Is this battery okay for my phone?

[samnyc]

I bought a battery off a dealextreme for our phone. It runs at about 4100mV while our stock battery runs about 3700 mV. Will it damage my phone if I continue to use it?

The battery meter also runs at a constant 1%. I'm running intx 1.4, I'm not sure if its a rom or battery issue. Its likely the battery since the stock battery has no issues with this. This doesn't seem to trigger any of the battery save events so it hasn't hapered functionality, but is this anything to worry about?