Does your x13 drone not fly for as long as it used to if it39s losing height soon after take off or feeling a bit sluggish even on a fresh charge there39s a good chance that it needs a new battery this replacement syma battery is just like the one supplied with the original drone and fixes into place just as easily it39s great if you want to charge up two batteries at once and double your flight time switching them over half way through it never hurts to keep a spare