Recent Topics
EPA to ban race cars?
by Kruse
16 minutes 20 seconds ago
Kluber Isoflex LDS18 Special A
by Phishin
22 minutes 41 seconds ago
Taurus question
by Lubener
Today at 04:36 AM
Lucas Extreme Duty CLP?
by Ws6
Today at 04:19 AM
Pennzoil Ultra 5w20 / 7500mi / '08 Ford Fusion 3.0
by sdude2k2000
Today at 12:59 AM
Hairline Cracks in Radiator
by Merkava_4
Today at 12:05 AM
Super Tech Syn 5/30
by RevRider
Yesterday at 11:31 PM
Installing a dish washer.
by ram_man
Yesterday at 10:37 PM
Strangest Three Wheel Car Ever
by Fsharp
Yesterday at 09:57 PM
Remove Gasoilne and other Blowby Gasses
by landtoy80
Yesterday at 09:48 PM
Trans Am said goodbye to his battery today.
by ls1mike
Yesterday at 09:39 PM
Lil Big Rig - I want one
by montero1
Yesterday at 09:01 PM
Newest Members
robco, TrogDorInjection, wytenow, maxud, OrchardAuto
56875 Registered Users
Who's Online
73 registered (aircooled, B767capt, Al, Atesz792, beanoil, 04SE, 5 invisible), 779 Guests and 206 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
56875 Members
66 Forums
244482 Topics
3981541 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3228211 - 12/26/13 11:48 AM Battery Charger QUESTION?
Norm Olt Offline


Registered: 01/27/03
Posts: 1829
Loc: Pac NW
The meter on my 10amp (Schumacher) charger is out: when charger's clips are connected to a 12 volt battery that's a little low, what should the voltage reading be between the two battery terminals?

I don't think I can read actual amps output with the test device I have without opening up the charger itself, but the voltage reading I'm now getting hooked up as above is about 16 volts. Needless to say I don't have the battery cables hooked up.

Does it appear I'm actually charging the battery to you guys?

Thanks in advance!
_________________________
14Outback 10K
01ValkyrieIS 6K
93ZX11D 30K
87F250 185K
88420SEL 178K
88420SEL 212K (parts)
91420SEL 235K
92SVX 182K
00Nighthawk250 1.5K
93SC400 105K
85F150 104K

Top
#3228217 - 12/26/13 11:53 AM Re: Battery Charger QUESTION? [Re: Norm Olt]
Eddie Online   happy


Registered: 12/07/03
Posts: 7839
Loc: Florida, Cape Coral
Yes, you should be charging.
_________________________
CX5 Touring 2.5L :-)

Top
#3228221 - 12/26/13 11:59 AM Re: Battery Charger QUESTION? [Re: Norm Olt]
bullwinkle Online   confused


Registered: 10/09/04
Posts: 5306
Loc: Cincinnati, OH, USA
Normal fully charged battery is 12.6, so anything above that is charging. 16 VDC is a little on the high side, I wouldn't leave that hooked up for more than 24 hours, preferably less, check your electrolyte (water) level when you're done.
_________________________
06 Ram 3500 CTD 4X4 48RE SRW, 93 GMC C3500 6.2 diesel, 89 F-450 7.3 IDI, 98 Cherokee 4.0, 05 Scion xB, 15 Transit 250 3.7

Top
#3228229 - 12/26/13 12:09 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
Norm Olt Offline


Registered: 01/27/03
Posts: 1829
Loc: Pac NW
Thanks (again) for the most prompt replies! I'll keep a close watch, but once the battery consistantly reads 12.6 volts I'll hook up my battery cables and give it a go. Probably oldest battery I have (age unknown) and the F150 sits outside. It has been pretty cold around here all December, so a low battery is not to be really unexpected. I usually go out and start it and dive around at least once a week.

I'm almost ready to open this charger up and see if it is just a loose connection to the ampmeter internally, but as long as it is charging I'm happy. This is my spare charger (and the one @ the Beach) and I have plenty of Battery Tenders for maintenance.

