Search found 2343 matches

by agniusm
Nov 23 2011 1:47am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

I would personally charge them to see what happens can do a capacity test followed by a test to determine if they can discharge as you would like to normally. Iv had A123 headway thundersky calb and others.. iv just about had a cell from each go to 1.50 volts and i slowly charge them back up to the...
by agniusm
Nov 22 2011 3:28pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Got some results. 4 Korean cells where tested. We have tried to charge them with lab PSU and they would not take any charge, 0 AMP's. Taht"s what i thought, kaput.
by agniusm
Nov 22 2011 2:34am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Hi. I have to go to capital. There is someone with lab equipment to test them. I will get more info on the cells here when i have test results. Somehow i doubt that they will perform thou
by agniusm
Nov 20 2011 7:12pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Could someone brake it down for me the trick with bulbs to test the cells. Should i connect say 4 cells in series and then hook up some 12V light bulbs in parallel? What then? So i have a meter connected and keep checking on the voltage as well as time?
by agniusm
Nov 20 2011 6:29pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Thanx. My brother has a charger for cylindrical lithium cells he got with hes gun flashlight. I wander if that would suit? Here is that set: http://www.ebay.com/itm/UltraFire-CR123A-7-4V-Xenon-Flashlight-Battery-Charger-/150610500653?pt=US_Flashlights&hash=item231115dc2d#ht_5272wt_1063 , it says tha...
by agniusm
Nov 20 2011 9:47am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

i will see how it goes with paypal. If all good i am considering Headway route. I will lose on weight 8kg's but it looks like there is less confusion with them. I cant experiment with the cells cause by the time i will source and ship the charger my paypal claim date will expire.
by agniusm
Nov 20 2011 6:46am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Made a small video:
by agniusm
Nov 20 2011 4:39am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Thanx for your input. I guess i knew there was risk involved. Not true that you cant get genuine A123 cells but at what price. In Germany its 60 euro per cell http://shop.lipopower.de/A123-Systems-AMP20M1HD-A-20Ah-Folienzelle I wonder now, on that site they are marked as USA cells. Does any one know...
by agniusm
Nov 19 2011 6:16pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

I think its a bit early to say if i will get refund from paypal or not further more this is my personal matter. Next thing, i have attached a document with cell voltages, individual numbers and a person can make judgement on that, i supose you missed that. I understand what you mean, but the thing i...
by agniusm
Nov 19 2011 5:22pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

did you ever charge these cells and try to determine what the internal resistance is and what the capacity is of the low cells versus the cells that remained fully charged? is there a date stamp on any of them to indicate how long since they were manufactured? this knowledge is more important than ...
by agniusm
Nov 19 2011 7:29am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

i hope that i will get out dry out of this situation. the only thing is duty taxes. each time i get stuff i pay taxes.
by agniusm
Nov 19 2011 6:23am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

I have received your cells today. They are not what i have paid for. All of them are damaged, voltage is less than a 1 volt and dropping when measured when it should be 3.3 volts. I have started PayPal claim. I am very disappointed in this transaction. Zhang Richard victpower@victpower.cn 4:21 AM (9...
by agniusm
Nov 19 2011 6:20am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

miro13car wrote:agniusm,
from your Google data sheet ,
only made in Korea cells are around 1V , all USA-made cells are OK above 3V , right?
Thats correct. The only thing, i have measured again and after night they now show less .1, .2V
by agniusm
Nov 19 2011 6:17am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

bigmoose wrote:Were the tabs different lengths on the "US" cells versus the "Korea" cells? With the US tab length longer?
Hi, no the tabs are identical in length.
by agniusm
Nov 18 2011 1:39pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

indeed six of them were stamped as made in USA. These cells have a bar code sticker on negative tab with cell ID. my mate is talking with someone from A123 in Europe, i guess in Germany. We emailed them with a list of cells i got and numbers of individual cells. Will see the outcome. i will post the...
by agniusm
Nov 18 2011 1:02pm
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

Re: A123 from China. C and avoid

Thanx guys. I have payed trough PayPal with credit card. I hope to resolve this, other wise what a waste. I don't have any means to test them at the moment as was just gathering parts for my cargo bike project. I have done the paypal procedures, emailed seller bu 5 hours, no reply even when he is sh...
by agniusm
Nov 18 2011 9:49am
Forum: Battery Technology
Topic: A123 from China. C and avoid [SOLVED]
Replies: 149
Views: 19684

A123 from China. C and avoid [SOLVED]

Have purchased 24 20Ah A123 prismatic cells from China. Today i have received these cells, made in Korea. All the cells show below 1V and dropping. Here are the pics: http://i883.photobucket.com/albums/ac36/agniusm/IMG_20111118_132030.jpg http://i883.photobucket.com/albums/ac36/agniusm/IMG_20111118_...
by agniusm
Nov 01 2011 11:53am
Forum: E-Bike General Discussion
Topic: help choosing bms
Replies: 1
Views: 289

help choosing bms

hi all. this is my first post here. so i have decided to build ebike. my system will be as folows:
Crystalyte HS3540
24 A123 AMP20M1HD-A cells
2kw conttoller.

i need help choosing decent BMS to manage 24 cells not to bulky and with good balancing properties. thanx in advance.