Lenovo 21WV: $3 a year to run
This model (Computers) uses 17 kWh of electricity a year, which costs about $3 a year and $35 over 10 years at 21.0¢/kWh.
Energy use
17 kWh
per year
Running cost per year
$3
21.0¢/kWh
Running cost over 10 years
$35
Efficiency rank
1,045 / 1,748
Product details
| Type | Notebook |
|---|---|
| Battery capacity (Wh) | 75.0 |
| Available since | April 21, 2026 |
Compared with the average model (Computers), this one saves about $2 a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| ASUS FA707N | 17 | $3 |
| ASUS M1807H | 17 | $3 |
| DELL Dell Pro Precision 5 16S PW516265 | 17 | $3 |
| DELL MC16250 | 17 | $3 |
| dynabook PFR1# | 17 | $3 |
| Lanix XBOOK B15 | 17 | $3 |
| Lenovo 21XE | 17 | $3 |
| Lenovo (1) IdeaPad Slim 5 15Q8Y11 | 17 | $3 |
- 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