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PA10 dell ac adapter 310-2862 310-3399 310-4002 310-7698 310-7699 FF313
PA10 AC Adapter for Dell Laptops - 19.5 Volts 7.4mm-5.0mm
List Price: $69.99
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PA-10 AC Adapter for Dell Laptops
Dell Inspiron 15R - 7520 Battery Replacement
6 Cell battery for Dell Inspiron 15R (7520) Laptop
List Price: $149.00
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Dell Inspiron 15R (7520) Laptop Battery
Dell Latitude E5420 E5420m E5520 E5520m E6420 E6420n E6520 E6520n Laptop Battery T54FJ X57F1 312-1163 HCJWT K4CP5 KJ321 NHXVW P14F P14F001 P15F P15F001 P15F002 P15G P15G001 P16G P16G001 P16G002 PRRRF T54F3
9 Cell Battery for Dell Latitude E5420 E5420m E5520 E5520m E6420 E6420n E6520 E6520n laptop
List Price: $169.00
Our Price: $119.90
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9 Cell Dell Latitude E5420, E5420m, E5520, E5520m, E6420, E6420n, E6520, E6520n Laptop Battery Replacement

This is a brand new Dell Latitude replacement 9 cell battery. This battery is going to be physically larger than the original 6 cell battery and will protrude to the rear of the laptop about one inch, but will not be noticeable when the screen is opened. The superior South Korean cells inside this battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your Dell Latitude laptop computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

  • Brand:
  • Voltage:
  • Battery Capacity:
  • Battery Type:
  • Cell Origin:
  • Color:
  • Warranty:
  • Guarantee:
  • Useful Life:
  • XTend replacement computer battery
  • 11.1 Volts
  • 7800 mAh;
  • 9 Cell Li-ion (smaller 6 cell battery here)
  • Samsung (South Korea)
  • Black
  • 2 Year Warranty
  • 30 day full satisfaction guarantee
  • 300-500 recharge cycles

This battery replaces the 9 cell Dell Latitude E5420, E5420m, E5520, E5520m, E6420, E6420n, E6520, E6520n series laptop batteries.

Replaces these many Dell laptop battery part numbers:


Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.

How to care for your Dell Latitude E5420, E5420m, E5520, E5520m, E6420, E6420n, E6520, E6520n battery:

You can extend the life of your laptop battery significantly through the proper care and handling of your battery.

  • Any new laptop battery should first be fully charged by leaving it plugged in overnight. Once a computer battery is fully charged it will no longer accept any more power. It is a common practice to leave laptops plugged in after they have been turned off so that the battery has a full charge the next time you use your laptop. It is probably fully charged within 5 hours.
  • A brand new notebook battery is in a weakened condition since it has not been conditioned yet. Condition and break in your new battery by performing 5 partial discharge and recharge cycles the first week you receive your new battery.
  • Run on battery power without the AC adapter cord at least once a week to keep the battery cells active and at their peak potential. When your laptop is plugged into the power adapter the battery goes to "standby mode" while your laptop runs directly on electricity from the wall outlet.
  • Even though your battery indicates it is fully charged, your battery will return to a weakened state again in a few months if it does not get some exercise through partial discharge and recharge cycles while running on battery power alone.
  • If your battery has not been actively used 2 months or more, condition your battery again with 5 partial discharge & recharge cycles to increase the batteries capacity and run time.
  • Don't run your battery all the way to empty. Your battery will have a longer service life if it receives shallow discharge and recharge cycles. Research has shown that the useful life of the battery will be much longer if you begin to recharge the battery any time before reaching 20% of the remaining power capacity. Recharging the battery even after 10 minutes will not reduce the battery's life span as lithium batteries do not have the memory effect which was found in older NiCad battery technology. NiCad batteries have never been used in laptops, even the earliest models.
  • Never run your battery below the 2% critically low warning point. If your battery is run below this point it may not have enough energy to even recharge. This may effectively "kill" your battery.

How can I extend my Dell Latitude E5420, E5420m, E5520, E5520m, E6420, E6420n, E6520, E6520n battery run time?

You can extend your battery run time by minimizing the power drain on your battery. A 9 cell battery will run approximately 3 to 5 hours when the battery is new. Even longer times can be achieved by minimizing the power consumption of your laptop. Here are the top ways to reduce your power consumption.

  • Reduce the brightness of your laptop screen. This is the number drain on your battery by far.
  • Avoid using the CD or DVD drive as the motor consumes a fair amount of power.
  • Turn off your wireless finder if you are not using the internet.
  • Remove any devices plugged into your USB ports or other ports.
  • Close out programs you are not using. By minimizing the load on your CPU, sometimes you can avoid having the cooling fan turn to its high speed mode.
  • Increase your memory to 4 Gigabytes. This creates less work for your hard drive. Data is temporarily written to your hard drive when your memory is not sufficient to hold all the data on the many pages you may be accessing.