BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   7Post - 7 Series Forum > BIMMERPOST Universal Forums > General Automotive (non-BMW) Talk + Photos/Videos

Post Reply
 
Thread Tools Search this Thread
      11-20-2023, 12:29 PM   #1
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

Stupid office worker question re. car batteries

I am googling this and getting so much conflicting advice i thought i'd hit up the knowledgeable folk here.

What tool/device should I be looking at that can charge my car's battery if it dies? I am talking I wake up, car has a mystery power draw we cannot trace, car is dead to the world and i need to properly recharge the battery. So not just a boost but a proper charge.

Thanks in advance egg heads.
Appreciate 0
      11-20-2023, 12:33 PM   #2
TheMidnightNarwhal
Major General
TheMidnightNarwhal's Avatar
Canada
2536
Rep
6,179
Posts

Drives: 11' 335is DCT
Join Date: Jun 2015
Location: Gatineau, Quebec

iTrader: (0)

A battery charger.
Appreciate 2
RM72807.50
nicholasn261.00
      11-20-2023, 01:19 PM   #3
chassis
Colonel
chassis's Avatar
6207
Rep
2,254
Posts

Drives: 9Y0 Cayenne S
Join Date: Mar 2019
Location: Einbahnstraße

iTrader: (0)

Garage List
Take the battery out of the car and charge it with the cheapest charger you can buy at Canadian Tire.
Appreciate 1
xander_g928.00
      11-20-2023, 02:14 PM   #4
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

But what am I looking at? So many products look and sound the same but the price varies WILDLY.

So the NOCO genius 10 and 2 models, they seem to be the same thing but one is 10 amp and one is 2 amp. Is the only difference the speed in which it will recharge the battery?

https://www.canadiantire.ca/en/pdp/n...4.html?loc=plp

https://www.canadiantire.ca/en/pdp/n...2.html?loc=plp
Appreciate 0
      11-20-2023, 02:28 PM   #5
dreamingat30fps
Lieutenant Colonel
United_States
5149
Rep
1,901
Posts

Drives: Miata, Cayenne, Model 3, F350
Join Date: Jan 2010
Location: South Florida & NC

iTrader: (1)

Those are fancy with different mode like for lithium batteries.

If you don't have a lithium battery you don't need that. Just a regular cheap battery tender. Assuming the battery isn't shot it will eventually charge it up. They also have one that are jump starters, you don't need that either.

Something like this is all you should need to charge a 12v lead acid battery.

https://www.canadiantire.ca/en/pdp/m...1_rr&rrec=true
Appreciate 0
      11-20-2023, 02:31 PM   #6
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

I think it has the fancy new battery in it... aDR or something... ADm ... fuck I can't remember.
Appreciate 0
      11-20-2023, 02:34 PM   #7
dreamingat30fps
Lieutenant Colonel
United_States
5149
Rep
1,901
Posts

Drives: Miata, Cayenne, Model 3, F350
Join Date: Jan 2010
Location: South Florida & NC

iTrader: (1)

Quote:
Originally Posted by Alfisti View Post
I think it has the fancy new battery in it... aDR or something... ADm ... fuck I can't remember.
AGM... still not lithium so the regular trickle charger should work.
Appreciate 0
      11-20-2023, 02:38 PM   #8
TheMidnightNarwhal
Major General
TheMidnightNarwhal's Avatar
Canada
2536
Rep
6,179
Posts

Drives: 11' 335is DCT
Join Date: Jun 2015
Location: Gatineau, Quebec

iTrader: (0)

Quote:
Originally Posted by Alfisti View Post
But what am I looking at? So many products look and sound the same but the price varies WILDLY.

So the NOCO genius 10 and 2 models, they seem to be the same thing but one is 10 amp and one is 2 amp. Is the only difference the speed in which it will recharge the battery?

https://www.canadiantire.ca/en/pdp/n...4.html?loc=plp

https://www.canadiantire.ca/en/pdp/n...2.html?loc=plp
Both of those are the same battery chargers. Modern battery chargers also maintain and all that. The difference in those is just the amp charging per hour, the higher the faster it charges. You can also swap charging modes between AGM and typical acid batteries usually.

