Have you ever plugged a smartphone into a multi-port USB charger, only to watch your USB-powered monitor go dark for a moment? Buffalo is addressing exactly that annoyance with 3 new USB chargers, the BSACPD10005C4BK, BSACPD14005C4BK, and BSACPD24005C4BK, launching in early July. All 3 models charge up to 4 devices at once and feature the automatic power distribution function PWRArrange. Pricing is open, with pre-orders already available on Amazon starting at 6,480 yen.
A Fix for "My Monitor Went Dark When I Plugged In My Phone"
Most multi-port chargers reallocate power across all ports every time a device is plugged in or removed, briefly cutting power to the devices already connected. You will rarely notice this while charging a smartphone, but it is a different story with a docking station or a USB-powered monitor: plugging in a single phone can blank your screen or disconnect peripherals, which gets old fast.
The momentary power-cut suppression feature shared by all 3 new models is designed to prevent exactly this. According to Buffalo, even with an external monitor connected through a docking station, plugging or unplugging other devices will not interrupt the power supply. The company does note that the feature may not work correctly depending on the device's specifications and how it is connected. It is the kind of improvement that never shows up in a spec sheet headline, but for anyone trying to consolidate their desk's power supply into a single charger, it is a genuinely practical one.
PWRArrange Handles Power Allocation for You
The other shared feature is the automatic power distribution function PWRArrange. When only 1 device is connected, it assigns the maximum output to that port; when multiple devices are connected, it automatically adjusts the output to each port. This helps avoid a classic multi-port charger problem: picking the wrong port combination and ending up with a laptop that barely charges. Note that PWRArrange only works on the USB Type-C ports, and it is disabled when the Type-A port is used in combination.
On the safety side, continuous output at high power levels such as 100W or 140W is limited to around 30 minutes, with thermal control reducing output when high power draw persists. The warranty period is 2 years. No cable is included, so charging at maximum output requires a separately purchased USB Type-C cable with an e-marker.
3 Models: 100W, 140W, and 240W
The main differences between the 3 models are total output and port configuration.
| Model | Ports | Total Output | Max per Port | Amazon Price |
|---|---|---|---|---|
| BSACPD10005C4BK | USB Type-C x3, Type-A x1 | 100W | 100W | 6,480 yen |
| BSACPD14005C4BK | USB Type-C x4 | 140W | 140W | 11,980 yen |
| BSACPD24005C4BK | USB Type-C x4 | 240W | 140W | 17,980 yen |
The entry-level BSACPD10005C4BK offers 4 ports (Type-C x3 plus Type-A x1) with a total output of 100W. A single port can deliver up to 100W, enough to charge power-hungry laptops in the MacBook Pro (14-inch) class. It is a wall-plug type with a folding plug, and the body measures roughly 32 x 60 x 62mm (excluding the AC plug) at about 185g, a portable size despite packing 4 ports.
The mid-range BSACPD14005C4BK has 4 Type-C ports and supports up to 140W on a single port. That means it can fast-charge a 140W-class laptop like the MacBook Pro (16-inch) at full speed while charging a smartphone and earbuds on the remaining ports. It is also a wall-plug type with a folding plug, measuring roughly 33 x 79 x 73mm (excluding the AC plug) at about 310g.
The top-end BSACPD24005C4BK is a desktop type with a total output of 240W, and it comes with a stand and an AC cable about 1.5m long. Maximum output per port is 140W, giving it enough headroom to power 4 devices including 2 laptops at the same time. The body measures roughly 35 x 122 x 88mm (excluding the AC cable and stand) at about 550g, a size clearly intended to stay on your desk.
Summary
From the wall-plug 100W and 140W models to the desktop 240W model, the lineup covers a wide range of use cases. The 2 shared features, momentary power-cut suppression and PWRArrange, both target the everyday frustrations that multi-port charger users know well. Personally, the 240W model is the most tempting, since it could consolidate the power for a monitor and docking station into a single unit. The chargers go on sale in early July, and pre-orders are open on Amazon.
