DMKAOLLK CS03XL Laptop Battery for HP EliteBook 840 850 755 745 G3 G4 ZBook 15u G3 G4 Series 800513-001 800231-1C1 800513-001 CS03 CS03046XL HSTNN-IB6Y HSTNN-UB6S HSTNN-I33C-4

Perfect fit, good instructions, and the tools to install.Hard to rate quality and battery life, haven't tested it. Seemed to perform as well as the original during the "seasoning" of the battery... Charge fully, discharge fully... 3x's...You can see from the picture the old battery was no longer any good; everything matched and fit perfectly. The other pictures show the location of the battery and how it drops into place.If you're questioning your technical skills, give it a try anyway... just have the local 12 year old on standby in case you have trouble. If your closeup vision isn't very good and bright light doesn't help, you probably want to have someone else do this, those little screws on the bottom of the laptop are the hardest part of this process. Fear not... but use a white towel and good lighting and you'll be fine...The hardest part about changing the battery on the HP laptop was not losing the tiny screws. Recommend placing the laptop on a white or solid light colored towel so you don't scratch the case and if the screws fall out of the bottom you'll find them easily.There's no reason why anyone could not replace this battery themselves. The instructions are clear and the tools will work fine, just do NOT overtighten or force them. The tools seem to be intended to be used once or twice. There is no real danger of damaging your laptop, just don't fiddle with things you don't understand when you're in there. Excellent value for the battery. When my other HP needs a battery I'll be buying this product again.

perfect !

Perfect fit easy to install and good price

It wasn't as easy as I had jhoped to remove the back of my laptop to access the battery compartment. Once I did, however, the battery was easy to replace.You need to "train" the battery by charging/draining a few times which is a bit of a pain, but maybe they're all like that.

This brought my old laptop back to life.

Perfect fit, fast delivery, recommended. 👍

Perfect experience...quick delivery and great product. Laptop now is working great thanks to the new battery.

This battery identifies itself to the OS as a 46.7 Wh battery ("Energy (design)") even though it very clearly says 48 Wh on the battery itself. Other batteries that I have bought identify themselves correctly, meaning that Whrs on the label match those the battery reports to the OS. Also the manufacturing date is over a year old... so i guess it's been sitting on the shelf for a while. I'm not planning on returning it as 46.7 Wh is close enough to 48 Wh but I do wish that the advertised capacity would match what is reported to the OS. Installation was a breeze and... it comes with it's own screws so I didn't have to remove them from the old battery as I have to do with some other batteries.