Kind of depends on your charger, is it possible for you to load a picture of your system: battery, atomizer/cartomizer/juice tank, charger?
Is your battery the screw on kind? Does it have threads?
The first few times I charged mine, I just placed the battery on the non USB side of the charger and pushed on it assuming it would click into place. It kept slipping off the charger but I thought you just had to not move it while it was charging. I never got a very good charge and it was super annoying. About a week or ten days in, I realized I had to screw the battery onto the USB charger and tighten it. Once I did that, I started getting great charges.
They're all different but I have an eGo and the battery blinks red when I first put it on the charger. The charger light is constant red. As it begins charging the light on the battery stops blinking and stays constant red. The indicator on the USB has a red light until it's fully charged, then it turns green.
Once the charger light turns green, the battery is fully charged, disconnect it and put an atomizer/clearomizer/tank on. Press the button 5 times and it should be constant red. Hold the button down as you drag in on it and let the button go when you stop breathing in.
Some eGos are variable voltage. Press the button five more times, my light turns purple this is the medium setting. Press it 5 more times and the light turns blue which is the highest setting.
There is so much to learn... but it's worth it.