Extensively tested and demonstrated by team ROTORWORKZ USA, these OUTRAGE XP packs are proven to be extremely powerful and are very cool after flights.  These batteries are surprisingly very well balanced right from the factory and are very compact resulting to one of the lightest batteries on the market.  With low price, low weight, high performance and 50% crash replacement within 6 months of purchase, these batteries are most highly recommended by top pilots.  Trextuning has posted the review of comparision between Outrage XP and Align packs for T-REX 500.  Check out why OUTRAGE XP is the BEST battery choice for T-REX 500 helicopters.  Align 6S 2600 25C vs OutrageXP 2500 25C