anyone try the new Black and Decker VPX battery? its an A123 LiFePO4

[gaspain]

these new packs just hit the market. Each pack costs about $15-$19usd at Homedepot

each pack contains 2 cells, each cell is a 123systems 3.2v 1100mah LiFePO4

A123 systems are the best batteries you can get.

Just need to figure out a wiring diagram to get 48v and 20AH....

[ee92018]

each cell 3,2V 1,1AH
to get 48v you need 15 cell's in serie   15 x 3,2v = 48v

to get 20AH you need 18 cell's in parallel 18 x 1,1AH = 19,8AH

total cell's 15 x 18 = 270

put 15 cell's in serie then take 18 pack's ( of 15 cell's in serie) and put them in parallel.

(-)-----48 v ----- (+)
     -1-2- ..... -15-                1
     -1-2- ..... -15-                2
              .
              .
     -1-2- ..... -15-                18

[Lanchon]

if they are 1.1Ah and not 2.3Ah, then that price is really way too high to be of any use.

[Julez]

I use them in RC planes, they are good for that.
But for bike applications, I would not take them, too expensive.
Try these instead:
http://cgi.ebay.de/Electric-Bike-Bicycle-Scooter-LiFePO4-e-bike-cells_W0QQitemZ280260876823QQcmdZViewItem?hash=item280260876823&_trkparms=72%3A1129%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14