Introduction

We recently got the all-new Baseus EnerFill FH22 100W Ultra-Mini GaN Charger. Thanks to its 3D stacked internal design, it’s roughly 65% smaller than typical 100W bricks, perfectly striking the balance between pocket-sized portability and heavyweight performance.

In aesthetic design, sporting a 'Practical yet Beautiful' look, the charger features a sleek matte shell and foldable prongs that feel great in the hand and slip easily into any bag.

In output performance, it supports a full 100W Max output and is fully compatible with PD, QC, PPS, and UFCS unified fast charging protocols, providing seamless power delivery for Apple, Android and ultrabook devices. Internally, the re-engineered architecture effectively ensures low-temperature fast charging and operational safety.

We previously reviewed the Baseus GaN6 Pro Mini 45W GaN Charger, which also proved to be a stellar performer for juicing up phones, tablets, and slim laptops.

Furthermore, we went ahead and did a full teardown of that 45W model as well.

Now, let’s dive into this new 100W ultra-mini fast charger to see what kind of build quality and hardware layout Baseus is packing inside.

Product Appearance

Teardown of Baseus EnerFill FH22 100W GaN PD Fast Charger-Chargerlab

The front of the box showcases the Baseus logo and a sleek render of the charger itself, highlighted by its main selling points.

The back of the packaging box displays the product application scenarios, along with a full spec sheet. We’ll dive deep into these detailed specs during our upcoming close-up inspection of the actual unit.

Unboxing the package reveals the Baseus charger main unit and a quick start guide.

The charger features a clean, all-white matte shell, with a subtle light gray Baseus logo on the side for a very sleek and minimalist look.

Featuring a squared-off design with rounded contours, integrated with foldable Chinese-standard prongs at the base. This configuration not only optimizes spatial efficiency but also mitigates the risk of scratching adjacent items during transit.

The output end utilizes a cool split design that mixes glossy and matte textures. It is equipped with a single USB-C port featuring Baseus's signature yellow plastic sheet inside, complemented by a lightning bolt fast-charging icon printed below.

The base where the prongs fold in also prints out the complete input/output spec.

Here is the official spec for the charger：

Model: E01243

Input: 200-240V~ 50/60Hz, 1.5A Max

Output Options: 5V3A, 9V3A, 12V3A, 15V3A, 20V=5A (100W Max)

The brick is fully Chinese 3C certified for safety and is manufactured by Shenzhen Baseus Technology Co., Ltd.

The foldable metal prongs feel incredibly solid, with nicely rounded chamfered edges that look and feel premium.

That's how big it is in the hand.

Put it with Apple’s 96W dynamic charger, it is remarkably smaller.

The length of the charger is about 48.22mm (1.898 inches).

The width of the charger is about 36.25mm (1.427 inches).

The thickness of the charger is about 36.32mm (1.430 inches).

The weight is about 107.7g (3.80 oz).

ChargerLAB POWER-Z KM003C shows that the USB-C port supports UFCS 2.0, QC3.0、AFC, PD3.2/PPS/AVS, QC5, DCP and Apple 2.4A.

And it also supports four fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A and 20V5A, and features PPS subset: 5-21V 5A, and AVS subset: 9-20V 3A/5A.

It supports two two PPS voltage subsets: 3.4–5.5V at 3A and 5.5–11V at 4A.

Now that we’ve wrapped up our quick look at the design and fast-charging compatibility, let's diving straight into the full internal teardown.

Teardown

Prying open the ultrasonically welded prong module along the shell seam reveals the internal PCBA, which is heavily packed and tightly sealed in gray thermal potting compound.

The prong end connects to the PCBA via lead wires to facilitate power delivery.

Removing the PCBA out of the shell gives us a much better look at the internal hardware, which is heavily buried in gray thermal potting compound and wrapped in massive layers of thermal copper foils.

The PCBA is a neat rectangular cuboid, with the gray thermal potting compound bleeding into every single gap between the components. It not only supercharges heat dissipation during high-power output but also makes the internal build incredibly shockproof and durable against drops.

Viewing from the opposite side reveals the architecture of the input end PCB.

The length of PCBA is about 37.21mm (1.465 inches).

The width of PCBA is about 31.50mm (1.240 inches).

The height of PCBA is about 31.84mm (1.254 inches).

After removing the surface grey thermal potting compound, the internal circuit architecture of the charger is clearly manifested.

The charger utilizes a highly spatial-efficient 3D stacking setup, consisting of a main bottom PCB and a lateral input end PCB.

Viewing at the back of the main PCBA, the overall hardware layout is packed incredibly tight

Featuring the back of the board is a full lineup of hardware：a USB-C port, a highly integrated GaN IC, a synchronous rectifier controller, a protocol chip and SMD Y-caps.

A side view gives us a clear look at the high-voltage filter caps and the high-frequency transformer neatly wrapped in yellow insulating tape.

The other side shows off a solid filter cap, a safety X2 cap, and other essential hardware.

