I was thinking that the Lithium-polymer battery was the reason it is hot. Meaning I thought maybe it runs hotter that Lithium ion. I don't know though. However I never came across hot battery behavior on any device I own. Does that not make sense. I ask because I do not understand you statement saying another battery would not run cooler. I mean, the battery in the Hugo is cool, so I question your logic. I might be wrong of course, so please don't misunderstand me.
The Mojo battery certainly produces heat when it charges. However I think possibly the heat when playing (and not charging) might be heat from the battery due to discharge. Therefor it you install a cooler running battery, there will be no cut out issues in hot weather.
That's why I think it might be an idea to have the physical and electronic specifications of the Mojo battery.
The reason you have never come across "hot battery behavior" in other devices is nothing meaningful to do with the
battery. It's about the demands of the device, its ability to dissipate heat, and what thermal management it imposes. For example, if an iPhone gets too warm it'll first throttle is CPU/GPU behavior down to lower power draw (and thus reduce generated heat) and, if that doesn't get things under control, it'll shut down with a thermal warning message. By design, it's
electronics prevent the temperature from rising beyond a certain point (i.e. the thermal safety threshold of either the battery, or one or more electronic components in the unit).
You might find a VERY SMALL temperature difference between LiON and LiPo with a good thermometer, if everything else in the system you were measuring were equal. But it won't be, since the internal resistance of the battery will change - among other things.
As to Hugo being cooler ... it has a larger surface area, so even if everything else was equal, of course it
would run cooler (larger heatsink mass, greater area to dissipate heat from, which, given the same thermal load will result in lower temperatures). If you put Mojo into the Hugo case, it'd run cooler too (or would, at least, take longer to saturate the heatsink/dissipation capacity of the casework).
You're missing the physics at work here - and saying "cooler running battery" repeatedly won't change them. There aren't "cooler running BATTERIES" as such ... just batteries that are operated at lower thermal limits. No matter what specs Rob gives you, they're not going to change the laws of physics. And if you want a cooler running Mojo, then you want higher impedance cans (lower current draw, slower discharge rate), or you'll have to persuade Rob to come up with a version that limits current draw/charge rate artificially - which means trading off runtime or performance.
And all of that ignores the fact that it's not that the battery is generating heat, its that the unit is as a whole ... and that it can operate, safely, at higher temperatures than other devices because it has a battery than can safely survive high-temperature operation. That's ALL the temperature spec on a battery means.
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Incidentally, there is no issue with my logic ... just your apparent non-understanding of physics, chemistry, electronics and thermal management in modern devices. You're looking at the wrong things, drawing the wrong conclusions from them and then taking that as the basis for your argument.
