[johnklos]

I read this part:

> Replace your battery in 10 seconds without killing the power!

as a suggestion that you'd have four batteries total, and you'd have two that're fully charged, and you'd replace one battery, and within seconds you'd replace the other. Or at least that's how I'd do it.

I've recently read up about power management and battery charging, and want to make a charge controller than can connect two separate banks. I wonder how hard it'd be to change the IP5306 in the Hackberry Pi Zero to handle the two batteries separately.

[KennyBlanken]

And if you screw up which battery is which?

"Do things exactly right, quickly, or the device bursts into flames*" is not acceptable electronics design, even for something you intend to use yourself.

* do you really want to trust a generic battery's built-in protection IC?

[Forgeties79]

Maybe I’m being too generous but I feel like 99.9% of the people using something like this would do it properly

[II2II]

Now that I'm aware, sure. If I wasn't told, I would assume that they were designed so that a new battery could be swapped in while one battery remained inserted to maintain power (much like an old Thinkpad I used to own).

[Nab443]

.. until their curious child decides to have a look at it.

[outworlder]

If there's a capacitor... what about adding a switch to allow you to select which battery you are using? Then you can replace whatever you are not using without issue.

[samstave]

A mid-stream capacitor is holding enough charge for 10 seconds to allow indivdual swapping out -- and also this is meant? to mean that you can swap TWO NEW batteries in without having to shutdown/sleep/power interrupt - thus the 10 seconds.... that dope

[tedunangst]

It should definitely use the plural, batteries, if that's the intention.

[wanderingjew]

acktually, traditionally, 'batteries' referred to two or more cells. This keeps with the etymology of the word as an emplacement of cannon or guns. If OP meant a single cell, they should have written 'cell', not the singular 'battery'.