Hello Guys,
This all started when T-mart advertised an Ultrafire 4000mAh 18650 cell. I dared Louis Huang of Tmart if indeed there is one, telling him I’d like to test one in my iCharger to find out once and for all if indeed there is a 4000mAh cell. Instead, he offered to me to try this:
Well, I accepted his offer and he sent me a pair to try a “discharge-capacity” test.
To say the least, I’m very much surprised and impressed with the results, thinking and believing that the name Soshine is not quite yet at par as those with the major Japanese and Korean cells. You be the judge with the results, fellow BLFers.
Nothing is mentioned about the PCB’s maker nor of the cell used, except the marking ‘Made in China’ printed in the label.
The cells came in at about 3.587V out of the box. Both cells overnight-rested voltage before tests had rested voltage at 4.14./4.15 volts.
Both cells were charged at 1A charging rate on every occasion.
All cells were discharged to 2.50V during the tests.
I have also tested the over-discharge protection. It kicked in at about 2.47V.
I have not tested the over charge protection voltage ceiling.
Please take note that the voltage read-out at the upper right-most in the display AFTER “DONE” is displayed is not the cut-off voltage but the voltage of the cell after it has slowly ‘bounced’ back to its normal voltage when the charger terminates the discharging process.
Nevertheless, below are some pictorial results of the discharge capacity tests I performed in my hobby charger:
Photo below shows a discharge capacity of 2871mah @1A discharge rate
Below is at 3A discharge rate at about 39min elapsed time
Below, DONE at 3A rate with 2915mah!
Below, surprise! My brand-new, unused Panasonic NCR18650PF 2900mAh came out slightly lower at 2882mAh @3A discharge
Logview result of the test on the Panasonic NCR-PF below:
Logview result of the 2nd test of the Soshine 2900 @3A, getting 2889mAh in the the pic below:
Pic below on the 2nd discharge test of the Soshine at DONE with 2889mAh
Below is at 5A discharge rate at about 24 min from start
Below, DONE at 5A discharge with 2907mah still!
Below is Cell # 2, DONE with 2870mah @ 1A rate. (Note: it is slightly shorter by about 1mm compared to the Panasonic protected)
Below is Cell #2 at about 26min from start, 3A rate
And finally below, DONE with 2883mah, @3A rate,