This Dell 9NJM1 Battery has a capacity of 99Wh and a voltage of 11.4V. Suitable for Dell Alienware 17 R4 ALW17C-D2738 D1738 D2748 D2758 R1748. 100% compatible and 100% safe. 1-year warranty, 30-day money back guarantee. 

Dell 9NJM1 99Wh 11.4V Notebook Battery

(product code: 9NJM1) （Usually ships the same business day!）

• Product details：
• Brand: Dell 9NJM1 Notebook batteries
• Type: Li-ion battery
• Voltage: 11.4V
• Capacity: 99Wh
• SKU: DEL3023

Replace the following batteries:

0546FF 0HF250 44T2R 9NJM1 HF250 MG2YH

Compatible with the following models:

Dell Alienware 15 R3
Dell Alienware 17 R4
Dell ALW17C-D1738
Dell ALW17C-D1748
Dell ALW17C-D1758
Dell ALW17C-D1848
Dell ALW17C-D2738
Dell ALW17C-D2748
Dell ALW17C-D2758
Dell ALW17C-R1748

• If you cannot find what you need, we have some sister stores. Here we go!
• ES: Dell 9NJM1 Batería 
• 
  
• NL: Dell 9NJM1 ACCU 
• 
  
• IT: Dell 9NJM1 batteria 
• 
  
• DE: 9NJM1 Akku 

http://www.notebookbattery.co.nz/laptop-batteies-dell/replace-battery-9njm1-b179320.htm

Extend Notebook Battery Dell 9NJM1 Service life 

1.Charge the battery! Consider keeping it plugged in for 12 hours before you unplug.

2. Switch on the optimized battery or power feature. You'll find this option — sometimes referred to as max battery mode — in your Notebook Battery system's built-in power management control panel. You can select the option to reduce the amount of time your inactive Notebook Battery stays on before powering itself down and going to sleep.

3. Remove the battery and clean the metal contacts. Wipe them with alcohol, ideally every two months, to ensure that the power transfer between the Notebook Battery and its battery is as efficient as possible. Allow the battery to dry thoroughly before replacing it! 

4. Unplug any Notebook Battery accessories you aren't using. Even if they're not in use, accessories drain power from the battery.

ABOUT US

Wholesale and retail Notebook Battery in NZ. Replacement for Acer, Apple, Compaq, Dell, FUJITSU, IBM,Lenovo,Sony and so on.

These may be you want to look for :

WT4090 battery replace for Symbol Motorola WT41N0 BTRY-WT40IAB0E

BL258 battery replace for Lenovo Vibe X3 Lemeng X3 X3C50 X3C70

45N1151 battery replace for Lenovo ThinkPad T440p T540p L440 L540 W540

BL211 battery replace for Lenovo P780

NE116BW2 battery replace for Lenovo 110S-11IBR Series 0813004 5B10M53616