Introduction

With MagSafe magnetic adoption on the rise, magnetic wireless power banks are becoming a must-have for iPhone users who value the convenience of instant, adhesive charging.

ChargerLAB recently secured a new, ultra-thin magnetic wireless power bank from WiWU.

Wrapped in a vibrant, unibody orange metal shell, this power bank packs 20W wired and 15W wireless fast-charging power. Inside, it houses a 5000mAh ATL lithium-polymer cell, perfectly sized for everyday mobile charging.

Having previously reviewed this WiWU model, we are now opening it up. Join ChargerLAB for a complete teardown as we reveal the internal engineering and materials powering this device.

Product Appearance

Teardown of the WiWU Silver Seraph Alloy Unibody Power Bank-Chargerlab

Sporting a crisp white-and-orange aesthetic, the box is anchored by the WiWU logo and product name at the top. A central image provides a clear view of the product, while the bottom highlights essential specs: 5000mAh capacity, PD 20W and 15W wireless charging, and full compliance for air travel.

The side of the box is equipped with an anti-counterfeit QR code and features the brand's philosophy slogan.

The other side of the box displays the brand's philosophy slogan.

The back of the box features a conceptual illustration showing the power bank in use, highlighting its slim and portable design, followed by detailed technical specs at the bottom.

Opening the box reveals the WiWU power bank and the product user manual.

The power bank sports a striking, bright orange aluminum body. It features a refined dual-texture aesthetic on the front, combining a diagonal woven pattern on the top half with a smooth, matte metallic finish on the bottom, delivering a premium look and feel.

The power bank features smooth, rounded edges throughout.

When viewed from different angles, the surface interacts with light to reveal distinct visual textures.

The WiWU logo is printed at the bottom of the front.

The back of it is dedicated to magnetic wireless charging, highlighted by a visible magnetic ring that indicates where the internal alignment magnets are located.

The brand’s slogan is printed around the outer edge of the magnetic charging coil on the back.

The silkscreened parameter info on the bottom of the rear matches the specs printed on the back of the box:

Product Name: Power Bank, Model: Wi-P088

Battery Type: Lithium-polymer battery

Battery Capacity: 5000mAh 3.75V 18.75Wh

Rated Capacity: 2600mAh (5V 2.4A)

Total Output: 20W (Max)

USB-C Input: 5V 3A / 9V 2A

USB-C Output: 5V 2.4A / 9V 2.22A / 12V 1.67A 20W (Max)

Wireless Charging Output: 5W / 7.5W / 10W / 15W

This product has received Chinese 3C, FCC, and CE certifications.

Arranged along the bottom of it are four LED battery indicators, a bi-directional USB-C fast-charging port, and a power button.

Pressing the power button illuminates the four soft white LED indicators, allowing users to monitor the remaining power level at any time.

The length of the power bank is about 103.15mm (4.061 inches).

The width of the power bank is about 64.47mm (2.538 inches).

The thickness of the power bank is about 10.55mm (0.415 inches).

That's how big it is in the hand.

ChargerLAB POWER-Z KM003C shows that the USB-C port supports QC3.0, FCP, SCP, AFC, SFCP, PD3.0, DCP, Samsung 5V2A and Apple 2.4A.

And it also supports three fixed PDOs of 5V 3A, 9V 2.22A and 12V 1.67A, and features two PPS subsets: 5.00-5.90V 3A and 5.00-11.00V 2A.

Attaching it to the back of an iPhone 17 Pro for testing reveals that the orange casing offers a visually complementary look against the iPhone's back panel.

The power bank's USB-C port is perfectly aligned with the center line of the phone's USB-C port.

The magnetic hold proved strong enough to easily lift the phone when holding only the power bank, showcasing a secure connection.

Upon attachment, the MagSafe charging animation triggers instantly on the phone screen, while the integration of the MagSafe battery status display confirms that the feature has been successfully unlocked.

When charging the iPhone via the USB-C port, measured output power reaches 12.06V 1.60A 19.31W, successfully establishing a PD fast-charging handshake.

After a quick overview of the design and protocol support, let's dive into the actual product teardown.

