I bought them especially because of graphs I saw here, and I have only 1A discharge equipment (hobby charger) so Ill talk only about 1A discharging curves.
From first reviews here (based on wich we all bought these cells), this cells hold 3,8V after 30 mins discharging with 1A…
In my testing, all Himax cells had similar results as any other cheap cell. (better then some, worse than some) - specifically, all cells come down to a*t least 3,6V *and below after a minute or so (discharging with 1A)….
So this is a big big difference. And after 30 mins they can be way down. SO thats 0,4-0,5V difference in voltage sag previously and now… (I didnt had previous now, this is my first purchase of Himax cells, I wanted something better then Trustfire flames and this is what I got)
Just now I started measuring one cell, it dropped to 3,50V in 10 seconds!!! And thats at only 1A… (some cheap 1000mAh Ultrafire cells I have hold 3,64-3,60 after a minute…)
Can you comment on that?
PS: I think you made a mistake, you probably wanted to say that you are “NOT” concerned in pingyi’s honesty.
I dont know about my equipment, but even if readings are not nominally correct, they surely have some comparative value, and by these tests these cells are not better than my Trustfire flames, just some 200mAh higher capacity. (because Trustfire flames i regurarly measure just below 2000, and these I regurarly measure, with some exceptions, just below 2200, when discharging with 1A to 2,8V)
Yes, at some point I will do this, especially for the weird 1000mah cells.
Just that they are unwrapped and naked now, I am also planning to rig up a more robust holder someday to provent a naked battery from going poof during testing.
For anyone that may not know, I am a vendor for these batteries.
Before I start to dig to deep, I want to get a few things clear. Honestly, I don’t care about these batteries. I’m NOT defending them. I will simply stop carrying them if the quality is poor. I stock many brands of batteries and flashlights. I will not hesitate to pull these off the shelf as I have done with other items; if they are junk.
I am not on this forum to bicker. I really don’t want to point fingers nor do I want to tell somebody they are doing something wrong. I’m on this thread to get to the bottom of a flaw from a manufacturing vendor that I trusted. To this point I still do; with some uneasy doubt. We can only hope for the best.
The ultimate reason I need to get to the bottom of this is the customers!
I listen to my customers as these batteries where recommended by a few different enthusiasts. Now that we may have a flaw, it is important that all the customers that were sold batteries in the past had received what they paid for. It is a duty to do this service so I sleep better at night.
This thread has led me to purchase test equipment to run the batteries through. I want to do these tests per Samsung specifications in my own controlled environment.
Many people on and off these forums have dealt with me as a supplier. If you have, you know, or at least I think you know, that I do my best to cater on a personal level. This is how I run my small growing business and how I plan to keep it.
I will eventually come to a conclusion on whether I will continue to stock these batteries based on the test results. These batteries don’t seem to under or over perform more than any other brand that I carry. Nor has anyone ever contacted me and complained about the performance of these batteries.
Yes and no,
All i was trying to say is thats not how Samsung did there testing to come up with the numbers. My bigger concern it the Sony cell mixed in.
@ Troop, not wasted. You can buy shrink wrap tubing from any electronics/electrical supplier. Get some the right size, cut off the right length and apply enough heat with a heat gun to re shrink wrap it. It will probably bet a bit thicker and better than the cheezy shrink wrap these cells come with from the factory.
The HiMax batteries I bought from you on 7/2012 are still going strong and giving the rated capacity, some are even giving a little more than the rated capacity after several charge cycles.
I got this email from PingYi. Here’s what he told me and sent me to prove his case about this whole mess here.
We have the results of the survey,our batteries are all brand new and good,with samsung core.and the BBS post are our competitors,who want to destroy our company’s reputation, he is a Chinese, not American, intentionally destroy our brand, please don’t believe liar，here is a details,see email attachments.
thanks again,and your positive will be a great encouragement for us. If there’s anything I can help with, don’t hesitate to tell me.best wishes and have a nice day!
regards,
from pingyi.co.ltd
And here’s the picture he sent me that you can clearly see in post 30 here if you go back in look.
