Got new battery for asus ul50vt notebook because i thought the original was not functioning. the first time i charged it was fine. now i cant run the laptop unless the charger is plugged in, battery remains at "64% charging, plugged in". orange light sometimes starts blinking. battery wont charge. if i unplug charger computer dies

There is no replaceable CMOS battery on this model.
It is probably a rechargeable battery on the motherboard.
See Manual which only mentions the main battery pack.

http://dlcdnet.asus.com/pub/ASUS/nb/UL50A/T4786_UL50.zip

i think you are right it could be the inverter

If you are referring to the System Restore/Recovery procedure, you can find the info in the User Manual: http://www.asus.com/Notebooks_Ultrabooks/UL50Vt/#support_Download

Either your battery or the power cord has an issue. Does the battery ever fully charge and make the charging light disappear or turn green? If not the battery could be bad.

Try running the computer off the battery by removing the power cord. if the battery starts losing charging strength real quick then your battery is bad. I've see bad batteries that say they are 100% charged but as soon as you remove the power cord it gets down to 5% i a matter of minutes.

Try running the computer on just the power cord. If it stays on and lets you operate without any problem then the power cord is good. A good power cord will not charge a bad battery.

If the laptop does not let you stay on long with the power cord, then either the power cord is bad or the DC Power Jack where the power cord plugs into the laptop is bad. If either of them is bad they will not charge a good battery.

Check your DC Power Jack which is where the power cord plugs into the computer is bad. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

Either your battery or the power cord has an issue. Does the battery ever fully charge and make the charging light disappear or turn green? If not the battery could be bad.

Try running the computer off the battery by removing the power cord. if the battery starts losing charging strength real quick then your battery is bad. I've see bad batteries that say they are 100% charged but as soon as you remove the power cord it gets down to 5% i a matter of minutes.

Try running the computer on just the power cord. If it stays on and lets you operate without any problem then the power cord is good. A good power cord will not charge a bad battery.

If the laptop does not let you stay on long with the power cord, then either the power cord is bad or the DC Power Jack where the power cord plugs into the laptop is bad. If either of them is bad they will not charge a good battery.

Check your DC Power Jack which is where the power cord plugs into the computer is bad. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

Click Start/Control Panel/Power Options and set the power options to never for sleep or hibernating.

I recommend that you do a system restore to the entire paartition on your hard drive. With ASUS notebooks, this can be done by restarting the computer and pressing F9.

Make sure all settings are correct in Regional and Language Options esp keyboard.

the Dell AC adapter has a sensing pin so the bios can determine the wattage of the adapter. If the system cannot ID the adapter, the battery charger circuit is disabled. You'll need a functional DELL ac adapter to get the battery to charge

Better you first charge the battery for 16 to 17 hours and recheck the same. If problem persists, change the battery from where you bought it. that battery is faulty. And yes there is no need to install the battery from device manager. Just open the battery compartment and replace the battery with new one.