Originally Posted by HersheyP
It is 1.0 Amp
at 1 amp, it should be no more than 2, 2.5 hrs max. However, it's more likely you're you're not flying all of 2200mah, so probably only 1800mah or so being put back in...with that 1.52 hrs seems reasonable.
I'm betting that charger is putting out no more than .5 amps...