Product reviewsHP QK640AA ltra Extended Life Notebook Battery

Will keep your EliteBook going

As an astronomer I would always lose battery life fast out in the field on cold nights. This mega battery from HP was the answer. While it doesn't live up to the hype of the 32 hour claim, well short of it, the BB09 will keep you going all night with power to spare. I should note I require full use with all power saving features disabled.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: letzmakeadeal512

EXCELLENT LONG LASTING BATTERY

This is an excellent long lasting battery, as described buy the seller. The first 3 days after charging it, I used my Elitbook Notebook Laptop approximately 3 hours each day without having to recharge the battery. I am very satisfied with this product. I can now take my laptop on extended trips from home without having to worry about a low battery count. I highly recommend it for those of you that are always on the go.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: computersofhouston

Amazing battery, all these years later

Easy way to double the battery life of a compatible HP laptop. I get 8hrs+ with it plugged into a Zbook 17 instead of 4hrs max. With the primary battery alone. Surprisingly retained most of its capacity after 7 years in the box.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: computersofhouston

GREATLY extended battery life, from 60-90 min to 5-8hrs

GREATLY extended battery life, from about 60-90 min to 5-8hrs depending on whether you're editing a Word doc or something very intensive like CAD/Video editing or running Virtual Machines

Now I can use my Workstation for up to a full work day without needing to plug in to AC power.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: computersofhouston

Excellent purchase!

Initially when plugged in the battery indicated that it was dead. Gave it overnight to charge and it made my laptop a powerhouse. I easily can get 10+ hours on a charge

Verified purchase:  Yes | Condition: pre-owned | Sold by: electronixredux

Great, long battery life

Great product, very slim in my opinion and extends your battery life by a good five hours at least. Depending on what you are doing.

Verified purchase:  Yes | Condition: new | Sold by: munsylvania

Till now working well

Verified purchase:  Yes | Condition: pre-owned | Sold by: compupartsandmore

Great deal

It was just as described.

Verified purchase:  Yes | Condition: new | Sold by: 8ten1944

No title

Works well.

Verified purchase:  Yes | Condition: new | Sold by: computersofhouston

More power capacity than the laptop's own battery. Great value

Verified purchase:  Yes | Condition: new | Sold by: computersofhouston