

RONEGN GN4 40000mAh power bank

SKU CH-D3XP-B01N0 MPN GN4

A 40000mAh portable charger delivering 22.5W USB-C and 20W iOS fast charging with three outputs and two inputs in a 5.0 x 3.0 x 1.0 in black case

  • Total capacity40,000 mAh
  • Measurements5.0 in × 3.0 in × 1.0 in
  • Product type40,000 mAh
  • Product colorBlack
  • Charges iPhone 15 to 60 % in 30 minutes with 22.5 W output
  • 40000 mAh capacity keeps devices running through camping or power cuts
  • Three output ports power phone, tablet and watch together
  • Two input choices — USB-C or Micro-USB — suit any cable
  • Compact 5.0 × 3.0 × 1.0 in size fits in a bag pocket

What the power bank does

The RONEGN GN4 is a 40000mAh portable charger built for travellers, campers and anyone who needs days of backup power away from a wall socket. It charges phones, tablets, smartwatches and other USB devices through three output ports. Buyers who need airline-compliant capacity cannot take this unit on a plane.

Charging speed and protocols

The power bank delivers up to 22.5W output via USB-C with PD4.0 and QC4.0 support and accepts 20W input for fast recharging. An iPhone 15 can reach 60 percent charge in 30 minutes, roughly three times quicker than standard chargers.

Heat, noise and power draw

The unit operates silently with no moving parts and stays cool during normal multi-device charging. It draws up to 20W from a compatible wall adapter when replenishing its own 40000mAh cell.

How it compares

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

Price $32.99
Cheaper than about 63% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameRONEGN
Model nameGN4
Part numberGN1
Total capacity40,000 mAh
Product type40,000 mAh
Product colorBlack
Size & build
Measurements5.0 in × 3.0 in × 1.0 in

Questions about this item

How many phone charges does the 40000mAh capacity actually deliver?

The supplier states the power bank can charge an iPhone 15 from 0% to 60% in 30 minutes; with 40000mAh you can repeat that cycle multiple times before the pack itself needs recharging.

What does the 22.5W USB-C output mean for charging speed?

The USB-C port supports up to 22.5W output using PD4.0 and QC4.0 protocols, enabling the quoted 0-60% iPhone 15 charge in 30 minutes when a compatible cable is used.

Will the 5.0 x 3.0 x 1.0 in dimensions fit in a standard backpack pocket?

At 5.0 inches long, 3.0 inches wide and 1.0 inch thick the unit is roughly the size of a large smartphone, so it slides into most backpack organiser pockets or jacket pockets.

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