Since you are in Alberta check out Greathobbies.com. They are a Canadian outfit and have better pricing than Tower when you take into accout US/Can. $ and customs. Also great service and free shipping with MAAC insurance. For in plane use you can install a Volt Watch which lights up different colors of LEDs depending on the voltage of the battery. Look for the green leds to be lit before and after each flight. If it gerts into the yellow then time to quit for the day. Cheap insurance. I tested them and found them to be very accurate.[8D]