Hi I have the E-flite Blade CP as well I know I was charging the battery the same way I fond out you need to charge it at about 0.8 it takes about 45 to 50 minutes to charge the battery you should run it till the heli dos'nt throttle up of the ground I got that from the Hobby shop were I got mine at I charge my E-flight with the HOBBICO QUICK FEILD CHARGER MKII
I put the AMPS set to 0.8 it takes about 50 minutes to charge the battery I get about 15 minutes flite time good luck hope this helps you Bill Clark