@hittman, I have a fairly old stabwood mod by JM Mods (Poland) that has a YiHi SX350J v2 chip. It works great. I have not witnessed any battery drain with mine.
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Coming from DNA devices it did take me a minute to familiarize myself with the YiHi menus and setup. After a bit, it was a breeze.
FWIW, I also have a few old iPV D3S 80w mods. Those have YiHi SX150H chips. I've never had any issues with battery drain in those.
VA uses many YiHi and DNA chips in their mods. There is a very loyal following in the private Vicious Ant FB group. I've been in that group for some time and do not recall seeing a single post about battery drain. I am fairly certain
@Daniel Forsyth is also in the group.
If I wasn't more into mech squonkers I would have scooped that Vanguard up in a fraction of nano second. I mean, $130 is a big time steal for a Vicious Ant stabwood mod. Especially for one that is still listed at $700 (per my previous post).
ETA: The VA Vanguard has a SX475J chip.