【测评】有一种虚标，叫“惊喜”，实测绿联145W充电宝的极限参数

Summary

The script tests a 145W Greenlink power bank to analyze its parameters and performance. It methodically checks weight, temperature, charge, discharge time and power, charging time and efficiency, port voltages and ripple, overload currents, and simultaneous multi-port discharge limits. The power bank exceeds capacity expectations, but underperforms on multi-port discharge compared to single-port discharge, likely due to shared discharge channels between ports limiting max total output.

Takeaways

• 😀 The script discusses testing parameters of a 145W Green Link power bank model PB205
• 🔋 It has a 74Wh nominal capacity and achieved 74Wh discharge in testing
• ⚡️ It supports PD3.1 fast charging up to 140W
• 🔌 Has 3 output ports - C1, C2 and A with different protocols
• 👍 C1 achieved 157W discharge exceeding expectations
• 👎 But only 69W charging when used with other ports
• 💡 C2 delivered 53.6W exceeding rated power of 45W
• 🌡️ Monitoring shows good heat dissipation during testing
• ⏱️ Took close to 4 hours to fully discharge and under 2 hours to charge
• 📝 Multiple tests done to validate output capacity, voltages, ripple etc.

Q & A

What is the model number of the Green Link power bank being tested?

The model number of the Green Link power bank is PB205.

What charging protocols does the C1 port of the power bank support?

The C1 port supports up to PD3.1 140 watts of power.

How long did it take to fully discharge the 74Wh power bank?

It took 3 hours, 51 minutes and 9 seconds to fully discharge the 74Wh power bank to 0%.

What is the rated capacity of the Green Link power bank?

The rated capacity of the Green Link power bank is 90Wh.

What was the actual energy released when discharging the power bank?

74Wh of energy was actually released when discharging the power bank, exceeding the 72Wh expected based on the rated 90Wh capacity and 80% conversion efficiency.

What is the limit of simultaneous power output from ports C2 and A?

The simultaneous power output limit for ports C2 and A is 22.5 watts on port A and 20 watts on port C2.

What voltage does port C2 output when port A is also connected?

When port A is connected, port C2 outputs 5 volts instead of its 20 volt maximum.

What is the maximum power output possible from port C1?

The maximum power output possible from port C1 is 20 volts and 3.5 amps, or 69 watts.

How does multi-port operation affect maximum power output?

In multi-port operation, the maximum power output is less than the 110% of maximum power possible in single port operation.

What are the key conclusions about the Green Link power bank?

The key conclusions are that single port operation allows up to 110% of rated power, while multi-port operation limits C1 port power to 69 watts. The C2 port can output 53.6 watts simultaneously.

Outlines

00:00

😀 Testing Capabilities of a 145W Power Bank Model PB205

The first paragraph details the testing process and key capabilities of a 145W power bank model PB205. It provides discharge and charge measurements under different conditions like temperature, voltages, currents, power output from various ports, conversion efficiencies, etc.

05:07

🔋 Measuring Performance of Power Bank Ports A and C2

The second paragraph focuses on measuring the performance parameters like voltage, ripple, overload currents, and power limits for Power Bank ports A and C2 under different load conditions.

10:08

⚡ Simultaneous Discharge Testing of Power Bank Ports

The third paragraph examines the simultaneous discharge capacities of different port combinations on the power bank. It compares the rated power versus actual measured power when multiple ports are used concurrently.

Keywords

💡power bank

A power bank is a portable charging device for recharging mobile devices and other electronics. The video analyzes the specifications and performance of a 145W power bank model to assess its capabilities.

💡parameters

The key parameters tested on the power bank include voltage, current, power output, ripple, overload protection, charging/discharging time, efficiency and temperature. These provide quantitative performance data.

💡ports

The power bank has multiple output ports (A, C1, C2) which are tested individually and in simultaneous operation to analyze the power delivery limits.

💡charging

The video examines the charging performance including time taken, efficiency, power delivery and temperature regulation during charging from 0% to 100% capacity.

💡discharging

Discharging performance metrics analyzed include power output over time, usable capacity, temperature and discharging power with electronic loads.

