【测评】有一种虚标，叫“惊喜”，实测绿联145W充电宝的极限参数

机电匠

22 Feb 202411:57

Summary

TLDRThe 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.