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ap21-mk90 7.3V 4200mah Notebook Battery for Asus Eee PC T91 T91MT T91SA-VU1X-BK T91 S101

   out stock $85.00
IN STOCK Usually ships the same business day
Local delivery .The parcel is only sent to the United States .
  • Overview
  • Specifications

asus ap21-mk90 laptop battery 4200mah 7.3V

Stay unplugged longer with this genuine Asus Eee PC T91 T91MT T91SA-VU1X-BK T91 S101. This rechargeable battery uses Lithium-Ion technology and can be used as replacement for aging batteries or as a convenient spare battery.


  • Li-ion technology
  • asus ap21-mk90 battery
  • Battery energy (Watt-hours): 4200mah
  • Compatible with the Asus Eee PC T91 T91MT T91SA-VU1X-BK T91 S101

asus ap21-mk90 Replace battery part number:

asus ap21-mk90 is also compatible with the following models:


ASUS Eee PC T91 S101

Asus Eee PC T91 Tablet




Learn more about the asus ap21-mk90

High Quality: All products from our shop are 100% the highest quality! We provide the high quality Laptop Battery e.g:asus ap21-mk90 for the lowest price with the most satisfacto-ry level of service, The shopping at our shop is easy,benefits,fast and secure.
Lowest Price: works hard to bring you low prices and Offer you 100% the highest quality product.
Our Service: We have a dedicated team for customer service executives, who are eager to help you save time and money by sharing their knowledge and expertise on battery and related products.
Your Satisfaction: Our goal is 100% customer satisfaction.We stand by the quality of our asus ap21-mk90 battery and offer 1 Year Warranty ! 30 Days Money back.APPLE 616-0805 battery is best compatible with the original equipments.

How to Maintenance your new replacement asus ap21-mk90 battery?

1. New asus ap21-mk90 battery pack must be fully charged before use.
2. New battery pack needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity.
3.Laptop battery undergo self-discharging when left unused. Always store a asus ap21-mk90 battery pack in a fully charged stage for storage.
4. Fully drain and fully recharge your battery pack every few months.
5. Turn down the LCD brightness of your portable device.
6. Use built-in power management on your portable device.
7. Turn off LCD or other unnecessary accessories when not in use.
8. Set screen saver blank to 1 to 2 minutes of your notebook
9. Add more RAM if you have extra RAM expansion slot, it will reduce the usage of hard drive and it is power exhaustive.
10. Close unused software in your asus ap21-mk90 laptop.
11. Remove unused PC Cards or USB devices from your notebook.
12. Don´t watch DVD or play graphics intensive video games.
13. Don´t short circuit terminal or store your asus ap21-mk90 laptop battery pack with metal parts.
14. Don´t drop or mutilate the asus ap21-mk90 battery pack.
15. Don´t expose to moisture or water.
16. See more battery tips at Battery Tips.