Dell 3K7J7
Dell 3K7J7
CE / RoHS / ISO9001 safety certification

Replacement 3K7J7 11.1V(Wider than 65WH) 8700MAH/97WH/9Cell Battery for Dell Latitude E5440 E5540 Series

Product Code:DEL2241

Any questions please contact us freely
  • free shipping

£ 82.55£ 94.09

Condition :Brand New

Item Code :DEL2241


Battery Type:Li-ion

Battery Voltage:11.1V(Wider than 65WH)

Battery Capacity:8700MAH/97WH/9Cell


Warranty:Full 12 Months Warranty and 30 Days Money Back

Availability:IN STOCK!

Features of Our Dell 3K7J7 replacement battery:
• Each Dell 3K7J7 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.



We focus on providing high quality batteries and related accessories. This New Laptop Battery for Dell 3K7J7 is designed for long-lasting and stable performance. It provides a one-year warranty and has passed CE / RoHS / ISO9001 safety certification. Round-sealed package ,faster delivery and thoughtful after-sales service will make you feel assured to purchase.

Condition: Replacement, Brand New
Brand: Dell
Battery Type: Li-ion
Battery Voltage : 11.1V(Wider than 65WH)
Battery Capacity : 8700MAH/97WH/9Cell
Warranty: 12 months

*Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device.

Compatible Part Numbers:
Compatible Part Numbers:

Dell Latitude E5440 Series
Dell Latitude E5540 Series

Security Technology

Product Feature:

Professional manufacturer,one year warranty,CE ROHS MSDS Certificates, 100% brand new Dell 3K7J7 battery but low price,genuine grade A cell ensure the high quality and stable performance of our Laptop Battery.

Grade A cells Li-ion battery for Dell 3K7J7.

Provides excellent discharge characteristics. Over 500-800 times of charge and discharge.

100% Compatible with original manufacturer equipments, guaranteed.

Includes inbuilt over-charge, over-current, over-voltage and short-circuit protection.

Utilizes state of the art printed circuit board (PCB) design to provide stable and safe performance.

Brand New, 30 Days Money Back, 1 Year Warranty, 100% Secure Shopping Guarantee!

Follow the notice below, Better using your Dell 3K7J7 Laptop Battery
  • Storage - Store your Dell 3K7J7 Laptop Battery in a clean, dry, cool place away from heat and metal objects. The Dell 3K7J7 batteries will self-discharge during storage; remember stored at about 40% state-of-charge.
  • Charge and discharge - For lithium ion batteries, you do not need to discharge them fully and recharge constantly. You need to do a full discharge only about every 30 charges. Do not charged to higher voltages than its threshold voltage.
  • Exercise Your 3K7J7 Battery - Do not leave your batteries dormant for long periods of time. We recommend using the battery at least once every two to three weeks. If a battery has not been used for a long period of time, perform the new battery break in procedure described above.
  • Calibrate Your batteries - If your Battery's 76% even less in work , you must fully charge, fully discharge, and then fully recharge the Laptop Battery pack.
  • Consider removing the 3K7J7 battery from a laptop when running on fixed power.
  • Do not short-circuit. A short-circuit may cause severe damage to the battery.
  • Avoid propping your laptop on a pillow, blanket, or other soft surface that can heat up. Your Dell 3K7J7 battery is a lot less efficient when not within its standard operating temperature range.
  • Attention:
  • the capacity is low in current,CPU will be in electricity-saving model and battery can not be charged.In this case,take off the battery and fit on to rouse the CPU. The Dell 3K7J7 battery can be charged then.
  • Remove the battery when don't use if for long time,or the currency will be lost and the cell will be damaged.
  • Recharge the battery as the circle more than once per month to make the management of capacity reach its best status, and prolong 3K7J7 Laptop Battery useful life.
Payment Methods

Payment Methods

Q: How to check this battery is compatible with my laptop?
  • A: Please find out your old battery's part number or the exact model name of your laptop at first (like 'Dell Latitude E5440 E5540 Series'), then to match our product compatibility chart. Second please compare your old battery to our product images ensure their shape is same. Finally check the voltage(Rating) is same to your old battery's. More details please click How to find one correct battery for my laptop?
Q: Does your replacement Dell 3K7J7 battery compatibles with my original Dell 3K7J7 battery?
  • A: 100% OEM compatible, guaranteed to meet the specifications of your original Dell 3K7J7 battery (ensue same size & high quality). And all our replacement Dell 3K7J7 batteries have obtained international certification( CE, UL, ROHS, ISO9001/9002 ).
Q: How to charge a new battery for Asus Rog B551 for the first time use?
  • A: New Dell 3K7J7 battery pack is normally shipped in its partially charged condition. Please cycle your new Dell 3K7J7 battery pack by fully charge and discharge it for 3-5 times to allow it to reach its maximum rated capacity before use.

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