The Belkin UltraCharge Pro Laptop Power Bank 25K (BPB039) is designed to safely and efficiently charge a wide range of devices. This article explains how the charging ports work and how much power each port can deliver.
USB‑C “In/Out” Port
The USB‑C port on BPB039, labeled in/out, supports both charging the power bank and charging other devices.
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Charging BPB039 (input)
Use the USB‑C port to recharge the power bank with a compatible USB‑C charger that supports up to 90W input.
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Charging your devices (output)
Use the same USB‑C port to charge compatible devices, including laptops, with up to 140W output.
BPB039 automatically detects whether the USB‑C port is being used for input or output.
USB‑A and USB‑C Output Power
When using BPB039 to charge other devices:
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USB‑C “in/out” port
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Up to 140W output, suitable for laptops and tablets
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USB‑A port
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Up to 18W output, ideal for smartphones and accessories
If more than one device is connected, charging power is shared across all active ports.
Helpful Tips
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Use USB‑C for high‑power devices
Connect laptops and tablets to the USB‑C “in/out” port for faster charging.
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Recharge BPB039 with a high‑wattage charger when possible
A USB‑C charger that supports higher wattage can recharge the power bank more quickly (up to 90W).
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Expect shared power when charging multiple devices
Charging speeds may be reduced when more than one port is in use.
Frequently Asked Questions
Q1: Can BPB039 charge a device and be charged at the same time using USB‑C?
Yes. The USB‑C “in/out” port automatically switches between input and output depending on how it is connected.
Q2: Why is my device charging more slowly when multiple devices are connected?
When multiple devices are connected, BPB039 shares total available power across all active ports.
Q3: Which port should I use to charge my phone?
You can use either port, but the USB‑A port (up to 18W) is well-suited for phones and smaller devices.