2x 4000mah lipo batteries for $30 on ebay

collinE · Post by **collinE** » Sat Dec 20, 2008 8:42 pm

LINK
No screen-stretching links, please! -B6

sorry for the long link. the url thing wasn't working. just cut and paste the whole thing.

says they have 10 available. 5.7 x 1.8 x .5 inches

if you separate the two cells and lay them next to each other, it would only be a quarter inch! for 4ah! for 15 each!

palmertech · Post by **palmertech** » Sat Dec 20, 2008 11:11 pm

Bought a pair for great justice. If these are true capacity, great find.

hailrazer · Post by **hailrazer** » Sun Dec 21, 2008 4:35 pm

The seller actually has 991 available.

I don't think he'll sell out anytime soon

But it is a good find if they are good quality and actually 4000mAh.

jjhammerstein · Post by **jjhammerstein** » Sun Dec 21, 2008 7:08 pm

There's one making it's way to my house too.
Excellent find!

http://www.batteryspace.com/index.asp?P ... rodID=3954
Is that the proper charging circuit?

eurddrue · Post by **eurddrue** » Sun Dec 21, 2008 7:26 pm

wow, if jjhammerstein's charging circuit will work this would be awesome for a noac

jjhammerstein · Post by **jjhammerstein** » Sun Dec 21, 2008 7:59 pm

eurddrue wrote:wow, if jjhammerstein's charging circuit will work this would be awesome for a noac

Isn't it kinda big for that?
Not the circuit, the batteries.
They're 14.5cm long, basically 6".

hailrazer · Post by **hailrazer** » Sun Dec 21, 2008 8:19 pm

jjhammerstein wrote:
eurddrue wrote:wow, if jjhammerstein's charging circuit will work this would be awesome for a noac
Isn't it kinda big for that?
Not the circuit, the batteries.
They're 14.5cm long, basically 6".

Yea they are big. The 5000mAh I used in both my portables are only 3.5"x3.25". But they were $25 each , so $50 a pair + shipping. So about $58 a set, whereas these will be $15 a set shipped.

eurddrue · Post by **eurddrue** » Sun Dec 21, 2008 11:01 pm

jjhammerstein wrote:
eurddrue wrote:wow, if jjhammerstein's charging circuit will work this would be awesome for a noac
Isn't it kinda big for that?
Not the circuit, the batteries.
They're 14.5cm long, basically 6".

6" would be a dream compared to my case...

evilteddy · Post by **evilteddy** » Mon Dec 22, 2008 4:33 am

You'll need a protection circuit as well because these types of batteries do not have a protection circuit built in and will just discharge until they kill themselves.

jjhammerstein · Post by **jjhammerstein** » Mon Dec 22, 2008 8:33 am

hailrazer wrote:
jjhammerstein wrote:
eurddrue wrote:wow, if jjhammerstein's charging circuit will work this would be awesome for a noac
Isn't it kinda big for that?
Not the circuit, the batteries.
They're 14.5cm long, basically 6".
Yea they are big. The 5000mAh I used in both my portables are only 3.5"x3.25". But they were $25 each , so $50 a pair + shipping. So about $58 a set, whereas these will be $15 a set shipped.

Yours are pretty boxy. These are nice because they're long and low profile, you could put them anywhere without much change in final dimensions on the case.

hailrazer · Post by **hailrazer** » Mon Dec 22, 2008 3:37 pm

jjhammerstein wrote: Yours are pretty boxy. These are nice because they're long and low profile, you could put them anywhere without much change in final dimensions on the case.

Huh? 3" longer and the same width and thickness is better ?

You lost me on that one?

Kurt_ · Post by **Kurt_** » Mon Dec 22, 2008 4:09 pm

If these are the same kind I used (definitely not the same package, but they look the same), then two lying side-by-side are almost exactly the dimension of a mini-SNES, and will power that, a rather loud sound amplifier, and an LEd-modded (6 LEDS) PSOne screen for over 6 hours. I never actually ran out of batteries, I just decided to stop testing at six.

collinE · Post by **collinE** » Tue Dec 23, 2008 12:20 am

There is a site that you can buy safety circuitry for these batteries... only a couple of dollars and you can choose a size. Sometimes the ad pops up in these forums, but I can't remember what address is. Anyone?

hailrazer · Post by **hailrazer** » Tue Dec 23, 2008 7:19 am

collinE wrote:There is a site that you can buy safety circuitry for these batteries... only a couple of dollars and you can choose a size. Sometimes the ad pops up in these forums, but I can't remember what address is. Anyone?

Umm maybe the link that jjhammerstein posted above ?

Crispy · Post by **Crispy** » Tue Dec 23, 2008 8:35 am

They look good, but pretty long right?