Posts from Help us create the perfect combat robot. Auto-translated

For example, you could create miniature nuclear batteries, and that would provide enough energy. It's expensive, yes, but we need to believe in progress, not just in money, after all.

You don't need a lot of energy. The combat robot shouldn't be fighting. Less energy-intensive applications are preferable (and without combat lasers, of course, which are dangerous but have too low efficiency). A radio-controlled demolition unit, a sapper (yes, there are such things. At least, they are being developed), a "mobile first-aid kit," or something that disrupts the enemy's radio communications.

Or by improving the railgun, because it is a truly useful and cool thing.

Everyone loves the railgun.

Miniature nuclear batteries are not feasible today.
Radiation, guys!
And if training a human is cheaper, then why are combat robots of a similar configuration needed? However, robots for demining are a practical and actively developed concept.
Therefore, combat robots of the proposed configuration would only be useful as a demonstration of the capabilities of robotics. In general, the situation is similar to that of the Gauss rifle.

She is already 14 years old!

Come on, younger one.