💡load

Electronic loads are used to simulate real device loads by drawing set levels of voltage/current from each port to test power delivery capabilities.

💡temperature

Temperature is monitored during charging and discharging to assess the heat dissipation capabilities and safety of the power bank.

💡capacity

The usable and rated capacity in Watt-hours (Wh) is tested by fully charging and discharging the power bank to quantify actual performance.

💡efficiency

The power conversion efficiency from the wall adapter to the battery output is analyzed to determine energy losses in the system.

💡ripple

Ripple refers to small fluctuations in voltage. Lower ripple allows more stable power output within safe limits for connected devices.

Highlights

The Green Link 145W power bank supports PD3.1 140-watt charging

The nominal energy is 90Wh, but it released 74Wh in testing, exceeding expectations

It took 1 hour 44 minutes to fully charge the 96Wh capacity, 6Wh more than nominal

In winter testing, the 90Wh capacity and 80% efficiency specifications were met

Port A supports up to 22.5W with good voltage, ripple and overload performance

Port C2 supports up to 65W with a range of voltages and good ripple and overload

Port C1 supports PD3.1 up to 140W with a range of voltages and overload capacity

When ports work independently, output can reach 110% of max power rating

In dual-port mode, max total output is 69W on C1 and 22.5W on A

With C1 at max, C2 can still output 53.6W, exceeding its 65W rating

C1 doesn't reach 140W rating in multi-port use, but C2 exceeds its rating

Surprising output power from C2 in multi-port use, but C1 falls short

Parameters show both surprises and regrets - strong single port use, mixed dual/triple

C2 delivers 53.6W even when C1 is maxed out at 69W

Independent use allows up to 110% of ratings, multi-port is more mixed

Transcripts

Nowadays,

there are so many false labels on power banks. How many parameters does

this Green Link 145W power bank

have ? The one I got

is a model that supports PD3.1 140-watt charging.

Please note

that the model number is PB205.

Check the weight.

Check the charge. The power

has dropped to 0.1 watt.

Make sure charging is over.

The maximum temperature on the surface of the power bank is now 18°C.

The current temperature is 13°C.

Set the discharge current to 1 A.

Set the discharge voltage to 20 volts.

Start discharging

. Re-record the discharge power of 20 watts.

It

has been discharging for about 2 hours and 20 minutes.

At room temperature , the remaining power

is 13.9°C and 32%

. The maximum temperature of the power bank is 22°C.

The heat dissipation is still good.

It took 3 hours, 51 minutes and 9 seconds

to discharge the power bank completely to 0%

. The nominal energy of the 74Wh energy

power bank is 90Wh,

including the conversion efficiency of 80%.

In theory, it can release 72Wh of energy.

In fact, we released 74Wh of energy

, which exceeded expectations.

We now start charging it and

re-recording it.

Now it is charged to 83%.

The power started to drop.

The weather was too cold

. I turned on the heater.

The current room temperature of the power bank is 14.9℃.

The maximum temperature of the power bank is now 30℃

. The charging current has basically reduced to zero.

The battery has been charged to 100%.

It took a total of 1 hour and 44 minutes

to charge the energy. 96Wh

is 6Wh more charged than the nominal 90Wh.

The extra 6Wh

is the conversion loss of the switching power supply inside.

Before charging to 80%,

the charging power is maintained at 62 watts to 63 watts

and then gradually decreases.

Judging from the charging and discharging results,

Greenlian This 145-watt power bank

can still reach a capacity of 90Wh in winter.

Now test the A port.

These are the protocols supported by the A port. The

5V full load voltage is 4.996

ripple 50-60 millivolts. The overload current is 3.5A

9V. The full load voltage is 9.08V.

The ripple is 80 millivolts, the overload current is 2.5 amps,

the 12 volts full load voltage is 12.017, the

ripple is 80 millivolts, the overload current is 2 amps,

the 10 volts full load voltage is 10.008,

the ripple is 80 millivolts, the overload current is 3.5 amps,

measured at

port A. The limit power of 22.5 watts is good.

