Recent Topics
RV's for MD's
by 02SE - 04/07/20 01:42 AM
Crawfish, It's A Louisiana Thang!
by BlueOvalFitter - 04/07/20 01:01 AM
M&P .40 Magazines $12.99
by BlueOvalFitter - 04/06/20 11:30 PM
Lots of Big Sur pics, only one of the car :-)
by SLO_Town - 04/06/20 09:24 PM
'16 Pilot Inline ATF filter
by parshisa - 04/06/20 08:55 PM
2019 Ram 1500 Classic
by Skippy722 - 04/06/20 08:53 PM
STP S3614 XL CUT OPEN
by 53' Stude - 04/06/20 07:15 PM
Kia Rio awful sound after sitting 5 years
by antonmnster - 04/06/20 07:13 PM
Cut open Motorcraft FL820S
by PantherFan88 - 04/06/20 06:38 PM
240V Electric Hookup Questions
by 92saturnsl2 - 04/06/20 06:33 PM
license plate frame with 3rd brake light
by wings&wheels - 04/06/20 06:12 PM
Wurth HHS 2000
by ejt - 04/06/20 06:06 PM
Snapper drive belt install trouble LT300
by spk2000 - 04/06/20 05:56 PM
installing garage LED shop light help needed
by FirstNissan - 04/06/20 05:20 PM
Casite filters
by opus - 04/06/20 05:16 PM
Oil for Jeep
by rokwldr - 04/06/20 05:12 PM
Kitchen sink faucet leak help
by 97prizm - 04/06/20 04:45 PM
RIP Al Kaline.
by PimTac - 04/06/20 04:36 PM
Frankentruck power steering question
by Thomcat316 - 04/06/20 04:11 PM
Comment from Miata track on Amsoil GL-4
by Bill_W - 04/06/20 03:28 PM
Newest Members
BludRacing, Cacciatore, Thomcat316, NTexian, LateLifeCrisis
71116 Registered Users
Who's Online Now
32 registered members (dbias, blufeb95, Char Baby, 73guna, alcyon, 3 invisible), 1,129 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics303,700
Posts5,240,225
Members71,116
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 3 1 2 3
Battery charger recommendation #5383789 03/23/20 02:35 PM
Joined: Mar 2014
Posts: 4,590
L
Leo99 Offline OP
OP Offline
L
Joined: Mar 2014
Posts: 4,590
Got in the new Rav4 yesterday only heard weird clicks when I tried to start it. Battery read 7.5 volts across the terminals. Looks like the light in the cargo area was turned on and drained the battery. Pulled out my old Schumacher 10 amp charger and hooked it up. It's a low frills charger. Wife asked how long it takes to charge it. I just shrugged and guessed 2.5 hours. It started after 2.5 hours and we went for a hour long drive. The start/stop feature in the car will only work on a fully charged battery and it wouldn't work until we pulled into the driveway back home. Wife suggested we leave the charger on all night to be sure the battery was fully charged but I explained my charger will cook the battery. It's not smart. What are suggestions for a reasonably priced smart charger that will charge a battery in a few hours without cooking it?

This is a pic of my charger I found online.

148190_7345566.jpg

Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: Battery charger recommendation [Re: Leo99] #5383799 03/23/20 02:43 PM
Joined: Apr 2010
Posts: 4,447
A
atikovi Offline
Offline
A
Joined: Apr 2010
Posts: 4,447

Re: Battery charger recommendation [Re: Leo99] #5383800 03/23/20 02:46 PM
Joined: Sep 2015
Posts: 2,524
M
mk378 Offline
Offline
M
Joined: Sep 2015
Posts: 2,524
You can charge manually. Check voltage at the battery periodically with the charger still running. When the voltage reaches about 14.6, it is full, so turn it off. That is actually all that a basic automatic charger does.

Re: Battery charger recommendation [Re: Leo99] #5383804 03/23/20 02:50 PM
Joined: Jun 2015
Posts: 819
K
Kawiguy454 Offline
Offline
K
Joined: Jun 2015
Posts: 819
WallyWorld sells Shumacher smarter chargers. Youll pay more for more features. I bought a small CTEK smart charger that Jay Lenno uses and it has not failed me. It doesent charge at 15 amps but is fully automatic with different cell types and a rejuvenate mode.

https://www.amazon.com/dp/B000FRLO9Y/ref=psdc_15707061_t1_B07C8G3BKX

Last edited by Kawiguy454; 03/23/20 02:54 PM.
Re: Battery charger recommendation [Re: Leo99] #5383806 03/23/20 02:51 PM
Joined: Dec 2003
Posts: 1,316
W
wings&wheels Offline
Offline
W
Joined: Dec 2003
Posts: 1,316
I have two of the Schumacher 2/10/50, starting and deep cycle automatic smart chargers w/ battery condition indicators and I like them. They work well on the various auto/marine/aircraft, flooded and AGM, batteries, but both have had the clamp to cable connections fail after relatively little use. The clamps are crimped onto the copper strands and the jackets but the leads fail at the strands. Frustrating. I wound up crimping ring terminals to the leads and attaching them to the clamps.

I'd still recommend the higher end Schumachers, but, assuming the design hasn't been improved, I'd reattach the leads to the clamps preemptively.


'05 Lotus Elise S/C
'85 Land Rover 90 diesel
'74 Triumph TR6
'74 BMW 2002
'72 Land Rover Series III 88"
'99 Porsche 996 (Wife's)
'01 Porsche Boxster S (mostly Wife's...)
Piper Pa28-236


Re: Battery charger recommendation [Re: atikovi] #5383816 03/23/20 03:12 PM
Joined: Mar 2014
Posts: 4,590
L
Leo99 Offline OP
OP Offline
L
Joined: Mar 2014
Posts: 4,590
Originally Posted by atikovi


Thanks. Less than $100 is reasonable to me. Hope I never have to use it again. eek


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: Battery charger recommendation [Re: Leo99] #5383826 03/23/20 03:21 PM
Joined: Apr 2010
Posts: 4,447
A
atikovi Offline
Offline
A
Joined: Apr 2010
Posts: 4,447
Originally Posted by Leo99
Got in the new Rav4 yesterday only heard weird clicks when I tried to start it. Battery read 7.5 volts across the terminals. Looks like the light in the cargo area was turned on and drained the battery.


Most cars made the last 10-20 years have automatic battery drain cutoff that turns off the lights after 10-20 minutes.

Re: Battery charger recommendation [Re: Leo99] #5383830 03/23/20 03:23 PM
Joined: May 2005
Posts: 12,397
C
Char Baby Online Content
Online Content
C
Joined: May 2005
Posts: 12,397
I'd just buy a BatteryTender or any decent maintainer and this way you can connect it to your battery(permanently if you'd like) and leave it on all night if you want. And still hold on to your old Schumacher for completely dead batteries. Tenders/maintainers won't bring up a battery that is run down too low the way your Schumacher charger will.


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Battery charger recommendation [Re: atikovi] #5383836 03/23/20 03:29 PM
Joined: Mar 2014
Posts: 4,590
L
Leo99 Offline OP
OP Offline
L
Joined: Mar 2014
Posts: 4,590
Originally Posted by atikovi
Originally Posted by Leo99
Got in the new Rav4 yesterday only heard weird clicks when I tried to start it. Battery read 7.5 volts across the terminals. Looks like the light in the cargo area was turned on and drained the battery.


Most cars made the last 10-20 years have automatic battery drain cutoff that turns off the lights after 10-20 minutes.


That's what I thought. I put in aftermarket LED bulbs in the cargo area and cabin. The stock bulbs are way too dim. Maybe that prevented the cutoff?


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: Battery charger recommendation [Re: Leo99] #5383848 03/23/20 03:38 PM
Joined: Nov 2006
Posts: 23,197
T
Trav Offline
Offline
T
Joined: Nov 2006
Posts: 23,197


ASE L1, Master. Deutsch Meisterbrief.
Re: Battery charger recommendation [Re: Kawiguy454] #5383852 03/23/20 03:40 PM
Joined: Nov 2012
Posts: 988
P
Pelican Offline
Offline
P
Joined: Nov 2012
Posts: 988
Originally Posted by Kawiguy454
WallyWorld sells Shumacher smarter chargers. Youll pay more for more features. I bought a small CTEK smart charger that Jay Lenno uses and it has not failed me. It doesent charge at 15 amps but is fully automatic with different cell types and a rejuvenate mode.

https://www.amazon.com/dp/B000FRLO9Y/ref=psdc_15707061_t1_B07C8G3BKX


Great little charger, I have a similar one same make and great built quality!

