Samsung SM-T638U: $1 a year to run
This model (Computers) uses 4 kWh of electricity a year, which costs about $1 a year and $9 over 10 years at 21.0¢/kWh.
Energy use
4 kWh
per year
Running cost per year
$1
21.0¢/kWh
Running cost over 10 years
$9
Efficiency rank
13 / 1,748
Product details
| Type | Slate/Tablet |
|---|---|
| Battery capacity (Wh) | 28.1 |
| Available since | August 31, 2022 |
Compared with the average model (Computers), this one saves about $4 a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Samsung SM-X117U | 4 | $1 |
| Apple A3595 | 4 | $1 |
| Apple A3596 | 4 | $1 |
| Samsung SM-X308U | 4 | $1 |
| Ceibal H9190L | 4 | $1 |
| MAXHUB XPT34M | 4 | $1 |
| Samsung SM-X110 | 4 | $1 |
| Lenovo TB305FU | 3 | $1 |
- Refrigerators
- Freezers
- Washing machines
- Dishwashers
- Tumble dryers
- Room air conditioners
- Dehumidifiers
- Water heaters
- Electric cooktops and ranges
- Televisions
- Air purifiers
Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology