This HP 640320-001 battery Replaces:
This 640320-001 battery Fits The Following HP Models:
HP Pavilion DM4
Features of Our HP 640320-001 replacement battery:
Each HP 640320-001 replacement battery unit is made of high-quality lithium-ion cells for longer last time.
The battery is up to standard and fully compatible with original specifications.
All our batteries are certified by CE, UL, ROHS, ISO9001/9002 as safe products.
The interface metal and fixed insulator of the battery are made of good materials to ensure stable current input and durability.
Why Buy From batteryone.co?
-- Assured Quality
batteryone.co is dedicated to providing quality products to customers. The products must go through three standard quality control processes at our warehouse before they can be shipped.
-- 30 Days Money Back
All 640320-001 batteries are covered by 30 days warranty for the refund! If you are not satisfied with our battery, you can contact our customer service to request a refund.
-- 1 Year Warranty
We offer 12 months warranty on our all batteries! During this period, if your battery fails, we will replace your 640320-001 battery with a new one.
-- Fast Delivery Services
When we are sure that your order is without any problems, we will immediately arrange the appropriate courier for your order and ship within 1-2 business days!
-- Best Prices
Shop with us and expect to pay 20-50% less than any other site. If you do find a product for less on a competing website then tell us and we will resolve to match it.
-- Wide Product Range
batteryone.co has more than 100,000 batteries for laptops/notebooks. batteryone.co is always developing and adding products to its site to meet your demands.
-- Customer Service
At batteryone.co there is a large team of highly trained customer service experts ready to answer your questions. They can be reached through email, live chat. It doesn't matter which way you get in contact with batteryone.co, you will get a response within 24 hours.
Q: How to charge a new battery for HP 640320-001 for the first time use?
A: New HP 640320-001 battery pack is normally shipped in its partially charged condition. Please cycle your new 640320-001 battery pack by fully charge and discharge it for 3-5 times to allow it to reach its maximum rated capacity before use. (Note: it is perfectly normal for a battery to become warm to the touch during charging and discharging).
New batteries are hard for your device to charge; they have never been fully charged and are therefore "unformed". Sometimes your device's charger will stop charging a new battery before it is fully charged. If this happens, simply remove the battery from your device and then re-insert it. The charge cycle should begin again. This may happen several times during your first battery charge. Don't worry; it's perfectly normal.
Q: The HP 640320-001 battery has been installed several times, but laptop can't boot up?
A: Carefully check if interfaces of the computer and the battery are correctly connected. If the cause of loose contact is ruled out, please contact the after-sales customer service to ensure that the battery part number and laptop model are matched.
Q: How to store the HP 640320-001 battery if you won’t use it for a long time?
1.It is not a feasible way for you either fully charge or fully discharge battery if long term storage. Security risks will generate if under a fully charged state, while both cells and control circuit protection lock will be deactivated if under a fully discharged state. So you’d be better store the HP 640320-001 battery at a half fully charged state and keep it in a cool, dry place. 20 degrees Celsius is the optimum storage temperature.
2.Install and run HP 640320-001 battery as often as possible(at least once a month) so as to ensure its availability and avoid power drain.
Q: How to extend the life of your HP 640320-001 battery?
1.Please fully charge your laptop before using it for the first time. Because the HP 640320-001 battery is normally shipped in a partially-charged state. Please cycle your battery pack by fully charge (more than 12hours) and discharge(less than 10%) for 3-5times to reach maximum rated capacity.
2.Please don’t discharge battery to 0%, which is the most common reason among faulty batteries. It will damage battery if the laptop usually works at a critical power level ( below 3%).
3.Charge the battery before it runs to 20%. It is scientifically justified that charging battery at 20% till 80% will extend battery life to the longest.
4.If your HP 640320-001 battery won’t be used for a long time, please charge it once a month and keep battery power over 50%, remove it from your laptop and store it in an antistatic bag in a cool, dry place.
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Currently, all of our shipments are through Priority Mail (EMS USPS),if you are dealer,you can selected others .We can not offer Overnight (UPS Red) and 2nd Day Delivery (UPS Blue) .
Shipping & Handling
Free Shipping on All Products
All orders placed for Standard Shipping on all stock items will be ship within 1-2 business days.
