UGREEN 10000mAh Two-Way Fast Charging Power Bank

The UGREEN 10000mAh two-way fast charging power bank (model PB311, SKU 25742) is a slim, dual-port portable charger built for everyday carry. It delivers up to 20W via USB-C through PD3.0 and up to 22.5W via USB-A through QC3.0, allowing two devices to charge simultaneously from a single compact bank. Two-way fast charging means the USB-C port doubles as the input for self-recharging — a 20W PD adapter brings the bank from flat to full in approximately three hours. At just 16.5mm thick with a metallic casing and a digital LED percentage display, it balances genuine fast-charging capability with a form factor that fits in a shirt pocket or the side pouch of a laptop bag.

Where the PB311 Sits in the UGREEN Power Bank Range

The UGREEN power bank lineup covers capacities from 5,000mAh compact units up to 25,000mAh laptop-grade chargers. The PB311 occupies the practical midpoint: 10,000mAh provides enough capacity for approximately two full smartphone charges, sufficient for a full working day or a short trip, while the 131.8 × 66 × 16.5mm dimensions and ~300g weight keep it genuinely pocketable. It is positioned below the 20,000mAh PB720 (SKU 25188) and 25,000mAh 90597A, which target laptop users needing 100W+ output. The PB311 instead targets phone and tablet users who prioritise portability and fast two-port output over laptop-grade wattage. Furthermore, the absence of wireless charging keeps the unit slim and affordable relative to the magnetic PB561 (SKU 25208) reviewed separately.

Two Ports, Two Protocols, One Pocket

The USB-C port handles both device output at up to 20W and bank input at up to 20W — a single port that charges the bank or any PD-compatible device. The USB-A port adds a second simultaneous output path at up to 22.5W, covering Huawei Super Charge (SCP), Samsung Adaptive Fast Charge (AFC), and Qualcomm Quick Charge 3.0 devices. However, when both ports are active simultaneously, total output is capped at 5V/3A (15W combined) to maintain safe operating temperatures and balanced delivery. Additionally, a long-press of the power button activates a low-current mode for small accessories such as wireless earbuds and smartwatches that struggle to trigger charging at standard output levels.

---

Technical Specifications

Battery

USB-C Port (Input / Output)

USB-A Port (Output Only)

Multi-Port Combined Output

Self-Recharge

Protection and Certification

Physical

---

Device Charging Reference

---

Use Cases & Applications

Daily Commuting — Phone Top-Up on the Go

The PB311’s 16.5mm thickness and ~300g weight make it practical to carry every day alongside a phone and keys without adding perceptible bulk to a bag or jacket pocket. For commuters whose phone reaches 20–40% by midday, a midday top-up via USB-C at 20W brings an iPhone 15 from 20% to approximately 75% in 30 minutes — enough to carry through an evening without seeking a wall outlet. The digital percentage display removes the uncertainty of not knowing whether enough charge remains for a specific task.

Travel: Two Devices, One Charger

Travellers carrying both a phone and a wireless earbud case, a smartwatch charger, or a compact camera can use both ports simultaneously — the USB-C for the primary phone and USB-A for the secondary device. The 37Wh capacity is universally approved for carry-on luggage without paperwork, and the metallic casing provides better protection against the compression and movement typical of a packed bag than soft-body power banks.

Tablet and Light Laptop Supplementary Charging

The 20W PD output from USB-C covers fast-charging iPads and Android tablets up to their rated input speeds, and provides useful — if not maximum-rate — charging to USB-C laptops that support PD. For a MacBook or lightweight Windows laptop used at low intensity, 20W input slows battery drain even if it does not match the laptop’s full charging rate. This makes the PB311 practical as an emergency or supplement charger in situations where a full-wattage laptop charger is unavailable.

Low-Current Mode for Small Accessories

Many power banks fail to charge wireless earbuds and smartwatches because the device’s battery is too small to trigger the bank’s minimum output threshold — resulting in the bank timing out and switching off. The PB311’s low-current mode reduces output to a trickle, maintaining a stable charge delivery to these small devices without auto-cutoff interruptions.