Replaceable batteries are coming back in the EU though due to the battery regulation (EU) 2023/1542 which requires portable batteries to be removable and replaceable
Replaceable batteries are coming back in the EU though due to the battery regulation (EU) 2023/1542 which requires portable batteries to be removable and replaceable
Yes slow charging is one factor to prolong battery life. You can even go down to 5w or less. But another important factor is not having your phone charged at 100% for long durations, because at high voltage the battery degrades faster. So don’t leave your phone plugged in when it’s fully charged, try to keep it between 30 and 80% all the time for maximum lifetime
Correct. Convection would just annihilate your insulating effect
The water creates a better way to transfer heat from the container to the freezer because it has direct contact with the container and replaces the air around it. Yes the water needs to be cooled too, but still the process is way faster because air really is a good insulator for heat. This is why insulating materials for houses e.g. always try to maximize air content (foam, glass wool, styrofoam)
That’s a basic rule that can be applied to lots of things: If a company offers a lot of different products or one product that can do everything, usually none of those are really good. Typical example would be a restaurant that serves everything from pizza/pasta, asian cuisine/sushi to steak, burgers and so on
Replaceable batteries are coming to the EU in general, at least for portable devices, via the EU Batteries Regulation, which is in force already and requires all portable batteries to be easily removable and replaceable by the end user from 2027