That charger is a POS, I know, I had one, gave it away and spent $50(although they now are $10 more) for a Thunder charger AC680 that charges the batteries quicker and safer.

The pack that came with my plane was a 3300 Mah, so 3 amp takes longer, and I charge mine at 3.5 amp.

Also the 3300 25C Gen Ace packs are a great buy for the plane, you can get up to 17 minute flights with one of those, and they are 1/3 the cost of the eflite pack.  I got both from Hobbypartz.