ORIGINAL: DadsToysBG

To be honest even the techs at Horizon didn't have a good reason for the 4.8 battery being included. Now no radio system sold has a battery with it.
(2) When they first released their 2.4 the egg heads that designed the system never thought that people would let their battery's get to low. Too them it was a nobrainer that you keep your battery's in top condition. When they saw that the consumer was not doing this they went back and redesigned their receivers with a quicker reboot time.
(3) Yes you can. All new radio's are X that will work with the older S. All the new receiver's are X that will work with S radio's. If you fell it is important you can upgrade. As time passes all the JR/Spektrum will be X as older receivers and radio's are retired. If you haven't had any trouble as I haven't there's no need for the upgrade.
I have a X radio now but I'm still using the old S receivers that have the old reboot time.
I fly GS planes and have learned about the power demands of these type of planes. I have both planes out of the trailer and I am in the process of re wiring them and adding a power panel to get better power distribution to the servo's.
It's a continuing learning process and improvement and as I learn more I make the changes. Dennis