The only thing that will draw any appreciable power is the electric blanket. A quick search on them showed me ones that ran from a meager 4w to 60w. A 60w one would draw about 5 amps. That might be close to the output of some of the smaller quad's stators. Your stereo would likely draw between 1 amp at normal volume and maybe 2 amps cranked up. It would have to be a fairly powerful one to draw 5 amps at ridiculous volume settings. a 4w CB might draw about 2 amps at max. A legal output of 4w am or 12w SSB would only require about 0.3A at 100 % efficiency, so giving it 1 amp to power the transmitter should be more than enough. Stereo cranked, electric blanket on and transmitting on the CB all together would likely max out an older small quad's stator. Newer quad's generally have more output than the older ones . I've seen quotes of up to 35 amps for some of them . Most forums mention 15 to 25 amp output on ATV stators, so I can only guess that older small quads would likely have outputs of 5 to 10 amps and newer ones between 15 and 35 amps. At 10 amps output a stator would be delivering about 140 W to the system. Even at 5 amps there is 60 watts available to power everything and charge the battery. You really don't need a monster battery to deliver power for even the most heavily accessorized quads when the motor is running .