lifepo4 battery for this headlight

[EbikeWizard]

http://www.ebay.com/itm/Optronics-Platinum-Burners-Series-Driving-Light-Kit-QH-16CTW-/380499805049?pt=Motors_Car_Truck_Parts_Accessories&hash=item58978e4379&vxp=mtr

Optronics Platinum Burners Series Driving Light

i want to go with a Headway battery for this headlight
i have been using a 12v 12ah SLA battery which works fine if you charge it once every 2 nights that you use it

in the description of the headlight is says that it needs 55 watts and 12 volts
so it would need 4.5ah

so i figure i'd use 2 12v 3.2ah headway lifepo4 cells in parralell for 12v and 6.4ah

is there a bms and charger for this?

 

[dnmun]

you should use a DC-DC converter from your regular battery. you can buy a 4 cell BMS from ping if you wanna do this.

 

[dogman dan]

I'll take some of those 12v lifepo4 cells too.

You obviously are talking about something I haven't heard of, likely a 4s package of some kind. A few A123 round cells would also work well.

55 watts, I assume those are halogen?

4s lifepo4 would be easy to charge with any RC lipo charger. Handy things to have, charge your headlight, safely single cell charge an unbalanced cell in your traction pack, etc etc. There's the charging side of your bms, leaving you only needing a low voltage warning buzzer for the lights.

 

[EbikeWizard]

I'll take some of those 12v lifepo4 cells too.

You obviously are talking about something I haven't heard of, likely a 4s package of some kind. A few A123 round cells would also work well.

55 watts, I assume those are halogen?

4s lifepo4 would be easy to charge with any RC lipo charger. Handy things to have, charge your headlight, safely single cell charge an unbalanced cell in your traction pack, etc etc. There's the charging side of your bms, leaving you only needing a low voltage warning buzzer for the lights.

o damn i just realized my mistake there

i would need 3 or 4 3.2v 4.5ah cells to get 12v and 4.5ah

 

[Ypedal]

i suggest not getting that light at all and instead look into LED lights..

http://www.ypedal.com/Lumenator/Lumenator.htm

edit :| but 4 x lifepo4 cells in series is equal to 12v SLA, operating voltage ..

55 watts means they draw 4.5 amps at 12v, so a 5ah battery would run it for 1 hour.


headway cells are typically 8ah , 10..12..15 etc.. i am not aware of 2.3ah headways.... A123 cells however, or 26650 format cells hold 2.x ah

 

[SamTexas]

Why does it have to be LiFePo4? It's a 12V incandescent light, so it will run on anything from 1 to 15V. 3s LiCo (consumer LiCo of course) will do fine too.

 

[Eascen]

Or... why not run LED?

 

[dogman dan]

I think he has the lights already. 4s lifepo4, or 3s lico (lipo) will run them fine. Nothing wrong with the idea of a laptop cell pack for it.

Since I have the RC chargers, I'd be very inclined to run it on 3s 5 ah of RC hobby lipo.

 

[EbikeWizard]

Ypedal, i already have the light as dogman said
and i've never had an led light as bright as the car headlight im using now
Ypedal thanks for that info,
i know i've heard it before applied to motor kits (ah affecting range)
it helps to know that it applys to lights too
the higher the amp-hours, the longer the light will last
i want the battery pack to be smaller and lighter than the 12v 12ah SLA that im using now
i figure if i use a 12v 12ah Lifepo4 pack it would be lighter and smaller,
and last longer because it is Lifepo4
maybe it will last 3 hours, which is more than i need

 

[johnm]

Check out the rigid d2 led driving light 2600studded lumens at 28the watts and their bar mount. I have been using it for a year now after switching from 55 watt halogen. Great product

 

[Ypedal]

and i've never had an led light as bright as the car headlight im using now

they exist, and burn half the energy while doing it.

 

[SamTexas]

Not even half. At most 1/3.

But incandescent is still friendlier to on coming traffic.

 

[pendragon8000]

if you want brightness and LED it can be done:

I made this from 3watt led moduels in strings of 4 series x 2 running on 12v , it is as bright as a motor bike headlight and even during the day its a bit blinding to lok at. aprox 24watt
i would sugest going led but if you want to run your normal car/motor bike light you could use a dc-dc and run it from your main pack. btw a 240v plug pack can act as a dc-dc converter. thanks Sn0wchild for telling me about this.
[youtube]AybjjYk0gOA[/youtube]