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Dark rectangular power bank with four built-in cables and multiple ports

YILANS JM4 Pro 50000mAh power bank

SKU CH-7GSX-EFJNV MPN JM4

A 50000 mAh lithium-polymer power bank with four built-in cables, a bidirectional USB-C port and two USB-A outputs delivers 22.5 W fast charging for up to six devices at once

  • Total capacity50,000 mAh
  • Compatible phone brandsiPhone 17, 17 Plus, 17 Pro, 17 Pro Max, iPhone 16, 16 Plus,
  • Compatible phone modelsiPhone 17, 17 Plus, 17 Pro, 17 Pro Max, iPhone 16, 16 Plus,
  • Battery chemistryLithium polymer
  • Voltage3.7 V
  • Measurements5.61 in × 2.88 in × 1.12 in
  • Built-in USB-C, iOS, Micro-USB and USB-A cables charge six devices at once
  • 50000 mAh capacity delivers over ten full charges for iPhone 17
  • 5 W fast charging with PD 3.0 and QC 4.0 reaches 65 % in 30 minutes
  • 61 in × 2.88 in × 1.12 in size fits in a bag at 1.11 lb
  • Lithium-polymer 3.7 V chemistry powers phones, tablets, earbuds and smartwatches

50000mAh portable charger for multi-device users

The YILANS JM4 Pro is a 50000mAh lithium-polymer power bank with built-in USB-C, iOS, Micro-USB and USB-A cables plus a bidirectional USB-C port and two USB-A outputs. It can power up to six devices at once, covering phones, tablets, earbuds and smartwatches without extra cords. The dark-coloured unit measures 5.61 in by 2.88 in by 1.12 in and weighs 1.11 lb.

Upgrade from lower-capacity banks when away

It replaces smaller power banks that need daily recharging and separate cables for each device. The jump is worth it for camping, road trips, power outages or group travel where ten or more phone charges are needed between wall outlets. Built-in cables remove the hassle of packing multiple leads.

Fits in a backpack or large pocket.

The pack needs an 18W or higher USB-C charger to refill in about seven hours. It supplies up to 22.5W with PD 3.0 and QC 4.0 detection, giving roughly 65% charge to a compatible phone in 30 minutes. Because its 50000mAh capacity exceeds the 27000mAh airline limit, it is not suited for carry-on luggage.

How it compares

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

Price $48.99
Pricier than about 75% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameYILANS
Model nameJM4 Pro
Part numberJM4 Pro
Total capacity50,000 mAh
Product type50,000 mAh
Product colorDark
Power
Battery chemistryLithium polymer
Voltage3.7 V
Size & build
Measurements5.61 in × 2.88 in × 1.12 in
Product weight1.11 lb (0.5 kg)
Compatibility
Compatible phone brandsiPhone 17, 17 Plus, 17 Pro, 17 Pro Max, iPhone 16, 16 Plus, 16 Pro, 16 Pro Max, iPhone 15, 15 Plus, 15 Pro, 15 Pro Max, iPhone 14, 14 Plus, 14 Pro, 14 Pro Max, iPhone13 Pro, iPhone 13 Pro Max, iPhone 13 mini, iPhone 13, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 12 mini, iPhone 12, iPhone 11 Pro, iPhone 11 Pro Max, iPhone 11, iPhone SE (2nd generation), iPhone XS, iPhone XS Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 Plus
Compatible phone modelsiPhone 17, 17 Plus, 17 Pro, 17 Pro Max, iPhone 16, 16 Plus, 16 Pro, 16 Pro Max, iPhone 15, 15 Plus, 15 Pro, 15 Pro Max, iPhone 14, 14 Plus, 14 Pro, 14 Pro Max, iPhone13 Pro, iPhone 13 Pro Max, iPhone 13 mini, iPhone 13, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 12 mini, iPhone 12, iPhone 11 Pro, iPhone 11 Pro Max, iPhone 11, iPhone SE (2nd generation), iPhone XS, iPhone XS Max, iPhone XR, iPhone X, iPhone 8, iPhone 8 Plus

Questions about this item

What are the exact dimensions of the YILANS JM4 Pro 50000mAh power bank?

It measures 5.61 in long, 2.88 in wide and 1.12 in thick, weighing 1.11 lb, so check your bag pocket or organiser against those figures before buying.

How do I recharge the power bank itself, and what mistake slows it down?

Plug a fast-charging cable into the bidirectional USB-C port and use an 18 W or higher wall charger; using a lower-wattage adapter stretches the refill to well over 7 hours.

When will the built-in cables need replacing?

The four integrated cables (USB-C, iOS, Micro-USB, USB-A) are not user-replaceable; if a connector frays or fails, the whole unit must be swapped out.

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