[KaleunMarco]

Originally Posted by pabbi

Maybe this helps, found this inside my bookmarks.
It's written by Ducimus

thank you for re-posting Ducimus' comments.
it makes for confirmation of some of the results i have discovered with more recent testing, however all of my testing is with US boats. and i have always thought that there are two code sets for SH4, one for the Uboats which is a direct descendent of SH3 and one for the US Boats which is more of distant relation to SH3.

there is definitely a correlation between engine power and battery recharge, although it is not consistent and not arithmetic. which means that you can increase your engine power if you want to recharge faster however, doubling the engine power will NOT halve your re-charge time.

there is also an unexplainable glitch in the Ubi recharging algorithm because when engine power reaches a certain level, running at flank speed will dramatically increase your recharge time.