[thread killer]

optimas are JUNK. they used to be good, but are complete junk now.
if your not going to listen to what i say on the charging post, at least take my advise on not purchasing an optima. the red tops' are just junk.
an oddyssy battery, or the exide orbitals last much better than optimas.


then again your taking a wet cell battery and replacing it with an AGM style battery. the car needs to be retrofitted via programming to CORRECTLY charge the battery.

AGM batteries and wet cell batteries are not equal when it comes to charging them.
you charge an AGM too quickly and :nuke: happens.
gell cells' are not designed to be used as a main battery either- they are reserve small load batteries with long amp hours (aux battery in a camper for example) and do not like being subjected to large loads either.

[Jeff@TopGearSolutions]

That's unfortunate to hear about Optimas. Although a little broad, what makes them junk now? Just curious.

Ive already replaced my batteries with Die Hard Gold. Never an issue.

Just a forewarning, as this car is quite that Pain in the you know what, people should do their research before replacing batteries on this car. Apparently you need to get it reprogrammed and such at the dealer and only certain batteries are accepted.

[thread killer]

they just arnt "abuse friendly" like they used to be. in the 90's and early 2000's they were a kick ass battery- since they have moved the operation to mexico all of a sudden their quality has gone down the tubes. yes they will warrantly them without much issue, but i bought the battery to survive tough conditions- in my mud truck or 4x4's with heavy winching/lighting/power consumption i can sometimes think that a battery will be taxed hard.


but in a rather electrically stock BMW, and it wont hold a charge over 3 days, with a 30milliamp draw (acceptable within BMW standards), and when you charge it with a 2 amp smart charger designed for AGM/gellcell/wet batteries...... it shoots to 15.1volts with a 2amp charge- then when removed it goes to 12.1.

that battery is junk..... its the second one in the last year to do that.
my 4x4's used to run them untill i got into issues like this offroad. i run oddyssy and exide gell cells now. not much issue any longer and take WAY more abuse than any of the 10+ optimas i have had in the last 10 or so years.

[shifterboy45]

Originally Posted by cn555ic

Having a dead battery....will it make the interior lights dim and when you rev the engine the the interior lights brighten until rpms fall back down...Will a totally dead battery exhibit this and if so when its fully charged and still get brighter on revs, do you think its still the battery or the voltage regulator?

the lights dimming and brightening can be cause by a low battery, if its undercharged and the altenator is trying to catch up (charging the battery) and support your accessories while driving at low speeds.

or the v/r could be giving out, especially if you have a fully charged battery, and the same thing (dim/brighten) occurs. best thing to do is have a quick charging system test to see if all the parts are doing what they are supposed to. while youre at it, have the battery load tested, there is a voltage spec it should not fall under during the test.

[shifterboy45]

Originally Posted by thread killer

DONT hook up to the battery directly.
ALWAYS go from under the hood.
OP must have been doing something wrong, there isnt a "disconnection" of the battery from the main post.


in fact, DONT mess with the negative ground either. its A) EXPENSIVE (IBS) and B) its not designed to be charged that way. it will lead to faults cause the car doesnt know where the voltage is coming from.

first question..

i know u and i have a little history ... cuz u the shietz -- but u MUST be a BMW tech, cuz u dont read well.. do you?

i will drop the quote from my previous post.. and maybe u see your histerical rambling is unwarranted..

when the battery is flat, pop the panel and pull the cables, connect the charger directly to the post with no other connections (if the car wakes it gonna draw power, which you dont want until the battery is fully charged).

[thread killer]

Originally Posted by shifterboy45

first question..

i know u and i have a little history ... cuz u the shietz -- but u MUST be a BMW tech, cuz u dont read well.. do you?

i will drop the quote from my previous post.. and maybe u see your histerical rambling is unwarranted..

when the battery is flat, pop the panel and pull the cables, connect the charger directly to the post with no other connections (if the car wakes it gonna draw power, which you dont want until the battery is fully charged).

i never said that it WOULDNT work to do that- but as it seems most people on most bimmer boards, (except for you, since you know everything, and must never be argued against ) arnt very mechanically inclined..... its just a fact- the (let me say it again so you understand) *majority*........ not ALL of them dont turn wrenches....

why risk over tightening the IBS, or yanking the BST plug out of the connector or what-have-you, when (it really doesnt matter if it has a draw or not, since a trickle charger or smart charger will just overcome it) you can charge it from under the hood.

histerical rambling is a "great" term for explaining my previous posts
what other bullshit are you going to complain about?
go ahead- i know this will eat at you. go re-read all my posts and try to poke some holes in it.
have a fantastic 1st there boss-

[cn555ic]

I opened the trunk and took out the trunk lights and waited for the car to go asleep and then I charged it....Its should be the same as taking off the post if the car is fully asleep...Anyway I have the battery as of now fully charged and the car started fine without a hitch...I still have the dimming/brightness upon revving the motor...I think what I need to do is take it out for a long ride and see what happens, but with close to 30inches of snow dump in my city, taking the car out wont be until the snow melts away...So for now I have to sit on it with a fully charged battery as of today...I will keep you updated..

[shifterboy45]

better yet, for the community sake look up SIB 61 11 09

---

cheers !!

[shifterboy45]

Originally Posted by thread killer

i never said that it WOULDNT work to do that- but as it seems most people on most bimmer boards, (except for you, since you know everything, and must never be argued against ) arnt very mechanically inclined..... its just a fact- the (let me say it again so you understand) *majority*........ not ALL of them dont turn wrenches....

why risk over tightening the IBS, or yanking the BST plug out of the connector or what-have-you, when (it really doesnt matter if it has a draw or not, since a trickle charger or smart charger will just overcome it) you can charge it from under the hood.

histerical rambling is a "great" term for explaining my previous posts
what other bullshit are you going to complain about?
go ahead- i know this will eat at you. go re-read all my posts and try to poke some holes in it.
have a fantastic 1st there boss-

thanks for the offer.. im not some old fart lookin for trouble, the years not over and i still gotta work and make some $$.

but i do want to say ---
happy new year!!