Estimated Delivery Time:7-15 Business Days
It is very easy for you to check the status of your order and locate the package during transit, as an email with a tracking number will be sent to your email address after your order has been shipped out. Tracking number will be emailed to buyer once your ordered item is shipped out.
Shipping rates: Our rates include the expenses of shipping, handling and the high quality packaging.
Attention: Priority mail will be used for all PO Box shipping addresses ,But All APO's and military addresses do not apply here. Please use standard shipping for these. Thank you.
How to find Lenovo Battery Part Numbers?
Essential to the purchase of your new laptop battery is the part number. A part number is a unique identifier that is assigned to a part to simplify referencing and to unambiguously define a part within a single manufacturer. Knowing about part number of the battery will more accessible to buy a correct battery, and it is comparatively accurate to search a battery by its part number than the model name of laptop.
A laptop battery has at least one part number (that is, the battery model we often say), and many batteries even have multiple part numbers. When you find a battery with the same part number as your laptop battery, you can be sure that it is fully compatible with your laptop.
How do I remove the battery from my Lenovo laptop?
If your laptop is plugged in, either unplug it or disconnect the power cable.
Turn your laptop over so the bottom is facing up.
Locate the battery latch on the bottom of the laptop. The image above shows some of the more common battery latches found on laptops.
To remove the battery, slide the latch switch to the opposite side and hold it in that position until the battery is released.
On some laptops, the battery pops out on its own. On others, you'll need to pull it out gently with the tips of your fingers.
Lenovo Battery Part Number Identification
Lenovo often lists several part numbers, one is called "FRU p/n", on is called "ASM p/n", and occasionally the model number is just listed on the battery with no preface. Also on many Lenovo cartridges there is a red or orange circle with a number inside it (also may contain a + sign).
Examples of Lenovo Battery part numbers:
How Do I Find The Model Of My Laptop?
Method 1: Locating The Model Number Of Your Laptop Using Product Label
This is the easiest and the most efficient way of locating the model number of your device. Follow the steps given below to get your model as well as product number:
1.In most of the laptops, the label containing the information is located on the lower side of the device. To locate it, first of all, unplug the laptop from any AC cable and shut it down.
2.Reverse your laptop and keep it in a safe place.
3.On the base of the laptop, you may see a label where an icon of your computer manufacturer is printed.
Please note: on some laptops, the label is inside the main battery compartment, and you must remove the battery to read the label. In addition, the manufacturer may print the model of the laptop (such as E5-572G-593Y for Acer Laptop) on or near the keyboard.
Figure 1: Label on or near the keyboard
Figure 2: Label on the back of the notebook
Figure 3: Label inside the battery compartment
Figure 4: Near power button (such as Latitude E6410 for Dell Laptop)
Figure 5: View the Power On Screen (such as Latitude D630 for Dell Laptop)
Method 2: Locating The Model Number Of Your Laptop Using System Information
This method works very well if your laptop is in working state. Most of the old computers’ sticker get rub out by time and becomes illegible. Hence, this method is considered best among all cases to locate your laptop model number. This technique works very fine with all the latest Windows 7/8.1/10 Operating Systems.
1.Head on to the home page of your laptop.
2.Click windows start button button and get on to 'Run' menu. You can also do this by using the shortcut key ⊞Win + R.
3.Type in "msinfo32" without quotes.
4.Click OK. This will open the Windows System Information utility, which contains details about your specific model of laptop (such as Latitude E6520 for Dell Laptop).
5.Find and write down the "System Model" number.
Method 3: Locating The Model Number Of Your Laptop Using Access Of BIOS
This method is the last option but the most successful one. If above methods did not work on your computer, you can rely on this.
BIOS stands for Basic Input/output system, you can access this system and find out the information about your computer using the steps given below:
1.Close all your applications and save in case you are doing some important work. Restart your computer.
2.As soon as your computer turn on, immediately press the F2 key or ESC key whichever your computer supports to go to the BIOS Menu.
3.If you failed to go to the boot menu, again restart your computer and follow the above steps again.
4.Once you get into the BIOS, you can see the full information such as model number, the product number of your computer.