Product Overview
The Anker Power Bank, model A1288 (PowerCore 20K), is engineered for users who demand reliable portable power without bulk. With a generous 20,000mAh lithium-polymer battery, it delivers consistent energy to keep your essential devices powered throughout the day—whether you’re commuting across town, traveling internationally, or working remotely in areas with limited access to outlets. Designed with both form and function in mind, this compact charger supports fast charging for a wide range of modern gadgets, including iPhones, Samsung Galaxy phones, tablets like the iPad 9th Gen, AirPods Pro/3 with wireless case, and Apple Watch Series 5 and 7.
Featuring three output ports—two USB-A and one USB-C—this power bank enables simultaneous charging of up to three devices at once. That means you can plug in your smartphone, earbuds, and smartwatch all from a single source, eliminating the need for multiple chargers cluttering your bag. Despite its substantial capacity, the Anker 335 maintains a slim profile measuring just 6.57 × 3.28 × 0.96 inches and weighs only 1.07 pounds, making it effortlessly portable for everyday carry or travel.
Key Features
- Super Huge Capacity: The 20,000mAh battery provides enough power to charge an iPhone 13 more than four times or a Galaxy S22 Ultra over three times on a single full charge. Ideal for extended trips or back-to-back meetings where wall sockets are scarce.
- Fast Charging Technology: Delivers up to 20W max output across all three ports, enabling rapid charging for compatible devices. For example, you can charge an iPhone 13 to 50% in approximately 37 minutes when paired with a compatible adapter and cable.
- Multi-Device Charging: Equipped with two USB-A ports and one USB-C port, allowing you to charge your phone, tablet, earbuds, and Apple Watch simultaneously from a single power bank—perfect for multitaskers and families on the go.
- Trickle Charging Mode: Safely and efficiently charges low-power accessories such as Bluetooth speakers, earphones, fitness trackers, and other small electronics without risking overcharging or damaging delicate circuitry.
- Broad Compatibility: Works seamlessly with a wide range of devices including:
- Phones: iPhone 15/14/13 series (all models including Pro variants), Samsung S21/S22, Google Pixel 5/6
- Tablets: iPad 9th Gen
- Wireless Earbuds: AirPods Pro / 3 (with wireless charging case)
- Smartwatches: Apple Watch Series 5 and 7
Technical Specifications
- Model: A1288
- Capacity: 20,000mAh
- Battery Type: Lithium Polymer
- Dimensions: 6.57″ L x 3.28″ W x 0.96″ Th
- Weight: 1.07 Pounds
- Output Ports: 2x USB-A, 1x USB-C
- Max Output Power: 20W
- Recharge Time: Approximately 6.5 hours when using a PD-compatible charger
Benefits & Use Cases
This power bank is ideal for professionals constantly on the move, digital nomads, students, and anyone who relies heavily on mobile technology throughout the day. Whether you’re heading out for a long flight, attending an outdoor event, or simply want peace of mind during daily routines, the Anker 335 ensures your devices stay powered without relying on wall outlets.
Its multi-port design shines when used with Apple ecosystems—charging your iPhone, AirPods, and Apple Watch all at once from a single device. This reduces cable clutter and saves time, especially during morning routines or before important calls. The inclusion of both USB-A and USB-C outputs adds flexibility, supporting older Android phones and newer USB-C-enabled devices alike.
Thanks to its trickle charging mode, you can also safely power smaller gadgets like fitness bands, e-readers, or portable Bluetooth speakers without worrying about compatibility issues or battery degradation.
Important Notes
- A USB-C to Lightning cable is not included; if needed for iPhone 14 series and earlier models, one must be purchased separately.
- An Apple Watch charging cable is also not provided—use your existing magnetic charging accessory.
- Not compatible with MacBook Pro 13″ (2019) or MacBook Pro 16″ models due to higher power requirements.
- Do not use the power bank in humid environments to prevent oxidation of the USB ports.
- If performance declines due to dust or moisture, gently clean the USB ports with alcohol swabs to restore contact efficiency.
- For optimal charging via the USB-C port on iPhone 14 series and earlier models, a USB-C to Lightning adapter (not included) is required.
What You Get: Anker 335 Power Bank (PowerCore 20K), USB-A to USB-C cable, welcome guide, and an 18-month stress-free warranty backed by friendly customer service.
