Hi I have the vivitar vivicam 8025 dont have my manual want to know how to charge my battery

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.

You can charge the battery in two ways.

1) Use the supplied battery charger. Take the battery out of the camera, put it into the charger, and plug the charger into a power outlet.

2) Use the supplied USB cable. Connect the camera to a powered USB port. Be aware that not all computer USB ports put out enough current to charge the battery.

You can download a copy of the manual from the manufacturer's web site at
http://www.vivitar.com/files_products/13/VC8025%20User%20Manual.pdf