Test/review of E-Strong ES-10 Dual usb charger

1 post / 0 new
HKJ
HKJ's picture
Offline
Last seen: 6 days 6 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7425
Location: Copenhagen, Denmark
Test/review of E-Strong ES-10 Dual usb charger

E-Strong ES-10 Dual usb charger
DSC_1110
I bought this charger with the above name, but as can be seen on the photos it also has another name, the type number (ES-10) is the same.
Official specifications:


  • Brand: E-Strong
  • Model: ES-D10
  • Design: Professional
  • Feature: Portable
  • Interface: USB2.0
  • Input: AC 100-240V / 50-60Hz
  • Output: DC 5V / 1A,DC 5V 2.4A
  • Certificate: CE,FCC
  • Optional Color: Black,Blue,Gold
  • Product weight: 0.049 kg

I got it from a Gearbest
DSC_1102
It was in a plastic bag and shipped in a envelope. There was no manual or usb cables included.
DSC_1111
DSC_1113 DSC_1115 DSC_1116
DSC_1112 DSC_1114
Measurements


  • 2.4A output is coded as Apple 2.1A
  • 1A output is coded as Samsung
  • Power consumption when idle is 0.13 watt
  • There is a blue led inside the charger.
  • Outputs are in parallel.
  • Weight: 51.2g
  • Size: 84 × 47.3 × 25.3mm

E-Strong%20ES-10%20Dual%20usb%20charger%201A%20230V%20load%20sweep
The 1A output can deliver 3.3A, it is a bit high.
E-Strong%20ES-10%20Dual%20usb%20charger%202.4A%20230V%20load%20sweep
The 2.4A output can deliver the same.
E-Strong%20ES-10%20Dual%20usb%20charger%20230V%20load%20sweep
And both outputs in parallel is also the same.
E-Strong%20ES-10%20Dual%20usb%20charger%20120V%20load%20sweep
At 120VAC the output current is slightly lower.
E-Strong%20ES-10%20Dual%20usb%20charger%20230V%20load%20test
No problems running one hour at 5V 2.4A.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.
Temp4764
M1: 53,7°C, HS1: 68,9°C
HS1 is the transformer.
Temp4765
M1: 55,0°C, HS1: 57,9°C
Temp4766
M1: 54,2°C, HS1: 56,6°C
The aliminum wrap equalize the temperature over the surface.
Temp4767
HS1: 54,5°C
Temp4768
M1: 54,1°C, HS1: 60,0°C
One of the usb connectors are hotter than the other, the hot one is very likely due to heat from the rectifier diode.
10ohm
At 0.5A the noise is 85mV rms and 538mVpp
5ohm
At 1A the noise is 125mV rms and 710mVpp
2ohm
At 2.5A the noise is 161mV rms and 714mVpp, the noise is on the high side.
Tear down
DSC_3938
Pressing the lid a bit with my vice made it pop open. The black cover is a aluminium piece.
DSC_3939
On this side is a fuse at the mains input, a mains switcher IC, a optocoupler.
DSC_3944
DSC_3945 DSC_3947
DSC_3946
DSC_3940
On this side is a bridge rectifier and the rectifier diode (SB1045L). There is a led between the usb connectors and a reference (431) for the optocoupler.
DSC_3941
DSC_3942 DSC_3943
There is a lot wrong with this charger, here is two details:
The CY2 capacitor is not a safety capacitor and it do not have 6mm between its two connections. This capacitor makes the charger into a death trap.
Under the opto coupler the distance between mains and low volt side is also supposed to be 6mm, it is maybe 1.5mm.
The charger failed a test with 2830 volt this makes it unsafe everywhere.
Conclusion
The only thing to say about this charger is: Stay away
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/