So this is my first quad copter, just got it for Christmas. it was a lot of fun for about three batteries then one of the motors quit working (of course). i was told this was a hobby grade quad so in my mind it should last longer than that. i still need to contact horizon hobby to see if the will cover it. I have a few questions on the minis. 1) Are the little motors so fragile that a semi hard crash could cause it to stop working. 2) is their any motors besides the manufacturer Blade that would work that are better made or a slight upgrade. Are motors that size universal with connectors and compatible with the motherboard. 3) the spare battery i got for it is not the same exactly. the one it came with was a 1s 3.7v 150mah 25c and the spare they sold to me is a 1s 3.7v 150mah 45c. i think the are compatible as much as i know about batteries but not sure what the last number means. thank you for reading this and any help is greatly appreciated.