The back of the input end PCB, you can see the printed SHELL LOGO right next to the model info and spec sheet details.

Separating the input end PCB from the main bottom PCB gives us a much better look at the exact silicon and hardware recipe used in each section.

Let’s start by diving into the input end PCB first.

The input end integrates a SMD fuse designated for OCP.

The safety X2 cap is from Kintin, 0.22μF.

The common-mode choke is wrapped in heat-shrink tubing for insulation, working to clear out high-frequency EMI noise.

The SMD thermistor is from TRX, model TNG03M5A. Boasting a strong ability to kill inrush current spikes within a space-saving, ultra-compact body that is fully ready for lead-free reflow soldering and auto pick-and-place assembly.

Here is the info about TRX SMD thermistor.

Featuring the back of the main PCB is a rectifier bridge, model RSBL8010.

An HKW9700 thermal switch from HKW, to provide OTP for the entire charger.

Moving on to the main bottom PCB, the primary side packs two high-voltage filter caps from Koshin, both 400V 47μF.

The transformer is insulated with yellow tape, printd TR-378E.

Two SMD Y-caps are from TRX, model TMY1471K. Featuring a low-profile and lightweight design, they are optimized for high-power-density power supplies such as GaN fast chargers.

Here is the info about TRX SMD Y-cap.

Two MLCC caps on the back of the PCBA, to power supply to the primary master control chip.

The integrated GaN IC is from DK Semiconductor, model DK8712BD. an AC-DC power management IC based on an asymmetric half-bridge (AHB) architecture that houses two internal GaN power FETs.

Encapsulated in a DFN 8x8 package, it strips down the external circuit recipe, making it the perfect weapon for high-efficiency, high-density power setups.

This chip supports a Max switching frequency of 800KHz with near-zero standby power draw. It enables primary ZVS and secondary ZCS soft-switching across a wide load span, cutting down switching losses and putting way less stress on components. Paired with a built-in full-range frequency dithering feature, it keeps system EMI noise well under control.

Packed with a bulletproof suite of protection features, the DK87XXBD is tailor-made for PD fast chargers, laptop/tablet bricks, two-wheeler e-bike chargers, and LED power supplies.

An Everlight EL1018 optocoupler is between the primary and secondary circuits.

The secondary synchronous rectifier controller is also from DK Semiconductor, model DK5V100R05VN. Encapsulated in a PDFN5x6 package, it features an ultra-low forward voltage drop and minimal thermal dissipation profiles.

The IC integrates an internal 100V NMOSFET, which drastically curtails conduction losses and significantly elevates overall system efficiency, serving as an ideal alternative to traditional Schottky diodes.

The DK5V100R05VN supports CCM, DCM, and QR modes, throwing in built-in self-powering and smart detection tech to completely dump external power supply lines or front-end sync signals, all while smoothing out system EMC noise.

This eco-friendly chip is fully RoHS compliant and halogen-free, making it the perfect fit for flyback PSR and SSR architectures. Thanks to its integration and rock-solid reliability, it is widely deployed in high-efficiency gear like USB chargers, power bricks, and LED drivers.

The iSMARTWARE SW2325P is a highly integrated fast charging protocol controller tailor-made for PD setups. Driven by a built-in 32-bit microprocessor, it fully supports PD 3.2, QC, UFCS, and other mainstream fast charging protocols, with plenty of room for proprietary custom flavors.

Supporting a wide voltage adjustment span from 3.3V to 22V, this chip packs a high-precision DAC and an optocoupler driver to slash the external component count, bumping up the system's all-in-one integration and rock-solid reliability.

In terms of safety, the SW2325P offers a bulletproof protection suite against covering OVP, UVP, OCP, OTP and SCP. Complemented by its QFN-20 package, it’s the perfect match for high-efficiency PD fast chargers.

A VBUS MOSFET is from YouCrystal, model YC65N03, a 30V-rated NMOS packing inside a PDFN3333 footprint.

An output filter cap is from BERYL, 25V 1000μF.

Well, those are all components of the Baseus EnerFill FH22 100W GaN PD Fast Charger.

Summary of ChargerLAB

A deep dive teardown of the Baseus EnerFill FH22 100W charger shows that it drops its footprint to the absolute minimum without sacrificing triple-digit wattage, tracking down a sweet spot between portability and performance compared to bulky traditional 100W setups.

The internal PCBA is packed with grey thermal potting compound, which squashes the heating bottleneck of a high-density, low-volume profile while ramping up the overall structural ruggedness and shockproofing.

Under the hood, the charger rocks a high-density multi-board 3D stacking recipe. Both the primary master control chip and secondary synchronous rectifier controller are from DK Semiconductor, using their all-in-one integration to strip away the external component count and crunch down the chassis space.

For the protocol chip, it adopts iSMARTWARE's SW2325P to drive bulletproof support for mainstream fast charging standards like PD 3.2 and UFCS. With filtering caps sourced from Koshin and BERYL, the overall hardware build is rock-solid, making it a stellar premium choice that rocks both portability and heavy-duty PD fast charging.