MIRO B4 5000mAh 15W Magnetic Wireless Power Bank Black
A 5000 mAh magnetic wireless power bank delivering 15 W fast charge in a slim 110 g card-style design
- Total capacity5,000 mAh
- Compatible phone brandsApple
- Compatible phone modelsiPhone 14 Pro Max
- Battery chemistryLithium Polymer
- Voltage5 V
- Amperage3A
- 5000mAh capacity gives a full phone charge
- 15W wireless output charges at speed
- Strong magnetic module aligns automatically with iPhone 14 Pro Max
- Card-style body measures 4.17×2.6×.472 inches
- Weighs 110g for pocket-friendly portability
Magnetic Power Bank for iPhone
The MIRO B4 is a 5000mAh magnetic wireless power bank built for Apple iPhone 14 Pro Max users. Its card-style body measures 4.17×2.6×0.472 inches and weighs 110g. A lithium-polymer cell stores 19.25Wh and delivers up to 15W of wireless power at 5V 3A. The integrated magnet array locks onto the back of the phone for cable-free charging.
Who this suits and who it does not
This unit suits iPhone owners who want a slim, snap-on battery for daily top-ups while streaming or taking calls. Buyers who need more stored energy for multiple full charges or who use Android handsets without magnetic alignment should look at larger-capacity or non-magnetic alternatives.
The deciding specification
The single figure that decides fit is the 15W wireless output combined with the magnetic module designed for Apple MagSafe alignment. If your charging routine relies on that exact power level and magnetic attachment, the B4 matches the requirement; otherwise a different power profile will serve you better.
How it compares
Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.
- Price $29.99
- Cheaper than about 70% of the 1,307 comparable items (median $36.99).
Specifications
| Product | |
|---|---|
| Brand name | MIRO |
| Product line | B4 |
| Model name | B4 |
| Part number | B4 |
| Total capacity | 5,000 mAh |
| Product type | Power Bank |
| Product color | Black |
| Power | |
| Battery chemistry | Lithium Polymer |
| Voltage | 5 V |
| Amperage | 3A |
| Size & build | |
| Measurements | 4.17 × 2.6 × 0.472 in |
| Product weight | 110g |
| Compatibility | |
| Compatible phone brands | Apple |
| Compatible phone models | iPhone 14 Pro Max |
Questions about this item
Does the MIRO B4 5000mAh power bank get hot when charging an iPhone 14 Pro Max at 15W wireless all day?
The 5000mAh lithium-polymer cell delivers 15W wireless output; the slim 0.472-inch profile leaves little thermal mass, so extended high-power sessions will warm the casing.
What cable and wall charger do I need to recharge the MIRO B4 itself?
A USB-C cable and a 5V 3A USB-C power adapter are required to refill the 19.25Wh internal battery.
Will the magnetic alignment hold an iPhone 14 Pro Max securely in a vertical car mount while the B4 is attached?
The built-in magnetic module is designed for Apple MagSafe-compatible models such as the iPhone 14 Pro Max, providing a firm hold in portrait or landscape orientation.
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