How to choose your power bank

OH apparel is compatible with any USB-C output power bank, giving you the flexibility to choose the one that suits your needs. Both 5V and 9V power banks work seamlessly, but using a 9V power bank allows your apparel to reach higher temperatures for colder conditions.

When choosing a power bank, consider its capacity and output. A 10,000 mAh power bank might only keep you warm for 4–6 hours, while a 20,000 mAh model lasts 8–12+ hours. Look for power banks with USB-C Power Delivery (PD) to ensure reliable performance and automatic adjustment between 5V and 9V outputs. For optimal warmth, a power bank with at least 15W output is recommended, while 18W or higher is ideal for achieving maximum heat.

We don’t have a favorite, but we’ve tested out the Anker 1383, Anker 334, ororo PD 5K and ororo B25A and found that they all work well with OH apparel. 

OPENHEAT apparel is compatible with most USB-C output power banks in the market, giving you the flexibility to choose the one that suits your needs. Both 5V and 9V power banks work seamlessly, but using a 9V power bank with Power Delivery(PD) will provide the best heating performance.

When choosing a power bank for your OH heated clothing,  keep two things in mind: capacity and power output. 

Capacity: A 10,000 mAh power bank typically provides 4–6 hours of warmth, while a 20,000 mAh one can last 8–12 hours or more.

Power Output: Make sure the power bank has at least 15W output to keep your gear running smoothly.

Our heated apparel can operate in two modes:

  • Standard Mode (5V): Requires a power bank with 15W output.
  • High-Performance Mode (9V): Needs a Power Delivery (PD) power bank with 18W output for maximum heating performance and long-lasting warmth.

While we don’t have a favorite, we’ve tested out a few most popular power banks out there: Anker 1383, Anker 334, Energizer and Mophie. They all work well with OPENHEAT heated apparel. 

Battery Model

Retail Price

Rated Capacity

Operating Voltage

High Setting

Medium Setting

Low Setting

Anker A1383

$79.99

20000 mAh 

9V

6 hrs

8 hrs

16 hrs

Anker 334

$39.99

10000 mAh 

9V

3 hrs

4 hrs

8 hrs

Energizer

$29.99

20000 mAh

9V

6 hrs

8 hrs

16 hrs

Mophie

$29.99

5000 mAh 

9V

1.5 hrs

2 hrs

4 hrs

 

💡About Battery Capacity

Battery capacity refers to the amount of energy a battery can store and provide to a device over time. It is typically measured in milliamp-hours (mAh) or watt-hours (Wh), with larger values indicating a higher energy storage and longer usage time.

 Milliamp-Hours (mAh)

  • What is it?
    mAh stands for milliamp-hours, and it measures the charge capacity of a battery. It indicates how much electric charge a battery can store and provide over time. Essentially, it's a measure of how much current a battery can supply over an hour.
  • How is it used?
    mAh is commonly used for small devices like smartphones, tablets, and other portable gadgets. It helps to give you a rough idea of how long a battery can power a device before it needs to be recharged.
  • What does it mean?
    • A higher mAh rating means the battery can last longer, assuming it is used at the same current draw.
    • For example, a 1000mAh battery could provide 1000 milliamps (1 amp) of current for one hour, or 500 milliamps for two hours.
  • However, mAh doesn't take voltage into account, which is an important factor in how much energy a battery can deliver.
    •

    Watt-Hours (Wh)

    • What is it?
      Wh stands for watt-hours, and it measures the total energy capacity of a battery. Unlike mAh, Wh is a unit that directly measures the energy the battery can deliver over time, factoring in both the capacity (mAh) and the voltage (V) of the battery.
    • How is it used?
      Wh is typically used for larger devices, like power banks, laptops, and electric vehicles, where you need to understand not just how much charge a battery can store, but how much total energy it can deliver.
    • What does it mean?
      • Wh gives you a more accurate picture of how much total energy a battery can provide over time.
      • It's calculated as:
        Wh=mAh×Voltage (V)÷1000

    This formula shows that you can convert mAh into Wh by considering the voltage of the battery.

    Example: If you have a battery with 10,000 mAh at 3.7V:

    Wh=10,000 mAh × 3.7V÷1000=37 Wh

    So, your 10,000 mAh at 3.7V battery can store 37 watt-hours of energy.