5 ms·
Or, even better, the product of Watts and time (Watt-hours). mA-hours doesn't mean much if you don't know the battery's voltage.
by harg 6y ago
Or, even better, the product of Watts and time (Watt-hours).
mA-hours doesn't mean much if you don't know the battery's voltage.
- ginko 6y agoOr just use the actual SI unit Joule
- adtac 6y agoIt's not practical. Just like how you won't measure the distance between two cities in metres.
- mathfailure 6y agoHow is measuring distance between cities in metres impractical? That's exactly how sane part of the world measures it. Though kilo-, giga- and other prefixes for units may be used when needed (when rounding is acceptable for the purpose of reducing the number to reduce the overall length of words needed to describe the measure).
- adtac 6y agoI'm a part of the sane part of the world :) But it's more practical because if you know the Wh of a battery and you know the wattage of a power brick (simply V*I), you can quickly calculate the number of hours it will take to charge the battery from 0 to 100. Knowing the number of seconds isn't very useful to humans because battery charging is usually in the order of hours. Of course, machines should always use Joules internally.
- _Microft 6y agoThe SI system allows to use prefixes that take care of different orders of magnitude. 1 Wh = 3.6 kJ
- scotty79 6y agoStill it's easier to go with Wh than joules. We have a lot of intuition about watts and hours but not a lot abou joules.
- Ajedi32 6y ago1 Joule = 1 Watt-Second The problem is that our system of timekeeping does not conform to SI's prefix system. Not many people have an intuitive grasp of what a kilosecond is.