Cheers!
_________________________
14Outback 10K
01ValkyrieIS 6K
93ZX11D 30K
87F250 185K
88420SEL 178K
88420SEL 212K (parts)
91420SEL 235K
92SVX 182K
00Nighthawk250 1.5K
93SC400 105K
85F150 104K

Top
#3228234 - 12/26/13 12:17 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
Rand Offline


Registered: 08/20/03
Posts: 9798
Loc: NE,Ohio
fully charged battery fresh off the charger will usually read about 13.2-13.3

after sitting for half an hour usually 12.6~~

thats a regular charger not "float/tender"
_________________________
2015 Forester I-Premium 6MT

Top
#3228290 - 12/26/13 12:53 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
Donald Online   content


Registered: 03/21/04
Posts: 16070
Loc: Upstate NY
Is the meter analog or digital? I would suspect the charger would fail before the meter if its analog unless you dropped the charger.

Leave the charger on overnight and see how it is in the morning. Voltage is not a great way to test a battery unless you wait 24 hours for the surface charge to go away and have a high quality meter.

A carbon pile load test or conductive test are better and can be done immediately after charging. The conductive can be done with a battery even if its not fully charged.

Some of the fancy Schumnacher "speed chargers" go through a couple of phases of battery charging so the voltage may change as the phases change.


Edited by Donald (12/26/13 12:54 PM)
_________________________
2015 Subaru Forester 2.5 engine/CVT PP & M1
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1


Top
#3228320 - 12/26/13 01:29 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
dernp Offline


Registered: 10/18/12
Posts: 504
Loc: S/W Ontario, Estero, Fla.
I bought a Schumacher SC1200A for about $35 on Amazon. Pretty good price I thought for a micro processor controlled charger. May not be worth fixing a broken one.
_________________________
2014 Honda Civic 1.8 28k TGMO 0w20
2013 Honda CR-V 2.4 AWD 48k TGMO 0w20
2012 Elantra 61k PPPP 5w20
2011 Tundra 5.7L 48K PP 5w20



Top
#3228463 - 12/26/13 04:19 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
Chris142 Offline


Registered: 06/05/03
Posts: 13492
Loc: apple valley, ca
Put a volt meter on the battery to see what the actual voltage is
_________________________
02 Wrangler super-s 10w30
87 F250 delo 15w40
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric delo 5w40

Top
#3228483 - 12/26/13 04:50 PM Re: Battery Charger QUESTION? [Re: Norm Olt]
Dufus2 Offline


Registered: 12/12/13
Posts: 250
Loc: Virginia
My 6A/2A charger from walmart is a SE-82-6 re-branded to WM-82-6 and has an amp meter. It can read zero if the battery is totally dead. It normally reads in the 2-3 amp range once the battery is up in a good state of charge. If it hums when connected, its working.

A battery charger can put out 18V and boil a battery if its left on for a long time. Anything above 13V will charge the battery unless it is bad with a surface charge or sulfated.
_________________________
ASE Certified in Med/Heavy Truck Service including A9
Heavy Equipment Repair, Fleet Maintenance
Real Cars Rattle and Smoke a Little

Top
#3231811 - 12/30/13 11:39 AM Re: Battery Charger QUESTION? [Re: Norm Olt]
Norm Olt Offline


Registered: 01/27/03
Posts: 1829
Loc: Pac NW
My old Schumacher is an old analog 12v-6v 2/6amp and works great. The one at the Beach came from my neighbor and it has a three-way selector for "Manual", "Maintenance-Free Automatic" and "Deep Cycle": this is the one with the ampmeter question.

Thanks, again to all! & CHEERS!

p.s. The battery fully charged in about 12 hours on manual, good voltage reading the following morning. BatteryTender Jr. then ran for 10 seconds and read "green" (NOT RED, GREEN ).

Then I got serious and rebuilt/cleaned the cable attachments, including baking soda soaks and stripping away the paint (!) on the terminal attachments. Why new ones would have much of the surfaces covered with red/black enamel is way beyound me.
_________________________
14Outback 10K
01ValkyrieIS 6K
93ZX11D 30K
87F250 185K
88420SEL 178K
88420SEL 212K (parts)
91420SEL 235K
92SVX 182K
00Nighthawk250 1.5K
93SC400 105K
85F150 104K

Top