Let’s test the C2 port now.

These are the protocols that C2 port can support.

The full load voltage of 5 volts is 5.098.

The ripple is about 60 millivolts.

The overload current is 3.4 amps.

The full load voltage of 9 volts is 9.105 volts.

The ripple is 80 millivolts.

The overload current is 3.4 amps.

The full load voltage is 12.109.

The ripple is 80 millivolts. The

overload current is 3.4 amps.

The full load voltage of 15 volts is 15.112.

The ripple is 70 millivolts .

The overload current is 3.4 amps and

20 volts. The full load voltage is 19.96.

The ripple is 180 millivolts.

The overload current is 3.6 amps.

The limit power of the C2 port is also 65 watts.

Finally, let’s measure the C1 port.

These are the protocols supported by the C1 port.

It can support up to PD3.1 140 watts of power.

The voltage at 5 volts full load is 5.022 volts.

The ripple is 60 millivolts.

The overload current is 3.5 amps. The

full load voltage at 9 volts is 9.013.

The ripple is 90 millivolts.

The overload current

is 3.5 amps. The full load voltage at 12 volts is 12.005.

The ripple is close to 100 millivolts.

The overload current is 3.5 amps.

The full load voltage of 15 volts is 14.995.

The ripple is 70 mV.

The overload current is 3.5 amps. The

full load voltage of 20 volts is 19.90.

The ripple is 220 mV.

The overload current is 5.7 amps.

The last

full load voltage is 28 volts. The ripple is 27.82

, which is a bit not good.

The overload current is 520

millivolts. Surprisingly

not surprising, not surprising.

The

maximum discharge power of this power bank

reaches 157.86 watts

. I only have two electronic loads in my hand

, so I can’t directly test the three-port charging.

But I noticed that

when the C2 port and A port of the dual-port charging

are working at the same time,

they only have 20 watts.

That means

these two ports should be the same set of discharge channels.

Now

I first test the simultaneous discharge limit power of C2 port and A port.

I found that One phenomenon

is that when port C2 works alone, it can output 20 volts,

but when port A is plugged in,

it becomes 5 volts.

We give a load of 2 amps to port A. Port

C2 also gives a load of 2 amps

. Now port C2 and A Ports are all 10 watts of power.

Let’s increase it a bit and take a look.

We increased port C2 to 11 watts and

port A to 11 watts.

Now port C2 is 11 watts

and port A is 11 watts.

It can work normally

and still has 10% overload capacity.

Now

test it. The extreme power of port C1 and port A working at the same time

now overloads port A to 23 watts.

Port C1 can only output 20 volts and 3.5 amps.

If I increase the current a little more ,

there will be a current limit

even if I reduce the current of port A. Even though

the current of port C1 is only 2 amps, it cannot exceed 3.5 amps.

Unfortunately,

this dual-port mode

can only output a maximum of 69 watts plus 22.5 watts.

Now we measure the limit power output by ports C1 and C2 at the same time.

Port C2 directly adds 2.5 amps of current

C1. Add 5.5 amps of current

to the port

to start the C1 port

. The current cannot exceed 3.5 amps as before.

I want to try

how much power the C2 port can output

when the C1 port outputs 69 watts. Now I can confirm that the C2 port outputs 20 volts and 3.5 amps.

The output port can output 20 volts and 2.68 amps.

We now draw a conclusion.

When the three output ports work independently,

the maximum output power

can reach 110% of the maximum power.

However, when multiple ports are used for output,

the C1 port can only reach a maximum of 20 volts and 3.5 amps

, that is, In this mode,

the power of port A can reach 23 watts

. In this mode, the output of port C2 surprised me.

It can reach 20 volts and 2.68 amps

, which is 53.6 watts.

In general,

the parameters of this 145-watt power bank from Greenlink

There are surprises and regrets.

The output power is surprising

when the single port is working.

Although

the output power of the C1 port does not reach the rated value

when the multi-port is working , the output power of the C2 port exceeds the rated value

. I am JiDianJiang(JDJ)

. See you next time