UPDATE PLEASE READ
just to clear this usa cells and korean cell from osn power if you order cells or a battery please let them know if you would like usa or korean
i had a lovley email back from e.s member april as there was a small mix up with my order but i am not to bothered as my korean cells look like thay are not the cheapy type
here is the email she sent
please dont let it stop you from getting your a123 cell kits or batterys from them i am happy with what i got funny thing is usa cells are made in korea
:lol:
Today I read the thread "osnpower battery 48v 20ah review" started by you, I just don't know how to express my feelings, something to be happy and something to be depressed.
I just thinking, am I the liar to you and the ES Forum customers?
First I do apologize for the mistake I had made on the ES forum price-list.
When I made the price-list of the A123 battery packs on the ES forum, I forgot to write that the battery pack will be made of not only the USA short tabs cells, but also the Korean short tabs ones.
And when we summarized your order, I forgot to ask you that you like your battery packs made of USA cells or Korean cells, and also you didn't ask me. So when I confirmed the order to our factory, I didn't mark that your battery pack should be made of USA cells, but asked the technicians to use the best short tabs cells (such as high capacity, low internal resistance and so on).
I am so sorry for my fault and beg your understanding.
I think you may know that we are always trying our best to do better service for you.
First, we need to match the cells and choose the most similar and balanced ones to make sure the battery pack will have high capacity and long lifecycle.
For we ran out of the 40A BMS, I ask my manager to give you the 50A BMS with the same prirce as 40A BMS to make sure you can get the battery early.
As our requirements of the battery pack size, the technician customized a special box for the BMS to make sure the safty of battery pack. I think you may have found that we have strict assembly procedures for the battery pack and we really spent a lot of time in it after you took apart the battery pack.
Now let alone all the things, let's talk about the USA cells and Korean cells.
I just wodering, did you test our 48V 20Ah battery pack?
Is there any other quality problems besides it is made of Korean cells?
To be honest, when we buy the cells from our special channel, we just can choose the better grade cells with higher cost than that of other suppliers, but we have NO right to pick up the only the USA cells, NOT the Korean cells.
That's to say, our cost for the USA and Korean cells are the same, NO difference.
So when our factory deals with the A123 20ah orders, if it is NOT especially asked by the customers that the battery pack should be made of USA or Korean cells, they just make the battery packs randomly. Because the technicians have tested our USA cells and Korean cells almost have same quality.
For example, if there are 16 pieces Korean cells have high quality, they will build the battery pack with Korean cells; or if there are 16 piece USA cells, they will build a A123 USA battery packs.
And also there is another thing I think I need to let you know.
About the Korean cells, there are two kinds in the A123 battery market.
One has almost the same quality as the USA cells(high capacity, low internal resistance, high discharge rate C and so on); but the other kind of the Korean cells with poorer quality(Low capacity, high internal resistance and low discharge rate C)
I checked very carefully with our technician, your battery pack is made of the Korean cells with the same quality as the USA cells, NOT the poorer quality Korean ones.
And also I would like to let you know, we have tested your battery pack with 20A constant discharge rate, it is about 19.3Ah.
So much for this, sorry for all the troubles caused by me.
Sincerely beg your understanding with a sales girl, who is sorry for her fault, but always trying her best to do better.
Many thanks,
Nancy