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9-Cell DELL Latitude D820 D830 D531 Replacment Battery fits 3120394 3120538 XD735 XD736 YD624 DF230 DF249 FF231 0MM160 312-0538 MM165 312-0538 310-9123 [6600 mAh]
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9-Cell DELL Latitude D820 D830 D531 Replacment Battery fits
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If I have any issues as time goes on I will post it to this review.
UPDATE: Here it is just a bit over one year later and the battery is as dead as a doornail. A month or two back it was starting to act weak (only lasted about 30 minutes) and now it did not even hold the laptop in hibernate mode for 1 minute. I figured that even if it only lasted the year it was a better $/month of use than an original Dell, and I'd have to agree that it met that goal since the last Dell replacement battery I purchased directly from Dell only lasted 14 months with a one-year warranty. From now on I'll just assume that all replacement batteries last just over a year and be ready to purchase another at 12 months.
On Feb. 8, 2016, I gave it four stars: I needed to stretch the life of my old laptop, and this battery suits me. It was $19.74 instead of the $100-plus on the Dell site, and the reviews on the Dell site aren't any better. I'd ignored the "nearing end of useful life" message on my original Dell battery for two years before I got the "replace now!" message. It's not perfectly flush with the rest of the casing, but I don't care. I mostly use my laptop plugged in, so I haven't run the battery all the way down yet; the indicator on my screen estimates 1.75 to 2.4 hours of life, but I haven't tested that.
The battery I received fit acceptably into the laptop. While the OEM battery slides smoothly into the compartment and the lock snaps into place, this one doesn't go in quite as smoothly and the lock needed a little help snapping back into place.
The reason for the poor rating is that it lasted for about 9 months before it completely stopped holding a charge after it started seriously deteriorating over the course of about 2 weeks. I am careful about making sure to handle batteries in the optimum manner based on instructions from manufacturers; e.g. make sure to do a drain/charge cycle at least once a month, generally let the battery drain down to low before charging. Other than that, I really don't use the battery very much. Following these guidelines, the original battery had been in use 7 years and would still power the laptop for about 10 minutes.
The performance of this replacement followed the typical pattern of laptop batteries of 10 years ago. When it was new it lasted over 2 hours. Very soon after (approximately 3 charge cycles) it dropped to 1.5 hours. Over the next 8 months (with only about 2 charge cycles per month) it generally lasted around 1.5 hours. Then it started to a rapid decline over the course of about 2 weeks before it quit holding a charge completely. It won't even save the time settings so if the laptop is unplugged the time has to be set again on boot.
I have a D820 that spends 99% of it's time docked. I installed the new battery, checked that it was charging and thought no more of it.
Two months later I went to undocked the computer (warm undock) and after about 30 seconds the screen went blank, but the system lights remained on. I initially put it down to a poblem when undocking and thought no more of it.
A month later (when I actually needed to use it undocked)I had the same experience. I spent a couple of hours trying t figure out what driver was causing the issues with no luck.
I happened to plug an external mains adapter in, and everything worked fine. As soon as I unplugged external power, the laptop froze!
It is now too late to returns it. So I get screwed.
For $36 I was hoping I would get 12 months out of it. I think I get about 20 seconds!!
Never buying another one of these. I previously bought one for $99 with an 18 month warranty. And thy replaces it for free after 14 months. So I got 28 months at least for $99.
Comes with instructions to fully charge and discharge the battery 3 times to break-in the new battery.
I have this in a Dell D830, 2.4ghz, 4gb ram, SSD, 1920x1200 screen, brightness on full.
1st run - charge all night, drained at pretty heavy load. Runtime unknown.
2nd run - charge all day, drained at idle. Runtime 4+ hours. (monitor was falling asleep)
3rd run - charge all night, drained at semi-idle. Runtime 3.5 hours. (monitor was kept on more often)
Remind me to update this review in 6 months.