> On 01/01/2011 14:45, RussellMc wrote:
> > Amazingly wide ranging& =A0well pried and interesting site.
> > Blackest of holes - not apparent at first.
> > Well worth a browse by anyone electronically inclined, or any RC model
> > hobbyist.
> >
> > =A0 =A0 =A0 http://www.hobbyking.com/hobbyking/store/uh_index.asp
>
> Thanks, looks like one to add to my "Electronics Vendors" bookmarks..

This OTTOMH so approx prices, ratings etc.

I note that they have liFePO4 packs at stunningly low prices.

Their "genuine A123" 18650 ~ 1100 mAh x 1 cell is about $13
Their "genuine A123" 25650 ~ 2200 mAh x 1 cell is about $18

BUT they have a "similar" name brand pack rated at 4500 mAh 9V pack
arranged 3s2P  6 cells for about $30 or about $5/cell for 2200 mAh a
cell LiFePO4.  There is about zero chance of these being A123 cells
and there are some web reports of some of these swelling somewhat BUT
if they are anything like "proper" LiFePO4 this represents amazing
value for money. If they all swell and die young then they are as good
as their warranty, or worse.

As a guide, 12 of these cells would make an about 6.6 Ah x ~ 12V
battery for about $US60. A good quality 7Ah 12V SLA "brick" costs a
good proportion of that. If these cells are anything like proper
LiFePO4 they would utterly trounce the SLA in cost per cycle terms and
all other specs for only 25% - 50% more capital outlay. Suggesting
that maybe they are not so real ? :-) :-(.

Anyone want to find out?

I very well may. They have an Australian outlet so postage may be
reasonable. TBD.



            Russell

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