don't worry dude, it's your first build.
I've done 5 at this point. My go to battery is this guy
Upgrading from 6v to 12v, or 12v to 18v makes a huge difference, especially if the car has dual-motors; then they haul ass. At 18Ah the batteries can last through multiple kids taking turns without issue. In real-world events I've had each powerwheel run at full power (sliding/drifting) for about 4.5 hours before it starts to show signs of slowing, then another 2 hours before it's stone cold dead.
It comes down to what you want to achieve and how much work you want to put into the car (i.e. time/money). For me, I needed a modular system where I could easily remove the same battery from each car (due to theft of property when left outside), and ease-of-use (one type of battery, one type of charger).
The brushless motors and LiPos sound cool as fuck but that's until you destroy the stock gearbox and wheels. I have a toddler-sized ATV that needs to be re-habbed after the extra power destroyed the axle-joint (it was plastic, needs a metal plate bolted on to get it working again).
Battery I use here. Mine was about $10.00 cheaper when I bought it three years ago.
ExpertPower EXP12180 12 Volt 18 Ah Rechargeable Battery with Nuts and Bolts https://www.amazon.com/dp/B00A82A3RK/ref=cm_sw_r_cp_apa_KZptybMN92M0G
It takes two of these. SUPER easy to do. I just did two of them this week Hit me up with any questions.
Thanks
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Can you explain this battery?
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https://www.amazon.com/gp/product/B00A82A3RK/ref=ox\_sc\_act\_title\_1?smid=ATW4RRWB3JMSM&psc=1
btw amazon has the battery cheaper by itself at about 40usd versus H.F. selling for ~60usd
https://www.amazon.com/ExpertPower-EXP12180-Rechargeable-Battery-Bolts/dp/B00A82A3RK/
Thanks a ton, I'm really starting to better understand this stuff now! So for example, lets take this battery (https://www.amazon.com/ExpertPower-EXP12180-Expert-Power-Lead_Acid_Battery/dp/B00A82A3RK), at max charge, with no input from solar, it would have a total storage of 360 amps, correct? and say I have a fan that uses 2 amps per hour, it could run for 180 hours? And say I had a fan that ran .12A (12v x .12 = 1.44 watts), it could run for 3000 hours? (360/.012)
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alternatively, would it be correct to also be able to say this?
if it would hold 360 amps at max charge, and it is a 12v battery, could you also say it holds at max of 4320 Watts? (360Ax12v)
A bass port is the same as a vented enclosure. the 4.5khz crossover will work. D class amps are industry standard for any sound amplification work. Literally everywhere where power, volume, or price is an issue, people use D class. T class aren't as powerful, and AB aren't efficient enough for battery operation.
As far as a battery, this one has 18ah way more than you need but should allow you to run it for quite some time. Or you could go with the 7ah version it won't last as long but it is smaller, and it is about 1/4 of the weight. Any 12V power supply will work to charge it as long as you put a power switch somewhere between the battery and the amp when you wire it. If you are not comfortable/don't have the tools to splice the power cable correctly, don't do it. Blowing up gear, possibly causing fires, and/or electrical shock is not worth it. It's really easy to do, but if you screw it up, it can be disastrous.
I'm actually intrigued to see how this turns out, on paper it should have an output comparable to that of a commercial loudspeaker in a much smaller package, with the added bonus of being battery powered.
This I believe is the setup I will follow. Since my needs are singular in nature I have determined that literally the only thing I want is a breeze. At the end of the week if I haven't found a better alternative then I will follow through with this purchase.
For about 50$ My needs will be met. Simple, clean setup with ultra mobility and charging options.
Thanks for all the help guys. I appreciate it!
12v 18ah battery, 150W inverter (could go lower), and a charge controller for the battery that can get attached to the cig lighter (which should only have power when the car is on)