Q1: Is this power bank compatible with fast charging for the iPhone 17 series?

A: Yes. The Jescuok E86 Pro supports up to 140W PD 3.1 fast charging and is fully compatible with the 40W (60W MAX) charging for iPhone 17, 17 Pro, and 17 Pro Max.

*Note: iPhone 17 Air supports a maximum of 20W charging due to its ultra-thin design.*

iPhone 17: ~50% in 20 minutes

iPhone 17 Pro: ~50% in 20 minutes

iPhone 17 Pro Max: ~50% in 20 minutes

iPhone 17 Air: ~50% in 30 minutes

*Data based on internal lab testing. For maximum power input, use a 60W PD-rated cable.*

Q2: Why is my power bank providing fewer charges than expected?

A: Usually an external battery could supply 60%-70% power to other devices. Approximately 30-40% of the battery capacity is lost in circuit heat and voltage conversions. A fully charged Jescuok 27,000mAh power bank typically delivers about 16,200 to 18,900mAh.

Q3: Why can't the power reach 140W?

A: To reach 140W, you need to use a cable that supports PD 3.1 and a device that supports PD 3.1 input such as the 2021 MacBook Pro 16".

Q4: Why is this power bank larger and heavier than regular ones?

A: Real capacity has real weight. To honestly deliver 27,000mAh and 140W of power, we use premium, high-density batteries and robust components. Many lighter power bank achieve their low weight by using inferior cells that never meet their advertised specs. Our weight is the weight of guaranteed power.

Q5: Is the power bank allowed on flights?

A: Yes, our 27,000mAh (99.9Wh) power bank meets the regulations of TSA(Transportation Security Administration) for carring board(=100wh˜27,027mAh).

Note: Please check airline and FAA policies for onboard usage before flying.

Q6: How do I use the flashlight mode?

A: To turn on the built-in LED flashlight, press and hold the flashlight button for 4 seconds.

Then, each additional press of the button will cycle through the 4 available modes: High Brightness, Low Brightness, SOS, and Strobe.

To turn the flashlight off, simply press and hold the button again.

Q7: How long does it take to recharge the power bank?

A: The total charging time depends on your charger's output and the ambient temperature.

The Jescuok E86 Pro supports ultra-fast 140W PD3.1 charging. Under ideal conditions (77°F/25°C) using a compatible 140W PD charger block and cable, it can be fully charged in approximately 1 hour.

65W fast charger - 2.25 hours, 45W fast charger - 3.25 hours, 20W charger - 7.5 hours.

Q8: Why does the charging speed vary for different devices?

A: Charging speed depends on the charging capabilities of your device, the power output of the charger you use with the power bank, the type of cable used, and the fast charging protocols supported by all three.

The overall speed will be limited by the slowest component in the chain (device, cable, or charger).

For the fastest speeds, ensure your device, cable, and the charger plugged into the wall all support high-wattage output and compatible fast-charging protocols.

Q9: Why do the voltage, current, and remaining time on the display change periodically?

A: When multiple devices are connected, the screen automatically cycles through to show the output voltage, current, and estimated charging time for each port.

When charging and discharging occur simultaneously, only the input voltage, current, and remaining time are displayed.

Q10: Does it support pass-through charging?

A: Yes, the power bank supports pass-through charging.

However, it requires a charger rated at 20W or higher, and the input power must exceed the output power to enable this feature.

Q11: Why does USB-A port show 5.1V-0.1A output when the power bank is not connected to any device?

A: Even if the device is unplugged when charging with USB-A, it will continue to output a small current to prevent the device from being fully charged, and it will last for about 2 minutes.

In trickle-charging mode, the output of USB-A is 0.5W.

Q12: How is the output power distributed when charging from multiple ports at the same time?

A: The USB-C1 port features a dedicated circuit, guaranteeing its full 140W output even when all ports are in use.

The USB-C2 and USB-A ports share power. When used simultaneously, their combined output is limited to 15W.

The unit has a maximum total output capacity of 162.5W.

Q13: Why does the charging speed change for the same device at different times?

A: This is normal and is part of intelligent battery management for safety and longevity.

Battery Level: Charging is fastest between 20%-80%. It slows at very low or high levels for safety and battery health.

Temperature Control: If the device or power bank detects elevated temperatures, it will automatically reduce power to prevent overheating. This is a critical safety feature.

Smart Features: OS features (e.g., Apple’s Optimized Charging) may delay full charging based on your usage habits.

Q14: Is my device compatible with fast charging?

A: Our power bank supports a comprehensive suite of fast-charging protocols (PD3.1, PD3.0, QC4+, QC3.0, PPS, AFC, SCP, FCP etc.), making it compatible with the vast majority of fast-charging-enabled phones, tablets, and laptops on the market from brands like Apple, Samsung, Google, and more.

If your device or cable does not support fast charging, the power bank will automatically provide safe, standard charging.

Q15: What charger should I use to recharge this power bank itself?

A: To recharge the 140W power bank at its maximum speed, use a 140W PD3.1 (or later) compatible charger block and charger cable. (100% Full recharge in 1 hour)

You can also use lower-wattage chargers (e.g., 65W, 45W, 20W), but the recharge time will be longer proportionally.

Instructions before use

1. For better battery level accuracy, we suggest:

Fully discharging to 0%. Then charging to 100% without stopping.

2. For optimal performance and efficient operation, always use a compatible charger and cable when charging the power bank or using it to charge other devices.