1.Power Supply 19V 4.74A 90W For Asus F5R Laptop:
Asus F5R laptop ac adapter Replacement in laptop-adapter-shop.com made from high quality Li-ion cells(Japan), though this Replacement asus f5r laptop ac adapter is not a original one, it is manufactured to meet or exceed the specifications of the original brand manufacturer, you can rest assured to purchase.

2.Replacement For Dell PA-16 AC Adapter 19V 3.16A 60W:
Replacement Dell PA-16 AC Adapter-100% Brand New Sony VGP-BPS35 Laptop Battery.Buy Cheap adapter For Dell PA-16 AC Adapter 19V 3.16A 60W from laptopchargeradapter.co.uk.This high quality Dell PA-16 AC Adapter will get your laptop up and running the right way at a reduced price.The Dell laptop ac adapter has been precision-engineered and rigorously tested for capacity, voltage, compatibility and safety to exceed original equipment manufacturer specifications.

3.19V 4.74A 90W Samsung AD9019 AC adapter:
Our Samsung AD9019 AC adapter，high quality laptop adapter for Samsung AD9019 AC adapter: rechargeable li-ion replacement Samsung AD9019，high quality laptop power charger for Samsung AD9019 AC adapter 100% compatible with the original Laptop adapter. No Lead, Also already through ROHS authentication, CE and UL.

4. Power Supply For Asus Eee Slate EP121:
This Asus Eee Slate EP121 replacement laptop ac power adapter is rated at 19.5V/3.08A, 60W rechargeable, removable, Lithium Ion adapter. If you are frequently on the road or in meetings and require non-interrupted computing time, keep an extra Asus Eee Slate EP121 pack handy and enjoy the true portability of your PC.

Help Tips:
For a new laptop adapter,if the system says not identify it. Generally, we need to update the BIOS of the laptop, and open the hardware automatic identification port of your laptop.

There are some knowledge about the new sony laptop battery, you can do it to best your new battery performance as the following:When you use it firstly, you need to full discharge till the laptop shut off, then charge it about 11 hours. Usually, new battery need to fully discharge and charge for three or four times, which can achieve the best performance.

About the new battery, power adapter should be cut off until the computer shutdown. please set the power management of your laptop: Property -> Screen Saver -> power -> Power scheme -> Portable / Laptop -> please cancel about low battery alarm and serious shortage of battery alarm when use the battery.

You could try to take out the HP battery from your laptop, and put it back again, repeat several times. Make sure that it isn’t a poor contact problem between the battery and your laptop.
You must first discharge your laptop battery until the computer turns off , then after 100% fully charged only once to calibrate it. After that, you can connect and disconnect the power adapter when the battery is at any charge level. In addition, after a period of time, you can fully charge and then discharge your battery only once to calibrate the battery power statistics under control of protection circuit, but this will not improve your time capacity of the battery.