Yea.. its called clamp diodes. designed to protect the inputs and outputs, and they all go back to the main rail. So it makes sense.
I think I know this guyAbout 15 years ago, I drove a fellow home (my job at the time was "professional designated driver") whose company had developed a method of building lead-acid batteries which, though having completely traditional chemical composition, had greatly improved energy density by reason of using "foamed" (extremely porous) lead electrodes, which naturally had vastly greater surface area than the traditional simple lead plates… or so he proudly claimed, at least. It would be interesting to find out if they ever succeeded in commercializing that. You could in theory run your Portable for twice as long with minimal or no alterations.
Having that intelligence offloaded to the battery itself is actually to our benefit. That way your not fighting against the internal charge controller when changing battery chemistry types and using your own BMS.Oh yeah, I forgot about that. Has anyone been able to reverse engineer that "intelligence"?
If you are doing switching with this relay from charge to discharge, vice versa. this really needs to be a series pass transistor set to do this.It's probably possible to do that. I've also thought of incorporating a mosfet or transistor somehow. The old relay part "TX2-5v" has a 4ms release. The new one "EC2-5NU" has a 2ms release. I doubt that will make a difference at all but who knows. I'd like to fix that but I really don't see it as a major detractor given that there essentially are no other options for this little laptop. Right now if it's running and you yank the charger it resets.