Just a question about building a 2P A123 style pack:
i want to build a 5s2p, so can i just build 2 independant 5s pack, and after that, simply use the output power leads and connect them in parallel using a "Y" harness make with dean plug???

If YES, could i charge this 5s2p pack using this "Y" harness to charge them in same time on my Hyperion 0610i??

Thank you!

if your charger can do it im sure. you might wanna balance the packs. i do not think it is NEEDED but i would reccommend it.

and yes you can do what you are wanting to do.

it would have a little more wiring but it is ok to do.

I got 6 of the 1200mah LifePo4 cells from united hobbies. (it doesnt look like they have them in the store any more) I got them to build (3) 2 cell Rx packs for my nitros and they work fine for this application. They do charge fast like a a 123 but they hold voltage for s#!t under load. They claimed 20c on the United Hobby store, but at only a 5A constant load (thats the most I can test to with my chargers discharge mode) they hit the 2V cutoff I set at only 850mah or so. As soon as the load was removed they recovered quickly to the nominal 3.3v and were able to discharge another 100mah at a 2A load. These low loads are no where near 20c advertised capability.

I know this isnt for the 2700 cells that you linked in this thread, but I figured I would share my experience with smaller the LifePo4 cells. The 2700 might be better than the smaller ones.

I heard the United hobbies cells are not as good as the A123's and since they are even more expensive why bother.

Yes you can build 5s1p packs then use a harness to convert them to either a 10s or 5s2p pack.

I went the 6s route. The A123's are slightly lower voltage then Lipo's so the 6s pack is more like a 5s lipo pack.

I use 3s packs and then harness them to a 6s pack. Nice thing is you can then zip charge them.

Zip charge = 10-15 min charge and no need to buy a charger just a coupel of bucks of parts :)

Highflier

ya thats the only thing i was thinking about.

i know a123s are nice so why buy these other ones.

but i figured if they were what they say (2700 mah 20c 3.2v) why not give it a try.