What advantages would power armor have over tankettes? Somebody upthread mentioned indoors mobility, but to have enough armor to be useful against even .50 BMG, let alone basic anti-armor rockets like the RPG-7, would likely render the suit too heavy to use on staircases or buildings with subfloors.

Could current plutonium battery technologies be used in power armor, or are the shielding requirements just too great?

I'll say it again: tankettes

Weren't the Japs using exosuit type rigs at Fukushima to allow clean up crews to carry more weight?