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Pearl white rectangular power bank with rounded edges and magnetic surface

Eissix W21 10000mAh MagSafe Power Bank Pearl White

SKU CH-T97P-W9GXJ

A 10000mAh MagSafe power bank with N52 magnets for secure wireless charging of iPhone 12 to 17 series and Apple Watch, plus 22.5W USB-C output

  • ColorPearl White
  • Dimension0.67 in x 2.76 in x 4.2 in
  • Secure wireless charging with 3500GS N52 magnetic hold
  • 5W USB-C fast charging keeps devices powered quickly
  • Pocket-sized at 1.7 × 7 × 10.7 cm and 195g
  • Built-in NTC heat protection limits surface to 40°C
  • Works with iPhone 12 through 17 and Apple Watch

Magnetic Wireless Power Bank

The Eissix W21 is a 10000mAh MagSafe-compatible power bank designed for iPhone 12 through 17 series and Apple Watch Ultra 1, 2 and 3. Eighteen N52 magnets deliver up to 3500GS of holding force so the charger stays firmly attached during calls, gaming or selfies. It works with MagSafe cases or bare phones and also supports AirPods and iWatch magnetic attachment.

Thermals and Power Delivery

An NTC heat protection circuit regulates the charging surface to stay below 104°F (40°C) while the 5A-rated lithium-ion cells handle energy transfer. The USB-C port provides up to 22.5W wired output and the wireless pad charges at MagSafe speeds. Some warmth during charge or discharge is normal and managed by the built-in temperature control.

Build Integration

Measuring 0.67 in x 2.76 in x 4.2 in and weighing 195g (6.9 oz), the unit fits in a pocket without covering the phone camera or buttons. It is intended for users who want cable-free magnetic charging on a single device. Buyers needing simultaneous multi-device wired charging or higher capacity for extended off-grid use should consider other options.

Highlights

  • Secure wireless charging with 3500GS N52 magnetic hold
  • 5W USB-C fast charging keeps devices powered quickly
  • Pocket-sized at 1.7 × 7 × 10.7 cm and 195g
  • Built-in NTC heat protection limits surface to 40°C
  • Works with iPhone 12 through 17 and Apple Watch

Specifications

BrandEissix
ModelW21
ColorPearl White
Dimension0.67 in x 2.76 in x 4.2 in

Questions about this item

How do I attach the W21 power bank to my iPhone, and what is the mistake that stops it from charging?

Snap the W21 onto the back of a compatible iPhone 12 through 17 series or a MagSafe case; the 18 N52 magnets provide 3500GS hold. The common error is leaving a non-magnetic case on, which blocks the magnetic field and prevents wireless charging from starting.

What part of the W21 will degrade first and need replacement?

The internal lithium-ion cells are rated for about 500 full charge cycles before capacity drops noticeably. The N52 magnets and USB-C port are solid-state and do not wear out, so the battery cells are the only component that will eventually require replacing the whole unit.

What limits the W21 during a long charging session?

The NTC thermal protection caps the charging surface at 104°F (40°C). Once that temperature is reached, the power bank throttles wireless output below the 22.5W USB-C maximum to protect the cells, so sustained high-speed charging is limited by heat rather than capacity.

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