Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 08-25-2014, 05:34 AM
kuanglee kuanglee is offline
Registered User
Location: Australia
 
Join Date: Aug 2014
Posts: 2
Mein Auto: 320i 2005
Question Not sure whether safe to charge battery

Hi,

My car's battery is now completely dead (car won't even take my key in the slot) and I've taken it out thinking I needed to change it; but it's said on the battery that it's rechargeable.

Not sure whether it's safe to charge it with a wall plug battery charger, straight onto the battery, or whether to charge it while it is in the car.

Not very car savvy, any assistance would be appreciated!!!

Thanks!
Reply With Quote
Advertisement
  #2  
Old 08-25-2014, 05:49 AM
blue boy's Avatar
blue boy blue boy is offline
Officially Welcomed to the 'Fest
Location: south of east
 
Join Date: Nov 2013
Posts: 345
Mein Auto: 2011 328ix
is the battery old and died from old age or did something being on - bring it down?
sometimes you have to hit it with 25 amps for a few seconds to get the batt to take a charge. and after that normal charging at 10 amps or under for 12 hours or enough to start. keep in mind the alternator is not designed to charge up a a dead battery but to maintain it.
check for charge ports under the hood first- im not familiar with 2005 arrangements. hopefully someone with more 2005 intel will respond to bail me out.

good luck mate
__________________
surely goodness and mercy will follow us all the days of our lives

2011 328IX
Ford 150
Gen 3 Prius
Goldwing Trike
Mustang with mods
Reply With Quote
  #3  
Old 08-25-2014, 05:55 AM
kuanglee kuanglee is offline
Registered User
Location: Australia
 
Join Date: Aug 2014
Posts: 2
Mein Auto: 320i 2005
I believe the battery is dead because the car is/has been used mainly for short trips.

Also, the little spot where there's an indicator that tells you whether or not it's dead, the indicator is on 'Insufficiently Charged'.

Wasn't able to jump start/charge from charge ports because car is stuck in my garage in a tight park.

I've taken the battery out and I am currently trying to charge it with a manual 12 volt 2700 mA charger.

Thanks
Reply With Quote
  #4  
Old 08-25-2014, 07:17 AM
fdriller9 fdriller9 is offline
Officially Welcomed to the 'Fest
Location: NJ/Philly
 
Join Date: Oct 2006
Posts: 3,889
Mein Auto: '06 AW 330xi
You can't use a normal AC to DC 12v inverter. You need a battery tender or power supply.

If the battery has been dead for more than a day or 2, the plates inside are sulfating and decreasing battery performance.

Special battery tenders can repair a sulfated battery but it will never be the same.

I would just get a new battery and a simple battery tender and keep the tender on the car when it's not in use.

Make sure you use the jump terminals under the hood to connect the tender. Do NOT connect directly to the battery in the back.
__________________

| LCI Msport Conversion | Custom Kevlar/Carbon Fiber Wind Splitter | Exotic Tuning Front Lip | H&R Coilovers | M3 Subframe Bushings | E93 M3 23.6mm Rear Sway Bar | Whiteline 27mm Front Sway Bar | Ground Control Camber Kit | L7 | Hand-Made LED Angel Eyes | Breyton GTS-R | Bridgestone Pole Position S-04 | CarPC with Centrafuse Front End | Alpine MRP-M500 | Custom LED Reverse Lights | OEM Blacklines | BMW Performance Trunk Spoiler |

Last edited by fdriller9; 08-25-2014 at 07:56 AM.
Reply With Quote
  #5  
Old 08-25-2014, 09:08 AM
CALWATERBOY DUE's Avatar
CALWATERBOY DUE CALWATERBOY DUE is offline
Reregistered User
Location: Fog City, California
 
Join Date: May 2014
Posts: 1,560
Mein Auto: 09 E93 335i somewhat mod
Quote:
Originally Posted by fdriller9 View Post
You can't use a normal AC to DC 12v inverter. You need a battery tender or power supply.

It is good to have a charging profile appropriate for your battery - lead acid car batteries for instance have different profiles than lithium. A desulfating alternating current is useful initially - chargers like CTEK do this - 3300 is $52.78 w/2 day delivery on Amazon.

In a pinch can use an inverter, but it's not recommended, especially if you over-charge and start generating hydrogen - a thing that happens over 85% charge - can lead to deleterious effects.
Reply With Quote
  #6  
Old 08-25-2014, 09:14 AM
DSXMachina's Avatar
DSXMachina DSXMachina is offline
Non compos Mentos
Location: New Hampshire
 
Join Date: Dec 2007
Posts: 10,701
Mein Auto: 335i E92 TiAg 6MT ED
The OP's charger is 2.7 amps max. He should be OK in making an attempt. A more modern 'smart' charger would be better, but at this point if the battery has any age at all he might as well just replace it. I'll be watching for the "How do I know if I have a parasitic battery draw?" thread.
Reply With Quote
  #7  
Old 08-25-2014, 10:57 AM
hondo402000 hondo402000 is offline
Officially Welcomed to the 'Fest
Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,910
Mein Auto: 2007-335 HTC
or take it to you local Autozone and have them put it on their charger, just make sure you dont lock the doors or trunk while the battery is out other wise you might not be able to get back in the car
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 05:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms