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IBM 600 Series Laptops and Flaky Batteries?
netdemonboberb asks:
"I don't know where else we should turn, because no site will write articles on [this subject] and IBM is denying that their IBM 600 series laptops have flaky batteries. Rensselaer Polytechnic Institute distributed these laptops to freshman students in 1999 and almost everyone I knew in my class had this issue. Ralph Levien's page has suggested it appears to be an issue with the 'Smart Monitoring' circuitry.
I'm writing this article to get the issue out in the open so IBM can no longer deny it. These batteries are expensive, and I have had to replace mine 4 times already. Can anyone who reads/maintains slashdot help or provide any advice on getting resolution for this?" I must say that from personal experience, I've wondered if this might be the case as well. I have an IBM Thinkpad 600e laptop and I've already gone through 2 batteries. The laptop is currently inactive as it must be tied to the wall if it is to be used. Has anyone else experienced shorter-than-average battery life using these laptops? Were you able to do anything to improve the battery life?
These laptops are 3-4 years old. Laptop batteries last 1-2 years under moderate use, less if you recharge more often (Heavily used ones last under 6 months sometimes).
Where's the problem?
"You've got an invalid haircut" -Warren Zevon - Life'll Kill Ya
I would suggest contacting the Better Business Bureau to get these complaints addressed.
Not an IBM, but apple's ibooks have the same problem. The dropoff point on the battery goes up and up and up (for fun I held onto my last one until you unplugged it, the battery discharged to 97% before going dead). I was wondering if it was a charging problem or if there is a common li-ion battery manufacturer who is at fault...maybe a common manufacterer makes the same battery charging components for IBM and Apple, though?
You can have a look here for some reports of the dead batteries (though most of the people there are blaming it on jaguar, I run linux on my ibook and have had the problem twice).
So stick it to apple while you're at it, eh? Of course if you're smart, buy the extended warranty. It will cost apple a lot more money to give you an extra battery every 3 months for 3 years than it will to fix/replace your ibook probably. Might as well teach them a lesson...
The Right Reverend K. Reid Wightman,
I have deployed and supported both Thinkpad 600 and 600X configurations, and Dell Latitude 366 and 300 MHZ models, and they all seem to have batteries that last just over a year.
Literally, to the point that we will get a sudden surge.. six or so a week, of stone dead batteries. A little digging on my part led me to believe that the six came in together as well, and they usually died a little bit over a year after purchase. (Note, this is a "little bit" after the warranty.. batteries are warranted for one year from date of purchase of the LAPTOP not the battery, at least here.)
Now, the IBM's have a charging circuit that keeps the battery "conditioned". Would this kill a battery in a year? Probably. WHat I know a lot of people do is ONLY put the battery in if they are going to use it off AC. Charge it for an hour before you need it, and run it down. When you get back to your desk, pop the battery out, and dock without the battery.. that seems to be the "rage" as rumored by our customers who have traveled to Japan, where they claim people do this.
YMMV, but as a tech who supports about 1K of these things, yeah.. the batteries die in a year, and yeah, the IBM party line is "this is normal".
Maeryk
Feminine Protection? What is that? A chartreuse flame thrower?
I've had 2 TP 600's (a PII-266 TP 600, and a PII-366 600e), both used. The 600 came with a battery that it seemed wouldn't die, and the 600e came with a dead battery.
:
It seems this is not an unusual situation, if you spend a little time looking around on eBay. Here's how to avoid trouble
1. Do a search for 'dead Thinkpad 600 battery', and note the FRU#'s.
2. Do not buy a replacement battery that matches one of those numbers. It's just a matter of time. If it's not dead already, it will be.
I don't know the FRU# on it (process of elimination following step 1 above will tell you which ones are ok), but it's my recollection that they fixed this problem. You just have to find the right battery.
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Ack! NO!!!! Not for lithium cells!
If you actually managed to fully drain a lithium battery, you would run the risk of polarity reversal. That is BAD! Part of the reason lithium battery packs have a microchip is to shut them off before they fully discharge. The chip also regulates the charge cycle so they don't grenade from overcharging.
NiCD batteries develop a charge memory and must be conditioned. NiMH batteries do to but to a much lesser extent. Lead acid batteries are the exact opposite, keep 'em charged up at all times.
Just remember, who's lap it's on top of.
OK, I just checked some stats on my batteries for fun...
Between the two of them I have a design capacity of 38.88 + 34.56 Wh. In reality I have a functional full-charge capacity of 20.06 + 23.06 Wh respectively. I unplugged the power and I'm down to 19.54Wh + 22.06Wh in one minute.
The discharge cycle counts are 144/329 respectively.
Generally, it's about 2 hours of real use I get out of them, The calculated time is 4:14, but it's going to turn out a lot less than that.
I don't know if this means I have a normal set of batteries or not, but I'm not as impressed with them as I used to be. I had hoped that Li-Ion was better than the Ni-Cd of yester year.
At this rate, I can hardly code my way across the country. Originally I was able to run >7 hours of use.
My wife's ibook is an original blue one. She still gets 3+ hours out of the battery. Enough for her to work on a plane from west to east coast without a charge.
IBM actually distributes a "maintenance and care" flyer with their new Thinkpad's. It clearly states that the battery is a consumable item with performance tapering over the useful life. As far as I am concerned, the 600 series batteries lasted much longer than the Compaq's or Dell's, which go bad after about a year.
Since the battery warranty is only good for one year, it helps to simply call it in for repair at this point. Or get the Best Buy 4-year service contract. I've had them replace a stack of 600 series batteries over this kind of time frame.
Life is the leading cause of death in America.
Apple does 3 things right on the power front.
1. CPU's draw less power. While Apple uses the same CPUs in it's laptops as it's desktops (And the same core logic), it's CPU's are very energy efficient. This does allow them to have a nearly unnoticable performance gap, unlike the desktop world (A 1.8GHz Mobile P4 is not faster than a 1GHz standard G4).
2. Big Honking batteries. Apple uses 47, 55 and 61 watt-hour batteries, most PC laptops top out at 38-40 watt-hours. Between this and the much lower draw CPU's is why 'Books see 4-6 hour battery life and PC's see 2.5 hours on a good day.
3. High Quality Batteries. Apple buys Sony batteries. This is one reason that you seem to get less laptop for more cash. It's also a reason why apple batteries last 3-5 years and PC batteries don't. Cheap ass batteries (Like those in low-end Thinkpads) don't last.
"You've got an invalid haircut" -Warren Zevon - Life'll Kill Ya
http://www.batteryuniversity.com/partone-5.htm
The basic gist of it is this:
Lithium-ion has low maintenance, low self-discharge rate, and battery packs have built in circuitry to protect the pack from complete discharge and damage. I point you to the quote "Some capacity deterioration is noticeable after one year, whether the battery is in use or not."
I have recently replaced the battery in my Dell laptop after it's 1.5th birthday. Pricy, but all the research I did indicated that that's the lifetime of the pack, wether used or not.
Seriously, the (simple) replacement of a $100 part once a year for the life of a $1000-3000 device is part of the TCO.