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› How long will a 12V car battery last charging 6c 5000ma batteries?
04-27-2010 03:47 PM  8 years agoPost 1
Metalizer

rrApprentice

Canton, Ohio

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OK Im new to electric flight with these big batteries. There is a tun of chargers on the market but hardly none on AC input

So if i buy a new car battery and go with a 300watt charger how many charges will i get out of it?

Would a marine battery be a better choise since i understand there better at recharging?

Could u have a 12v car charger at 2,10 to 50 amps on the car battery while using the dc charger at the same time?

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04-27-2010 03:50 PM  8 years agoPost 2
Wingman77

rrProfessor

Pulaski Tennessee

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you would definitely need a deep cycle marine battery because you will ruin a car battery really quick, and even with a deep cycle you will only get about 6-7 charges before it dies.
Could u have a 12v car charger at 2,10 to 50 amps on the car battery while using the dc charger at the same time?
set the charger to 10 amps and leave it on the battery and you are good to go, DON'T CONNECT YOUR CHARGER DIRECTLY TO THE DEEP CYCLE CHARGER as that will leave you with some fried stuff...

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04-27-2010 04:25 PM  8 years agoPost 3
psych-lick

rrKey Veteran

Portland, OR

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WalMart has a 125 amp hr. marine deep cycle battery for around $80. Never discharge a marine battery below 80% capacity. This should give you about 7+ charges at the field.

A car battery is designed to give high current, but little capacity. You can expect maybe 2 charges of a 6S 5000 pack before voltage drop (and damage to the car battery).

-Jeff T.

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04-27-2010 04:40 PM  8 years agoPost 4
iHover

rrVeteran

Berne , NY

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Harbo frieght has a two cycle 800 watt generator that you can get with AMA discount for around $90. I got one a couple of weeks ago and had it at my field Sunday. It ran 6hrs. on a tank of gas and was charging two of my 6s 3000s at 2C and one of my buddys 6s 5000's.

You had me at Hover

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04-27-2010 05:14 PM  8 years agoPost 5
Wingman77

rrProfessor

Pulaski Tennessee

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that looks nice for the money, is it really loud though?

http://www.harborfreight.com/cpi/ct...temnumber=66619

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04-27-2010 05:23 PM  8 years agoPost 6
TJinGuy

rrProfessor

Socorro, NM - USA

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You initially said you wished the bigger chargers were accepted AC. Then why not just buy a power supply and forget the battery. Batteries are a bad choice for packs that large for 2 reasons. One is that they have limited capacity and the other is the low voltage. Powerful chargers need upwards of 24V to give full output and you are going to need quite a bit of output to charge 6s 5000 packs.

- Chris

Team New Mexico
TJinTech

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04-29-2010 04:10 AM  8 years agoPost 7
dxflyer

rrApprentice

Bay area, California

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I have been successful using two old car batteries that I owned to make a 24v powersource for my charger. Eventually when I have more funds I will buy 2 marine battery with 115 amp hours.

Right now with the 2 old car batteries I fully charge them the night before. I can charge my 2 6s 3000mah at 12 amps. I have done at least 10 cycles at the field. I am using about 50 amps with the 10 cycles. I'm limited 300 watt because of my charger. I'm thinking of buying another icharger 206b to be able to charge at 600 watt.

I was thinking of the generator however since I had these batteries lying around I did that instead. It works great so far. I know with the deep cycle marine I can get more out of. Think of having 230 amps x .8 so about 184 amps hour available. Should be more than enough for all day flying. If one cycle for me is about 4.8 amps then roughly 184/4.8 = 38 cycles. I fly for about 7 minutes per cycle 266 minutes of flying time. All these numbers are approximate..

