View Single Post
  #78  
Old 09-18-2011, 09:14 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,476
Mein Auto: 02 BMW 525i M54 auto 130K
What specific gravity test tool do most of you use to test your battery?

Quote:
Originally Posted by pleiades View Post
I wouldn't pay Autozone's price again
What is cheaper?

I can't find anything cheaper yet, at least by calling all the local stores:
  • Autozone
  • Kragen (owned by O'Reilly)
  • O'Reilly
  • Napa
  • Pep Boys
Quote:
Originally Posted by pleiades View Post
The battery compartment in an e39 trunk has two or three screw holes for the bottom clamp, to handle batteries of different lengths.
I took my battery out today, and I see what you mean; it looks like there is plenty of room for shorter-length batteries than the BMW battery.


Quote:
Originally Posted by pleiades View Post
it's somewhat lighter than the original BMW unit.
I see what you mean; it was difficult to get out of that deep trunk compartment!


My BMW battery is 720 CCA; I think the Duralast is more so I'm surprised it's lighter.

Quote:
Originally Posted by Monkeyking View Post
Picked up the duralast 49-DL today at autozone.
I don't make decisions that easily. I am still debugging mine. I took the vent caps off. Added 15 ml to most of the cells; had to add 60 ml to one and 30 ml to another though. Then I charged it for a few hours. Pegged the needle at 6 amps for about an hour; then dropped down to 3 or 4 amps.

From googling, I find that most American batteries are made by three companies:
- Consumer Reports: Car Battery Buying Guide

Quote:
Originally Posted by consumer reports
Most auto batteries are made by just three manufacturers:
  • Delphi
    • ACDelco
    • & some EverStart batteries (Wal-Mart)
  • Exide
    • Champion
    • Exide
    • Napa
    • & some EverStart batteries
  • Johnson Controls Industries
    • Diehard (Sears)
    • Duralast (AutoZone)
    • Interstate
    • Kirkland (Costco)
    • Motorcraft (Ford)
    • & some EverStart batteries
My BMW battery seems to be made by "DBMC, Winston - Salem, North Carolina", which turns out to be Douglas Battery, which is the OEM battery manufacturer for BMW, in America (apparently).



BTW, I couldn't find a battery chart on the Costco website; but I did find this chart on a private web site that agreed that Costco doesn't list the available batteries online as of February 2011:
- Costco California, Kirkland Auto Batteries, summary

Unfortunately, they don't seem to have the group 49 battery.

Since Johnson Controls Industries makes the vaunted Duralast 49-DL, I will probably pick one up tomorrow if the battery fails the specific gravity test.

BTW, what specific gravity tester do most of you use (since I have to buy one tomorrow)?

Attached Thumbnails
Click image for larger version

Name:	removing_bmw_battery.jpg
Views:	4000
Size:	174.9 KB
ID:	293668   Click image for larger version

Name:	battery_hold_down_clamp.jpg
Views:	4112
Size:	199.3 KB
ID:	293669   Click image for larger version

Name:	battery_charger_needle_pegged.jpg
Views:	8687
Size:	96.3 KB
ID:	293670   Click image for larger version

Name:	battery_cell_caps_removed.jpg
Views:	3832
Size:	99.1 KB
ID:	293671   Click image for larger version

Name:	original_bmw_battery.jpg
Views:	4202
Size:	175.2 KB
ID:	293672  


Last edited by bluebee; 09-18-2011 at 10:29 PM.
Reply With Quote