Report on Your A123 26650 Cell Battery Here Please! :)

[deVries]

Now that many ES members have either purchased A123 26650 (cell) batteries from someone, such as cellman, or, better yet, you built your own battery, I think it is time to get some feedback from you about your battery.

Please post here to let us know what you can about the following:

1) When did you buy or make your battery? How many charge cycles do you have on it now?

2) What is the voltage & Ah rating?

3) Under WOT load do you know what the voltage sag is from its nominal voltage at the beginning of a ride & also near the end just before 80% state of discharge of battery capacity??? What motor are you using?

4) Do you have a build thread for this battery, or can you briefly tell us your design to make the battery?

5) Has the battery performed to your expectations, and is there anything you would do differently next time using this type of battery?

Please add any other comments you think is worth mentioning, and thank you for helping us learn more about this cell type & size.

[etriker]

In a time when it seems no consumer product is made to last the A123 26650 cells are in a class by themselves.

The cells in my pack say 2006 and are on their 3rd life. Dewalt battery packs then rc racing then etrike use.

If there is a more long-lasting, forgiving battery cell I have not found it.

Now running a 11s 5p A123 26650 main pack. Parallel in a Samsung 2600mah laptop cell 10s 4p extender pack for longer rides. Those are some darn good cells too !

[Hardcarve1]

1) About 18 months ago and have 180 charges through it at 60% of capacity 10ah.
2) 53v @ 20.7ah
3) I get about 3v max sag at half pack using a 9C pulling approx 50amps when starting off and 2v under WOT cruising along.
4) No build thread but had cell man spot weld 9 cells together that I then made into a 16s pack. see photo of cell mans work which is first class.
5) Battery performance is better than I expected. The cells are so well balanced I forgot the last time I did a balace charge. Building my next ride now and will be using these cells and cell man again.

I use my ride as a daily comuter (50km) and need dependability and saety as I charge inside my work place. I do 12amp charge and it takes a hour to have the batteries ready for the next ride. These batteries are perfect for my needs and I doubt if I have even stress them in the short time I have used them.