What is the best solution to power up two 5292 buggy motors?

Question

I have two buggy motors, 5292 like this:

I see powering each separately and using two IR receivers soon triggers the receivers' protections and the motors are stopped.

My aim is not speed, I see battery options powering with 7.2-7.5V instead of others powering with 9V, obviously the latter ones performs faster, but I try to have a safely working setup, without burning components.

What is the best way to power up them? Is there a way to avoid using Android apps and bluetooth, or EV3 stuff, by using an IR setup at all? Is it possible to avoid SBicks and BuWizz? If not, are these reliable? I see people talking about LiPo instability. Is it that fire-hazardous?

Having in mind that Lego has overheat protections that often stop the motors on load, first question would be: is there a setup with Lego's LiPo battery to avoid the known hiccups behavior, without bypassing the protections?

And I have a side question: how to control a buggy motor using its box 54734, that come together in the 8287 set, with an IR Receiver? Mine simply does not power up the IR. I've tried all Lego Power Functions extension cables, the IR receiver doesn't lit.

Update

I have a RC power unit now:

A thing that nobody tells ~ and I've searched a lot ~ is that steering goes 45°, unlike the servo motor that goes for 90°.

Building big means heavy (I try the agrof's class 1 buggy), so I've used multiplication twice in order to achieve the same 90° with the RC unit. This powered down the steering so it could not work when not running. A crackling sound is heard from it too, when tried. The multiplication is like this:

→ → →

agrof's steering is pretty complicated to change in order to use a 20T instead of 12T due to the steering wishbones and link positioning, as the 20T is bigger in diameter. Also, don't know if it is enough.

Now, similar to Michael Verschaeve's idea, the 45° steering could be used to action a switch in order to steer using a servo motor, but seems pretty weird to me.

Answer 1

The Lipo, thermal protections kicks in when consuming about 1A, while the buggy motor will consume 1.3 A when loaded but not stalled. So for two buggy motors, best would be 3 lipo's in parallel but perhaps you can get away with 2. The V1 receiver, only 850 mA before the protection kicks in, so not enough to power 1 buggy motor, let alone 2. The V2 receiver, 1.5 A before the protection kicks in, enough to power 1 buggy motor...

What might be a solution is having the V1 receiver control a medium motor or servo which mechanically switches a 8869 control switch which in turn switches the buggys on and off...

As for the old battery box, I think the reason you don't get it to power a V1 receiver is because power functions have two pairs of wires, a control pair and a pair that gives a constant voltage.

M,L and XL motors only use the control pairs of wires.

A servo uses the voltage pair to keep its position and the control pair to determine the position.

A receiver uses the input voltage pair to power itself, ignores the input control pair, forwards the voltage pair to the output voltage pairs and places control voltage on the output control pairs as it's instructed by the remote.

When using PF to 9V conversion cables, I think only the control pairs get connected, never the voltage pairs so the receivers cannot be powered by 9V battery boxes or cables...