ORIGINAL: bruce88123
Definitely make sure your RX battery is fully charged. Charge it for 24 hours the first time new out of the box and monitor it carefully. If it goes low on you in flight the RX will reset and leave you w/o a RX for almost 5 seconds and a lot can happen (nothing good) in that time. A 6v pack or higher capacity 4.8v RX pack is becoming common with Spektrum systems in the field.
Up to 5 second reset isn't really 100% accurate. I can reset my DX7 Rx and it takes less than 1 second for the controller to see the Rx and gain total control. I've watched first hand as a person ran their battery pack a little to low for heavy load flying. The Rx reset and in no more than 2 sec's max he had total control back. Is this amount of time the norm? I don't know but a JR rep told me awhile back that it was the park flyer Rx that took the most time to reset. My recommendation as one Spektrum user to another would be the same as Bruce 6v or higher capacity 4.8v rx battery. I run 6v packs