Need to Know how long it take to charge Battery

It is hard to help find a solution for you without more specific info on this. It says you have purchased this(what?) product in the 60w version and it(what?) came with no manual. I would help you figure out how to connect the battery charger(what type?) to the back(of what?) or to the wall socket. Do you turn on or off the switch on the back(of what?) while charging. AND you WOULD APPRECIATE a CORRECT answer. Please< I need you to help me understand what you are asking before I can help you. I am here to help. If it uses a backup battery like a pc, you don't charge it. If it(whatever it is) uses a battery for power, you probably plug it into the wall overnight without turning it on to charge.

There is a known issue with the BIOS bug in some of the Acer model that it prevents charging. Trying upgrading the BIOS from Acer online to the latest version following the online instructions.

There is a known issue with a BIOS bug in some of the Acer models that it prevents charging. Try upgrading the BIOS from Acer online support to the latest version following the online instructions.

There is a known issue with a BIOS bug in some of the Acer models that it prevents charging. Try upgrading the BIOS from Acer online to the latest version following the online instructions. But you might have to borrow a charged battery from someone first if your battery is already completely dead now.

It's looks like the battery was already completely dead.

A replacement battery may be the good choice:

http://www.laptopbatteryretail.com/acer-aspire-5735z-battery.html
http://www.battery-center.net/acer-aspire-5735z-battery.html

First off, you can download a PDF version of the manual from the manufacturer at: http://www.vivitar.com/files_products/13/VC8025%20User%20Manual.pdf
If you don't have a PDF viewer, you can download one from: http://www.foxitsoftware.com/pdf/reader/ (just click download under the free version)
For your convenience I've pasted the relevant information about charging the batteries from the above manual:
Please charge the battery as below 2 methods: A. Charge with USB cable Insert the lithium battery into your camera correctly, and connect your camera to computer with USB cable. The red LED of camera will be light on indicating that your camera is in charging status, the LED willbe off when charge full.
B. Charge with supplied charger Your camera is supplied a compatible charger for you, you are only required to put the battery into charger and charge the lithium battery directly from electrical outlet

Please leave feedback if this was helpful. Thanks.

The battery is fully charged when the gauge reads zero.

The meter is telling you approximately how much current (amps) it is sending to the battery. When the meter moves all of the way to the right it is charging as hard as it can (that would be 6 Amps) which indicates that the battery needs a lot of charging. As the battery becomes saturated with charge, the meter will move toward the left. As the battery become charged, the unit automatically tapers off the current. The meter can indicate as little as little as zero Amps, meaning it is not charging the battery at all - which is the case when the battery is powered up, but isn't even connected to the battery. If it reads zero when it's connected to the battery, the battery is broken and can't be charged.
Since this charger is rated at 6 amps, it will indicate about 3 amps when the battery is about done. It won't normally go to zero because those 3 amps are getting wasted just heating up the battery.

If you look at the meter, the charge meter of 100% is slightly above the 2 amp mark so it is confusing. because it says the charge represents the amont charged and the amp meter shows when there is no draw on the charger. so if the battery shows 2.5 amp on the amp meter, it's showing 100% charged. but yet they say it should go to zero on the amp meter, which would mean about 150% charged. i think everyone is scared of blowing up or damaging their batteries because the instructions manual is quite contradictory and confusing. well apparantly, they have several versions of this model to make it more confusing, but here's a pic of what i have.
http://www.northerntool.com/images/product/zoom_images/1677820.jpg

ok, as i was looking for manual online, it is more detailed than the one in box. it now explains this in picture detail. thank you schumacher.
here's the updated manual:
http://www.batterysales.com/downloads/SE-82-6.pdf

hope this helps.