Aspire cf vv / joytech charger

Hello, I just have a quick question about charging my aspire cf vv. I bought the cf vv a few days ago and I've been using the charger I bought for my old battery. It's supposed to be a "universal" charger but I'm not sure if it's damaging my battery or not. The charger is called a "joytech". It seems to work but I want to make sure it's not damaging my aspire battery?
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