12 volt engine starter to power a lipo charger - RC-Monster Forums

notatoy · **12 volt engine starter to power a lipo charger -** 11.01.2009, 06:25 PM

hi guys not sure if any one has done this before so hear goes , lets say i am out in the field with my electric r/c and need to run my lipo charger but dont have a car batterie to run off so what about a alternative light weight and portable and cheap like this . http://www.amazon.co.uk/Blackspur-En.../dp/B000FTDYEK will it work or no chance ??? thanks in advance

wallot · 11.01.2009, 06:30 PM

it still has a car battery inside :) just get a standard high capacity car battery as who knows whats inside this.

junkman · 11.01.2009, 06:32 PM

I have a jump box pretty much just like that, have used it a few times to run a charger, works just fine.

notatoy · 06:43 PM

Quote:

Originally Posted by wallot

it still has a car battery inside :) just get a standard high capacity car battery as who knows whats inside this.

i understand but i have no transport and dont whant to lug around a heavy 12 volt car batterie when i go out if you get my point .

notatoy · 11.01.2009, 06:42 PM

Quote:

Originally Posted by junkman

I have a jump box pretty much just like that, have used it a few times to run a charger, works just fine.

thanks so do you think it will work even if i just get a couple of packs out of it that would be fine . ??

shaunjohnson · 11.01.2009, 06:45 PM

like EVERYONE at the local track uses them to charge stuff.

but here's a tip..
go to the local tip (called the dump over there?) and find the used battery pile.
pick out all the blue batts, the marine ones because they are changed out anualy.
now take out your multimeter and look for anything above 12.6v
if you find one showing that or above that value, either "liberate" it or give the tip guys a few $$ to take it off their hands.
and wu-la, new field battery.

we did this and now have 2 marine grade starting batteries to power field equiptment, they also come in handy to start ye' ol' tractor from time to time. (cant beat 500 CCA)

notatoy · 11.01.2009, 06:50 PM

Quote:

Originally Posted by shaunjohnson

like EVERYONE at the local track uses them to charge stuff.

but here's a tip..
go to the local tip (called the dump over there?) and find the used battery pile.
pick out all the blue batts, the marine ones because they are changed out anualy.
now take out your multimeter and look for anything above 12.6v
if you find one showing that or above that value, either "liberate" it or give the tip guys a few $$ to take it off their hands.
and wu-la, new field battery.

we did this and now have 2 marine grade starting batteries to power field equiptment, they also come in handy to start ye' ol' tractor from time to time. (cant beat 500 CCA)

thanks for your help but think i would rather buy new , the recycling laws are different here in the u,k and dought i could purchase those from the local tip . your help is appreciated if could just purchase this thing and get a couple of hours out of it that would be great ??

shaunjohnson · 11.01.2009, 06:52 PM

well i happen to know that them starter packs only have a couple of SLA batteries.
the cables comming out of it are simply for show only as the internal batteries are NEVER going to have enough juice to make use of the cables.
go to a battery shop, get yourself either a 20AH gell cell/SLA, car battery or 2-3 of the common 7AH 12v gell cells and wire in parallel.

notatoy · 11.01.2009, 06:54 PM

Quote:

Originally Posted by shaunjohnson

well i happen to know that them starter packs only have a couple of SLA batteries.
the cables comming out of it are simply for show only as the internal batteries are NEVER going to have enough juice to make use of the cables.
go to a battery shop, get yourself either a 20AH gell cell/SLA, car battery or 2-3 of the common 7AH 12v gell cells and wire in parallel.

i understand great idea . never thought of that .lol.. thank you .

zeropointbug · 11.01.2009, 08:56 PM

http://www.optimabatteries.com/optim...wtop/index.php

Get one of those and you will be set for 15+ years

E-Revonut · 11.01.2009, 10:15 PM

If a car battery is to heavy then how about something like a riding lawn mower battery? Here in the US they can be purchased for $30-40 and they are about 1/2 the size of a car battery. Way more capacity than what's in a jump box and it's not much heavier than a jump box with all the extra crap they put on them things.