fullsquare

but can both of them lose?

4-5V is state of the art and pushing it there or beyond that gets very tricky very quickly. pure water has electrochemical window of 1.23V, but you can go a bit over that because at low overvoltage water splitting is slow at most electrode materials. that's why lead battery can have 2V per cell and will generate hydrogen when charged much over nominal voltage

storage of heat is also very cheap compared to some other options and can just be using ground around boreholes, especially considering that most of residential energy use is in form of heat. if you have a hill that you don't need you can even put an artificial lake on top of it

there's a speciality resin (that new material) in that battery. resins are nonrecyclable. i don't think it can be 4x cheaper per kg than LiFePO4 battery because of that material

some of you people itt have never imagined that there could be something like a research dead ed and it shows

use of water as a solvent limits maximum voltage

wanted to use water to get electricity anyway for a laugh? we have a tool for that: it's called STEAM TURBINE

or you could go with sodium battery, or LiFePO4, or thermal energy storage at this scale. hell maybe even pumped hydro

there's also another typo (ctrl f accent -> accident)

suspending funding to an institution that designs your nukes is definitely a choice

just put butter in the toothpaste tube smh

this advice is specifically about sulfuric acid. it's denser than water, so if added to it it will sink diluting itself along the way, while also heating water around and making it float to the surface. if done opposite way, water won't mix immediately because of large density difference so neutralizatio heat will be deposited on surface between these two boiling water and throwing acid around. this matters less with other acids because less heat is deposited, and in some cases acid is less dense than water. but if you stir the acid quickly, you can do it either way as long as you control temperature. this also is the case when you need to mix two different acids

tldr you can do whatever you want as long as you know what are you doing

e: i've checked and heat of dilution is greatest for sulfuric acid, liquid HF is similar per gram, gaseous HCl and HBr are half of that per mol, other common acids 5-10x less esp as aqueous solutions and not neat. also the same happens when diluting acids with other solvents, like alcohols or ethers, these might be even worse because they boil at lower temperature

chips and bare pcbs are fabbed in taiwan/sk as you could expect, but soldering and further steps happen in poland. here you have some photos from inside their tiny factory https://www.komputerswiat.pl/nauka-i-technika/w-polsce-znajduje-sie-jedyna-w-europie-fabryka-pamieci-jest-co-podziwiac/x4kce8e

at least they haven't crammed ai into it (so far, i guess)