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04-29-2010 03:18 PM  8 years agoPost 8
kcordell

rrElite Veteran

O Fallon, MO

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The Harbour Freight generator is a little louder than the Honda (okay, quite a bit louder). That's what extension cords are for. Put it out in front of your vehicle and charge away. The vehicle will keep the noise down. The Honda is nice but an extension cord is much cheaper than the extra $$$ for the Honda to be sitting next to you in the pits.

Team Synergy/Rail, Team Scorpion, YS Engines, VelTye

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04-29-2010 05:36 PM  8 years agoPost 9
iHover

rrVeteran

Berne , NY

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I use a 50 ft cord and from that distance the generator is bearly heard. So far its working out great.

You had me at Hover

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05-03-2010 04:11 PM  8 years agoPost 10
Metalizer

rrApprentice

Canton, Ohio

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Im not sure the generator is the way to go for me.
Im not sure it would go over to well at the club. Even at 50 feet away it would be annoying for some.

For the price of a cheap generator and two 350watt converters you could have 4 new batteries. Well almost.

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05-03-2010 04:29 PM  8 years agoPost 11
iHover

rrVeteran

Berne , NY

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Thats why they make 100 ft extension cords Its not that loud. If you you runn a 100 ft ension and so9me complains they are just trying to be an ass

You had me at Hover

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05-03-2010 07:43 PM  8 years agoPost 12
Hoverpitch

rrNovice

Alhambra, CA USA

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Metalizer,

Check this out it may help you in your findings.

http://www.vat19.com/dvds/power-dom...fm?adid=youtube

Hoverpitch

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05-03-2010 07:52 PM  8 years agoPost 13
dxflyer

rrApprentice

Bay area, California

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My setup in the back of my van
12 Amps charging and parallel charging.

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05-03-2010 08:38 PM  8 years agoPost 14
Justin Stuart (RIP)

rrMaster

Plano, Texas

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dxflyer, what kind of leads are that on your batteries?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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05-03-2010 08:48 PM  8 years agoPost 15
dxflyer

rrApprentice

Bay area, California

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XT60: I like them..

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05-03-2010 10:04 PM  8 years agoPost 16
Jag72

rrProfessor

South of Boston

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DXFLYER
That's a pretty bad ass setup...I like it

how'd you figure out how to do the parallel charging wiring?

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05-03-2010 10:43 PM  8 years agoPost 17
dxflyer

rrApprentice

Bay area, California

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From members of RR. Tjintech also; read his website and seen a lot of posting in RR. I was scared to try parallel charging at first buy 5 months now; things are good; people who are new to parallel please, please read up on it before doing it. I have save a lot time charging batteries. My trex 600 is 12S and my soon to be logo 600 is going to be 12s as well. I'm about to buy another charger so I can charge 4 6s at once or I'm waiting for the 1000 watt chargers...

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05-03-2010 10:49 PM  8 years agoPost 18
Wingman77

rrProfessor

Pulaski Tennessee

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parallel charging is super easy and safe,it is a great way to take advantage of higher power chargers.

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05-03-2010 11:04 PM  8 years agoPost 19
JEEPWORLD2002

rrKey Veteran

BLUEBELL PA USA

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my only problem with parrell charging is the balancers are limited to a 200mah drain. so lets say were pumping a constant current of 10amps into a 6s 5000. so well say 2amps per cell, How could the balancer do any thing to prevent a overcurrent or over voltage problem only being able to drain off so much ?? then double the battery and the balancer become half efficent right ?? i am not a electronics wiz, but it seems very dangerious

Trex600n Trex500 Mikado LoGo5003d// Hacker, CastleCreations,Ys 50, JR 7703d/8900, Radix

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05-03-2010 11:08 PM  8 years agoPost 20
dxflyer

rrApprentice

Bay area, California

My Posts: All  Forum  Topic

On my charger; when the voltage is getting close to 4.2v per cell the charger amp charge starts to drop tremendously. If I start charging 12 amps then usually when its close to the 4.2 then charging is about 2 amps then 1 amps then .8 amps...and so on.

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