Maybe your demands are higher but it's 2000mAh through the 9V's (though not what one 9V limit might be), 1000mAh through 12V, and 450mAh through 18/24V, and fully isolated according to one of the reviews. Also not sure why you wouldn't. It's effectively one of those uninterruptible power supplies that will last hours instead of a few minutes
This even cheaper one for $30 is fully isolated, so i imagine the other lithium battery power supply is as well
https://www.amazon.com/lotmusic-Iso...1d-aff1-42c17b5dadff&pd_rd_i=B09MTKLN62&psc=1
According to the CIOKS D7 product specs, it looks like the $70 Solutek outperforms it in every metric, including output.