For example I myself use a Motomaster eliminator 7amp charger. Between those 2 you listed I would get the 10amp.
Appreciate 0
      11-20-2023, 03:21 PM   #9
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

Quote:
Originally Posted by dreamingat30fps View Post
AGM... still not lithium so the regular trickle charger should work.
Quote:
Originally Posted by TheMidnightNarwhal View Post
Both of those are the same battery chargers. Modern battery chargers also maintain and all that. The difference in those is just the amp charging per hour, the higher the faster it charges. You can also swap charging modes between AGM and typical acid batteries usually.

For example I myself use a Motomaster eliminator 7amp charger. Between those 2 you listed I would get the 10amp.
Thanks champions.
Appreciate 0
      11-20-2023, 04:34 PM   #10
ptpending
Colonel
ptpending's Avatar
444
Rep
2,734
Posts

Drives: e91
Join Date: Dec 2013
Location: Poland

iTrader: (1)

The best option is CTEK MXS 10 with temperature sensor, it will compute voltage needed according ambient temp around battery or car
I owning it for 5 years, but not used sensor before
this autumn i began to use sensor and charged two agm batteries up to 12.76
i think this is very good result
__________________
E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
Appreciate 2
M5Rick57338.00
      11-20-2023, 04:47 PM   #11
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

I do have a CTEK tender for my summer car that is winter stored. Does a great job.
Appreciate 0
      11-20-2023, 07:07 PM   #12
Tambohamilton
Brigadier General
3018
Rep
3,867
Posts

Drives: E91 330d
Join Date: Apr 2019
Location: Herefordshire

iTrader: (0)

I have a ctek mxs5. Works well; never any issues. Have tried cheap chargers in the past, but had various minor issues. 5a charge rate is pretty slow, though!
Appreciate 0
      11-20-2023, 08:50 PM   #13
Bc2005
First Lieutenant
United_States
307
Rep
387
Posts

Drives: 2021 M340i
Join Date: Jun 2021
Location: Virginia

iTrader: (0)

Apparently some of the newer chargers also have a voltage sensor that prevents charging the battery if it’s below a certain voltage when the charger is connected. AFAIK, the logic is that if the voltage is really low (say 6 volts) there may be a dead cell or physical damage, so it need more than a simple charge. However, I assume there is also probably a way to bypass that “feature”.
Appreciate 0
      11-21-2023, 06:00 AM   #14
ptpending
Colonel
ptpending's Avatar
444
Rep
2,734
Posts

Drives: e91
Join Date: Dec 2013
Location: Poland

iTrader: (1)

well, i found that ctek mxs 10 model is not available in US market, only mxs 5 and
CTEK MULTI US 7002 and then goes mxs25 pro charger
but mxs 5 has in-build temp sensor, so should good too
__________________
E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
Appreciate 0
      11-21-2023, 08:52 AM   #15
Jolbex
Private First Class
36
Rep
144
Posts

Drives: X3
Join Date: May 2023
Location: Europe

iTrader: (0)

Quote:
Originally Posted by Bc2005 View Post
Apparently some of the newer chargers also have a voltage sensor that prevents charging the battery if it’s below a certain voltage when the charger is connected. AFAIK, the logic is that if the voltage is really low (say 6 volts) there may be a dead cell or physical damage, so it need more than a simple charge. However, I assume there is also probably a way to bypass that “feature”.
Try connecting any 12v batt in parallel for a few seconds...just enough for charger to sense voltage and start charging. We normally use some small batterytool aku for this
Appreciate 0
      11-21-2023, 09:11 AM   #16
unluky
Major
unluky's Avatar
7439
Rep
1,242
Posts

Drives: 04 z4 3.0 Sport & 15 X5 35i XD
Join Date: Aug 2013
Location: Sedalia, MO

iTrader: (0)

Garage List
100% - get a jump box. Something that plugs in can only help you when you are near an outlet. A jump box can help you no matter where you are. You can connect them and then plug them in to use them as a trickle charger or use them stand alone in the middle of no where.

They also double as back up power to charge phones and tablets when you have a power outage or emergency or just camping.
__________________
2015 X5 XDrive 35i - 2004 Z4 3.0 Sport
Appreciate 0
      11-21-2023, 10:29 AM   #17
TheMidnightNarwhal
Major General
TheMidnightNarwhal's Avatar
Canada
2536
Rep
6,179
Posts

Drives: 11' 335is DCT
Join Date: Jun 2015
Location: Gatineau, Quebec

iTrader: (0)

Quote:
Originally Posted by unluky View Post
100% - get a jump box. Something that plugs in can only help you when you are near an outlet. A jump box can help you no matter where you are. You can connect them and then plug them in to use them as a trickle charger or use them stand alone in the middle of no where.

