HP MU09 Long Life Notebook Battery

HP MU09 Long Life Notebook Battery

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UPC: 884962734155   Part: WD549AA#ABB


HP is dedicated to providing you with innovative power solutions to increase your notebook's entertainment and productivity value while reducing your total cost of ownership. The HP Long Life Battery has up to a three year life span – backed by the industry’s first three-year limited warranty. HP is committed to the environment and reducing battery waste. Fewer batteries are used over the life of the notebook with HP Long Life Batteries making this a smart choice for you and the environment.


  • Lower Total Cost of Ownership: One battery has an up to three year cycle lifespan, reducing your overall battery cost since you purchase fewer batteries over the life of the notebook.
  • Flexible Solutions: With up to three years of warranted performance, you can enjoy the entertainment and productivity features of your notebook for longer then with standard solutions.
  • Environment: HP is committed to protecting the environment and we design our products with that in mind. New technology reduces overall battery waste by requiring fewer batteries to be used over the life of the notebook. HP gives you the option to benefit not only yourself but the environment as well.
  • Intelligent Construction: An insulating safety wrap is used to enclose the cells.; A fire-retardant casing, which conforms to rigorous safety standards, encloses the entire battery.; Barrier walls isolate cells from the Printed Circuit Assembly (PCA), presenting a liquid and thermal barrier.; The PCA has a conformal coating to protect circuitry from potential shorts.; Internal connections are designed to prevent pinching and potential short circuits.
  • Genuine HP Batteries: Tested with all compatible HP notebook PCs so HP can deliver the highest quality products, services, and solutions to your home
  • HP Pavilion: dm4-1000, dm4-2000, dm4-3000, dv7-4000, dv7-6000, dv6-3000, dv6-6000, dv5-2000, dv4-4000, dv3-4000; HP: G42, G62, G72; ENVY: 17-100, 17-200; Compaq Presario: CQ32, CQ42, CQ43, CQ62, CQ72


  • 1.05 lb
  • 8.07 x 2.09 x 3.81 in

What's in the box

  • Battery; documentation
  • Three-year, worldwide parts-and-labor limited warranty; 24x7 HP technical phone support during warranty period

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Customer ratings and reviews for HP MU09 Long Life Notebook Battery

Rated 3 out of 5 by Not as good as original! I bought this battery to replace my original 9 cell battery with similar specifications. The original consistently provided about 9.5 hours of power for just about 2 years until it suddenly went 100% dead. I properly conditioned this new battery with several charge/discharge cycles and it will only last 5.5 - 6 hours at most when used in the same manner. This new replacement battery is the HP recommended battery, but is does not provide anywhere near the same performance in terms of how many hours it last per charge. Hopefully the battery will at least last longer than the two years that my original lasted. December 5, 2013
Rated 5 out of 5 by Pleased I bought this review because my last battery that shipped with my laptop 3 years ago was down to half an hour before it was dead. I bought this battery and it charges quickly even with my high performance battery settings and remains charged for quite a while. With all settings on my computer MAXED out, I do use this laptop for high level gaming and photo and video editing, I'm up to four hours of battery life. I'm very pleased with this battery and would buy this product again, if needed. My laptop went into sleep mode last night, and only managed to use a quarter of the battery after being in sleep mode for almost 14 hours. When I got home, I went about 3 hours before I had to plug in the laptop. Within an hour and a half WITH heavy usage, the batter was completely charge again. It feels so good to be unplugged again! If you aren't familiar with extended batteries, they are bigger than the regular battery and do extend past the bottom of the computer. If you actually keep your laptop on your lap, this MAY be a problem for you. I've had extended batteries before, and this one is not as bad as some, but can be bothersome depending on the position you sit in. December 2, 2013
Rated 1 out of 5 by Not compatible with all DV7 models This did not fit my DV7 model even though it said it would. Customer service was no help & I ended up having to make 3 returns & I still do not have a replacement battery. I am very disappointed!! October 17, 2013
Rated 5 out of 5 by Battery does seem to be a good product The battery does seem to hold a charge for quite a while when not being used. Very easy to insert. I like that the long life battery is a little thicker because it raises the keyboard for typing. It is heavier though when transporting the laptop. I was hoping for some information on charging guidelines to come with the battery; like how to extend battery life, how to allow battery to discharge and whether it is ok to leave the battery in laptop charging overnight. When I received the battery, no battery info came with the product. Otherwise I still feel the product fulfills the manufacturer's description. I would recommend this product. October 17, 2013
Rated 5 out of 5 by Awesome Battery This is a very good stuff if you are looking to extend your life of your laptop. I am running my laptop for 4 years now and this one increased my value for money spent on this laptop. This has a battery level indicator LED lights but I hardly use it. This gives you a slight bump when kept on the table which is awesome. May be this 9 cell battery should be standard in all laptops. Happy Customer October 5, 2013
Rated 5 out of 5 by good as new after searching for several weeks. this is the only battery I could find that performed like the original battery. I get at least six hours between charges. September 22, 2013

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Owner support

Warranty information

This product is covered by the standard HP warranty

Support information

Support for this product is provided by HP Customer Care

Returns & exchange information

The HP Home & Home Office Store will accept returns or exchanges for this product up to 21 days after delivery

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