This is very interesting. However, I suspect that for many people, the percentage of time required to recharge is not that large. For instance, many people work 50 or 60 hours a week. And even when they are not working, they might be mostly doing things that would not be considered recharging, like housework or commuting. My personal recharge percentage might only be around 5%. So I might be biased, but I would guess it would typically be around 20%, at least for people who are motivated like effective altruists.
As for the question about whether timesaving interventions are worth it, I have done a lot of calculations for my own personal decisions. To my surprise, I found that many things make sense even if you value your time at order of magnitude 1 dollar per hour or less. They include things like dishwasher (you can get a countertop version if you are in a single person household), having laundry in your apartment (you can get a combination washer dryer that uses a standard outlet-this actually saves you money even when you count the increase in rent due to the lost square footage), having a second monitor, using voice recognition software (this is one of the biggest timesaving interventions), using a hands-free phone so you can do housework while on the phone, having a wireless headset so you can listen to things like TED talks while grooming, etc.
This is very interesting. However, I suspect that for many people, the percentage of time required to recharge is not that large. For instance, many people work 50 or 60 hours a week. And even when they are not working, they might be mostly doing things that would not be considered recharging, like housework or commuting. My personal recharge percentage might only be around 5%. So I might be biased, but I would guess it would typically be around 20%, at least for people who are motivated like effective altruists. As for the question about whether timesaving interventions are worth it, I have done a lot of calculations for my own personal decisions. To my surprise, I found that many things make sense even if you value your time at order of magnitude 1 dollar per hour or less. They include things like dishwasher (you can get a countertop version if you are in a single person household), having laundry in your apartment (you can get a combination washer dryer that uses a standard outlet-this actually saves you money even when you count the increase in rent due to the lost square footage), having a second monitor, using voice recognition software (this is one of the biggest timesaving interventions), using a hands-free phone so you can do housework while on the phone, having a wireless headset so you can listen to things like TED talks while grooming, etc.