They also double as back up power to charge phones and tablets when you have a power outage or emergency or just camping.
Unless you specifically have a jumpbox designed to be both a battery charger and jumper, they are 2 distinct products for different needs/features. OP clearly needs/asks about a battery charger.
Appreciate 0
      11-21-2023, 10:39 AM   #18
M5Rick
General
M5Rick's Avatar
57338
Rep
18,771
Posts

Drives: M5 F10 DCT Gunmetal
Join Date: Aug 2018
Location: Southern England

iTrader: (0)

Got my Ctek MXS-5 on right now on AGM setting, I prefer gradual slow and easy charge rather than the 10 model.
Appreciate 1
      11-21-2023, 11:08 AM   #19
dreamingat30fps
Lieutenant Colonel
United_States
5149
Rep
1,901
Posts

Drives: Miata, Cayenne, Model 3, F350
Join Date: Jan 2010
Location: South Florida & NC

iTrader: (1)

Ya'll have probably confused the guy more than he was before.
Appreciate 1
lakefront551.50
      11-21-2023, 12:52 PM   #20
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

Quote:
Originally Posted by dreamingat30fps View Post
Ya'll have probably confused the guy more than he was before.
LOL no but I hope it's clear now why I asked the question, as dumb as it first seemed.

So the booster idea is interesting, in theory i could get the car going and all is good but the wife's commute is short so I think a boost runs the risk of of the car then dying on her at work. Worse case she takes my car and i charge the car as I WFH. I will sniff about for a 10AMP charger, 5 seems too slow and anything more than 10 seems brave.

We just bought the car today, the residual is about $7K below market price but she absolutely loves the car and mechanically it has been fine, we just cannot get on top of this power draw issue, it has died overnight 3 times in 4 years.
Appreciate 0
      11-21-2023, 03:44 PM   #21
TheMidnightNarwhal
Major General
TheMidnightNarwhal's Avatar
Canada
2536
Rep
6,179
Posts

Drives: 11' 335is DCT
Join Date: Jun 2015
Location: Gatineau, Quebec

iTrader: (0)

Quote:
Originally Posted by Alfisti View Post
LOL no but I hope it's clear now why I asked the question, as dumb as it first seemed.

So the booster idea is interesting, in theory i could get the car going and all is good but the wife's commute is short so I think a boost runs the risk of of the car then dying on her at work. Worse case she takes my car and i charge the car as I WFH. I will sniff about for a 10AMP charger, 5 seems too slow and anything more than 10 seems brave.

We just bought the car today, the residual is about $7K below market price but she absolutely loves the car and mechanically it has been fine, we just cannot get on top of this power draw issue, it has died overnight 3 times in 4 years.
Haha yeah don't worry I also spent an afternoon to learn about them and search and see what I needed to buy when I first looked at them.

Yeah a booster is more so you can get the car going if it's fully dead and then it has to charge on it's own as it runs. If instead you want to make sure the battery is full juice the day you want to take the car, or charge low/dead battery, a smart battery charger is what you want. I don't think 2 in 1 jump pack and chargers exists. (EDIT: Actually looks like you can buy battery chargers that also have a jump start feature, but no the other way around (you need to plug it in an outlet))

Although that's not to say you shouldn't have a jump pack either, I have my jump pack in my trunk and my charger at home. I use the charger almost daily and like to charge my car up in the evening because I also have some kind of power draw issue, although I think it's just my dashcam set up, I never had my battery go full flat since I almost use it daily but I have gotten the low battery warning some times but if it happens while I'm not at home, well I can at least start the car.
Appreciate 1
Alfisti6406.00
      11-21-2023, 06:31 PM   #22
Alfisti
Colonel
6406
Rep
2,990
Posts

Drives: 2008 Saab 9-3 Combi
Join Date: Nov 2014
Location: Toronto, Canada

iTrader: (0)

Last time the car died, the tow driver was a real gun, great guy, said the amount of new cars with power draws is absolutely INSANE. He calls it a plague and said finding the issue can be a monumental shit show.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:14 PM.




7post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST