Lenovo 21QX: $2 a year to run
This model (Computers) uses 12 kWh of electricity a year, which costs about $2 a year and $24 over 10 years at 21.0¢/kWh.
Energy use
12 kWh
per year
Running cost per year
$2
21.0¢/kWh
Running cost over 10 years
$24
Efficiency rank
441 / 1,748
Product details
| Type | Notebook |
|---|---|
| Battery capacity (Wh) | 58.0 |
| Available since | March 10, 2025 |
Compared with the average model (Computers), this one saves about $3 a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Acer TravelLite TL44-53M-G2 | 11 | $2 |
| Acer Aspire Pro AP14-55 | 11 | $2 |
| Apple A3375 | 11 | $2 |
| Apple A3185 | 11 | $2 |
| ASUS M1502U | 11 | $2 |
| ASUS E1504G | 11 | $2 |
| Ceibal H729AE | 11 | $2 |
| Framework FRANQC0000 | 11 | $2 |
- 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