Transition from HDD to SSD: Calculation of the increase in battery life of a new laptop
I have an old HP TC4400 tablet and I was interested in how much battery life can be obtained when switching from HDD to SSD.
Immediately make a reservation that these calculations are similar to the average temperature in the hospital, but they also have some value.
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The answer surprised me. See an interesting picture:
Maximum - by 8.7%.
(with average use and assuming that the SSD does not consume anything. The formula for the relative increase in operating time is 100/92).
Another caveat: now I will compare atypical drives: a rather large SSD and hybrid HDD, but for the latter, the power consumption roughly corresponds to the usual HDD.
We take into account that typical power consumption SSD = 0.150 * 0.2 + 0.1 * 0.8 = 0.11 W
(20% active use and 80% passive, hence the SDD power data ).
Typically power consumption HDD = 0.05 * 2.2 + 0.15 * 1.1 + 0.8 * 0.8 = 0.915 watts.
(5% search, 15% work, 80% simple, hence the HDD power )
When taking into account the typical energy consumption of SSDs, the increase in operating time will be 100 / (92 + 8 * 0.11 / 0.915) = 7.57%
So, if your laptop battery lasts 3 hours, using an SSD will give you an extra 13.5 minutes of work.
For the sake of cleanliness, it’s necessary to say that the actual work on the laptop will be done about 20-30 minutes more , since the SSD is faster, which increases the efficiency of the work itself.
PS Of course, the analytical information on which I rely (picture with a link) from 2005, but if your laptop is not new (the distribution of energy among the components in new laptops is unknown to me, but I do not think that fundamental changes have occurred) and not on the Atom platform, then most likely my calculations will do.
Immediately make a reservation that these calculations are similar to the average temperature in the hospital, but they also have some value.
')
The answer surprised me. See an interesting picture:
Maximum - by 8.7%.
(with average use and assuming that the SSD does not consume anything. The formula for the relative increase in operating time is 100/92).
Another caveat: now I will compare atypical drives: a rather large SSD and hybrid HDD, but for the latter, the power consumption roughly corresponds to the usual HDD.
We take into account that typical power consumption SSD = 0.150 * 0.2 + 0.1 * 0.8 = 0.11 W
(20% active use and 80% passive, hence the SDD power data ).
Typically power consumption HDD = 0.05 * 2.2 + 0.15 * 1.1 + 0.8 * 0.8 = 0.915 watts.
(5% search, 15% work, 80% simple, hence the HDD power )
When taking into account the typical energy consumption of SSDs, the increase in operating time will be 100 / (92 + 8 * 0.11 / 0.915) = 7.57%
So, if your laptop battery lasts 3 hours, using an SSD will give you an extra 13.5 minutes of work.
For the sake of cleanliness, it’s necessary to say that the actual work on the laptop will be done about 20-30 minutes more , since the SSD is faster, which increases the efficiency of the work itself.
PS Of course, the analytical information on which I rely (picture with a link) from 2005, but if your laptop is not new (the distribution of energy among the components in new laptops is unknown to me, but I do not think that fundamental changes have occurred) and not on the Atom platform, then most likely my calculations will do.
Source: https://habr.com/ru/post/120293/
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