Test/review of Eizfan C2 USB Charger, USB supplement

1 post / 0 new
HKJ
HKJ's picture
Offline
Last seen: 3 days 22 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7432
Location: Copenhagen, Denmark
Test/review of Eizfan C2 USB Charger, USB supplement

Eizfan C2 USB Charger, USB supplement
DSC_5090
This review will only be about the USB output, i.e. power bank function in the charger.
Read the original review for charge functions here
I first charger I got had a production fault and the USB output did not work. Eizfan shipped a new charger to me and this time the USB output worked.
Power bank


  • USB output is coded as Apple 1A
  • USB output will turn off after 10 seconds with less than 80mA load
  • Battery drain is below 0.1mA when USB output turns off.

Eizfan%20C2%20%28SA18650-33%29%20%231%20load%20sweep
Eizfan%20C2%20%28SA18650-33%29%20%232%20load%20sweep
With one battery the charger can deliver about 1.6A current on the USB output.
Eizfan%20C2%20%282xSA18650-33%29%20load%20sweep
With two batteries the current is 2.2A
Eizfan%20C2%20usb%20out%2010ohm%20%28SA18650-33%29%20%231
Eizfan%20C2%20usb%20out%2010ohm%20%28SA18650-33%29%20%232
Eizfan%20C2%20usb%20out%2010ohm%20%282xSA18650-33%29
With a 10ohm (0.5A) load the charger can maintain output for about 3 hours with one battery and nearly 7 hours with two batteries
The batteries are disconnected at about 3.1V
Eizfan%20C2%20usb%20out%205ohm%20%28SA18650-33%29%20%231
Eizfan%20C2%20usb%20out%205ohm%20%28SA18650-33%29%20%232
Eizfan%20C2%20usb%20out%205ohm%20%282xSA18650-33%29
At 5ohm (1A) it is a bit above 1 hour with one battery and 3 hours with two batteries.
10ohm
There is 16mV rms noise and 195mVpp noise.
5ohm
There is 36mV rms noise and 269mVpp noise.
Conclusion
From the first review: As a charger it works fine with both LiIon and NiMH.
The USB output handles 1A with one battery and 2A with two batteries and it can maintain output until the batteries are empty, but the coding is a bit old and only reports 1A
Both charge and USB power bank is good.
Notes
The charger was supplied by Eizfan (Efan) for review.
Here is an explanation on how I did the above charge curves: How do I test a charger
Read more about how I test USB power supplies/charger

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