Re: Battery charger recommendation [Re: Char Baby] #5383865 03/23/20 03:50 PM
Joined: Dec 2019
Posts: 93
W
whatnext Offline
Offline
W
Joined: Dec 2019
Posts: 93
Originally Posted by atikovi
Originally Posted by Leo99
Got in the new Rav4 yesterday only heard weird clicks when I tried to start it. Battery read 7.5 volts across the terminals. Looks like the light in the cargo area was turned on and drained the battery.


Most cars made the last 10-20 years have automatic battery drain cutoff that turns off the lights after 10-20 minutes.


My '12 Mazda3 will drain the battery if parked for more than a week. The dealer said this is normal ([censored]). I travel a lot and can be away for a month or more. My Schumacher has a 110 amp starter mode, 15 amp fast charge, and a 2 amp trickle mode. But it is so old that I don't think it is smart enough to power down after the battery charge is full and the loud hum it makes has me convinced that it is sucking a lot of juice all the time. So...

Originally Posted by Char Baby
I'd just buy a BatteryTender or any decent maintainer and this way you can connect it to your battery(permanently if you'd like) and leave it on all night if you want. And still hold on to your old Schumacher for completely dead batteries. Tenders/maintainers won't bring up a battery that is run down too low the way your Schumacher charger will.


This ^^. So I got a Schumacher trickle charger and it lasted ~6 years. The replacement Stanley 1 amp crapped out in 1 year. Now using a BatteryTender Junior. Will see how long it lasts.

Re: Battery charger recommendation [Re: whatnext] #5383871 03/23/20 03:58 PM
Joined: Dec 2005
Posts: 13,892
K
kschachn Offline
Offline
K
Joined: Dec 2005
Posts: 13,892
Originally Posted by whatnext
My '12 Mazda3 will drain the battery if parked for more than a week. The dealer said this is normal ([censored]). I travel a lot and can be away for a month or more. My Schumacher has a 110 amp starter mode, 15 amp fast charge, and a 2 amp trickle mode. But it is so old that I don't think it is smart enough to power down after the battery charge is full and the loud hum it makes has me convinced that it is sucking a lot of juice all the time. So...

The FSM for your Mazda will specify a quiescent current draw for the vehicle. It is an easy test to determine if the vehicle has a parasitic draw above that limit.

My old BMW has a series of step-down values that decrease immediately after shutdown. IIRC the final value after four minutes or so is less than 20mA. The only reason I know this is because it had a diode failure in the alternator which caused a 800mA continuous draw.

There's no way any vehicle should drain a battery in a week unless there is either something wrong with the vehicle or with the battery.


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
Re: Battery charger recommendation [Re: kschachn] #5383880 03/23/20 04:15 PM
Joined: Dec 2019
Posts: 93
W
whatnext Offline
Offline
W
Joined: Dec 2019
Posts: 93
Originally Posted by kschachn
The FSM for your Mazda will specify a quiescent current draw for the vehicle. It is an easy test to determine if the vehicle has a parasitic draw above that limit.

My old BMW has a series of step-down values that decrease immediately after shutdown. IIRC the final value after four minutes or so is less than 20mA. The only reason I know this is because it had a diode failure in the alternator which caused a 800mA continuous draw.

There's no way any vehicle should drain a battery in a week unless there is either something wrong with the vehicle or with the battery.


Thanks - FYI the battery dies between 1 and 2 weeks. The dealer said this is normal and didn't even suggest bringing it in. So I wasn't going to chase down the current draw. If I found it I doubt the dealer would lift a finger. So I just went with the trickle charging and has been my routine for 8 years. BTW - its still the original battery from 2012 but I am pushing my luck and will replace it before next winter. Also my other 2 vehicles can sit for more than a month and start fine.

Re: Battery charger recommendation [Re: Leo99] #5383883 03/23/20 04:18 PM
Joined: Feb 2009
Posts: 2,372
K
krismoriah72 Offline
Offline
K
Joined: Feb 2009
Posts: 2,372
I have two schumacher chargers, one small and one big... they both stay in the garage... I always go for my Silver Beauty.. its loud and makes a buzzing noise but its a workhorse. If i find another at a yardsale im buying.

[Linked Image from antiquesnavigator.com]

Page 1 of 3 1 2 3
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™