Teardown

Prying along the edge to release the snap-fit panel, which exposes the wireless charging coil and PCBA upon removal.

After extracting all internal components, we can see the complete assembly, which includes the aluminum alloy housing, the battery cell, the wireless charging coil, the PCBA, and the magnetic ring.

The magnetic ring is composed of several small, arc-shaped magnets, which together provide robust magnetic attraction.

Removing the battery cell reveals an integrated NTC thermistor inside, which is used for monitoring battery temperature.

The PCBA is securely fastened to the front panel using Phillips screws on both sides.

The internal battery cell is a lithium-ion polymer unit, which is from ATL, spec 676076, voltage of 3.75V, and a capacity of 5Ah (18.75Wh).

The battery cell tabs are protected with barley paper to provide electrical insulation.

The battery cell is secured to the inner wall of the aluminum alloy housing using white potting compound.

The PCBA and the wireless charging coil were carefully removed as a complete assembly.

The wireless charging transmitter coil is wound using Litz wire, with a ferrite sheet attached to the rear for magnetic shielding.

The front of the PCBA features the USB-C female port, an alloy choke, solid filtering caps, the power bank SoC, and the VBUS MOSFET.

The back of the PCBA features the wireless charging master control chip and the wireless charging power chip.

A SMD alloy buck-boost choke, 2.2μH.

The power bank master control chip is from iSmartWare, model SW6224S, housed in a QFN40 package. It supports various battery voltages, including 4.2V, 4.35V, 4.4V, and 4.5V, and achieves a peak conversion efficiency of up to 96%.

The chip goes beyond protocol versatility by integrating a 12-bit ADC and fuel gauge, with native support for 188-segment displays and 3–5 LED indicators. It also includes dedicated drivers for fast-charging status and LED lighting. To ensure device safety, it features a robust suite of protections against input over-voltage, output over-current, short circuits, charging timeouts, and overheating.

A MOSFET, marked 8025A.

The solid filtering cap, 16V 100μF.

A VBUS MOSFET, marked 8205A.

The wireless charging master control chip is from EESON, model ES8F8009C, in a QFN32 package.

The device integrates the iSmartWare SW5001, a highly integrated power chip designed for wireless charging transmitters. It features an efficient full-bridge converter and lossless current sensing, while supporting a wide array of fast-charging protocols including PPS, PD, FCP, SCP, and AFC.

Furthermore, it incorporates voltage and current ASK decoding circuits, Q-value detection, an internal PWM generator, and FSK modulation circuitry. The chip supports up to a 12V input with a 16V voltage tolerance and is capable of delivering up to 15W of output power.

The SW5001 simplifies circuit design by integrating a 5V 50mA supply for the wireless charging MCU, removing the need for external power components.

For reliability, it includes robust protections against input over/under-voltage, output short-circuits, and thermal issues. It also supports I2C communication for status reporting and allows input voltage settings of 5V, 9V, or 12V via divider resistors to accommodate different power levels.

Multiple MLCC caps are employed to facilitate wireless charging resonance.

A MOSFET, marked G3010, which is utilized for switching the wireless charging resonant caps.

Two lithium battery protection chips are from XySemi, model XB4908GJ, housed in ESN4 packages. They feature integrated battery protection MOSFETs to safeguard the cells against overcharging, over-discharging, and overcurrent conditions.

An NTC thermistor is incorporated to monitor the battery cell's operating temperature in real-time, ensuring operational safety.

Well, those are all components of the WiWU Silver Seraph Alloy Unibody Power Bank.

Summary of ChargerLAB

WiWU's magnetic wireless power bank blends portability with a refined aesthetic, showcasing a unibody orange aluminum alloy shell with textured detailing. Inside, it packs a 5,000mAh battery, supports 20W USB-C PD wired fast charging, and enables 15W magnetic wireless charging.

Our teardown confirms premium component selection: ATL battery cells, iSmartWare power management and wireless charging controllers, and a wireless charging MCU from EESON. The unit includes robust safety features like XySemi protection chips and an NTC thermistor, while extensive use of thermal conductive adhesive ensures high-quality thermal management and superior overall build integrity.