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Black rectangular power bank with rounded edges, slim profile, USB-C port visible

MIRO

MIRO B1 Power Bank 4400mAh 22.5W Wired 15W Wireless Black

SKU CH-FHPS-0JF5D

Palm-sized 4400mAh power bank with 22.5W wired and 15W wireless fast charging

  • Total capacity4,400 mAh
  • Compatible phone brandsApple
  • Compatible phone modelsiPhone 14 Pro Max
  • Battery chemistryLithium Polymer
  • Voltage5 V
  • Amperage3A
  • Palm‑sized design fits any pocket with 4400 mAh capacity
  • 5 W wired output charges phones to 30‑50 % in 30 minutes
  • 15 W wireless charging powers compatible devices without cables
  • Single USB‑C port handles both input and output for one‑cable simplicity
  • Weighs only 110 g for ultra‑light everyday carry

Palm-Sized Power Bank

The MIRO B1 is a 4400mAh portable charger designed for anyone who needs a lightweight backup that fits in a trouser pocket. It supports both wired and wireless charging for smartphones and small accessories. The single USB-C port handles both input and output, so only one cable is required. It is not suited for users who need multiple full phone charges or simultaneous multi-device power.

Thermal Behaviour and Power Draw

The polymer cell operates at 5V and 3A, delivering up to 22.5W wired and 15W wireless without audible fans or bulky heatsinks. In normal use the slim 0.37in profile stays comfortable to hold while topping up a handset. The intelligent safety chip manages temperature and protects against over-current during routine charging sessions.

Sustained Load Performance

Wired output can bring a compatible phone from empty to roughly 30-50% in about 30 minutes, maintaining the 22.5W rate until the bank’s own reserve drops. Wireless charging holds a steady 15W for the duration of a typical top-up. The 110g unit delivers one full cycle for most flagship handsets before requiring a recharge itself.

How it compares

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

Price $26.99
Cheaper than about 80% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameMIRO
Product lineB1
Model nameB1
Part numberB1
Total capacity4,400 mAh
Product typePower Bank
Product colorBlack
Power
Battery chemistryLithium Polymer
Voltage5 V
Amperage3A
Size & build
Measurements4.15 × 2.82 × 0.37‘’
Product weight110g
Compatibility
Compatible phone brandsApple
Compatible phone modelsiPhone 14 Pro Max

Questions about this item

How do I start wireless charging with the 15W pad on the MIRO B1?

Place a Qi-compatible device centred on the top surface; charging begins automatically when the internal coil aligns, no button press required.

What upkeep does the sealed 4400mAh lithium-polymer cell need over time?

Recharge the unit to roughly half capacity every few months if stored, and keep it away from extreme heat to preserve cycle life.

At what point does the 22.5W wired output throttle during continuous use?

The intelligent safety chip reduces power once internal temperature reaches its protection threshold, so sustained output drops until the unit cools.

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