Front light battery

Author
Discussion

milu

Original Poster:

2,364 posts

268 months

Sunday 31st October 2010
quotequote all
This might get moved,but any way....
I have a niteflux vision stick which as of now is two years old but has only been used for a few rides the last two winters.
It cost £80 so not cheap
Anyway got it out the other day to find it won't charge( lithium-ion) at all.
I'm guessing it's gone too flat,but who charges their winter light in the summer?
The shop it came from are not much help so I'm wondering is there anyway I can revive this kind of battery?
It should be good for about 300 charges yet has only been charged about 10 times as each charge lasts up to 8 hours.
I'm pretty hacked off and don't feel like buying another expensive light.
Any suggestions?

Parrot of Doom

23,075 posts

236 months

Monday 1st November 2010
quotequote all
Could you post a picture of the battery?

I have a Hope Vision 2 LED, it runs from a custom 2* 18650 battery pack which has recently failed (ie 10 minutes runtime instead of 2 hours).

So what I did was buy 2 18650 cells (like large AA cells), a battery holder and a recharger. I bodged the cable from a spare extension supplied with the light. Its slightly cheaper than buying a replacement battery from Hope, but the real saving is that most of the cost was in the battery holder and recharger. Now I have those, I can simply buy extra cells and have hours and hours of light, for a fraction of the price.

Parrot of Doom

23,075 posts

236 months

Monday 1st November 2010
quotequote all
In fact, if this is your battery:



I would bet any money that it contains 3 18650 cells (3 * 3.7V = 11.1V). From the looks of that case, I doubt they're soldered together, just pushed together with springs. I reckon there's a good chance you could sort it for £20-ish.

Sign up here:

http://www.candlepowerforums.com/vb/

And ask the question. They're very helpful.

milu

Original Poster:

2,364 posts

268 months

Monday 1st November 2010
quotequote all
thanks parrot
that is the same as my batery but mine is only half or maybe 2/3rds size

milu

Original Poster:

2,364 posts

268 months

Monday 1st November 2010
quotequote all
i havent taken it apart yet as i didnt want to lose any chance with the shop.
i think that chance has passed now though so ill get stuck in.

Parrot of Doom

23,075 posts

236 months

Monday 1st November 2010
quotequote all
Each cell is 3.7V, so if your battery is 3.7V its one cell, 7.4 = 2 cells, etc.