the only other thing it could be is if you have the EPA on your radio turned down. they need to operate at 125% throttle for the spektrum series.

HobbyCity has some of the best most economical lipos made. their Zippy flightmaxx packs are as good as my thunderpower and enerland packs.

https://www.hobbycity.com/hobbycity/...0mAh_6S1P_30C_

these Turnigy packs look like they are just re-badged flightmax packs with 10AWG wire. Alot of people are already saying they're just as good as the flightmax packs so you might wanna get a few while they last. I've seen stock levels drop 300-400 batteries in a day because of their prices.

https://www.hobbycity.com/hobbycity/...idProduct=9183