Lenovo 21R3: $3 a year to run
This model (Computers) uses 12 kWh of electricity a year, which costs about $3 a year and $26 over 10 years at 21.0¢/kWh.
Energy use
12 kWh
per year
Running cost per year
$3
21.0¢/kWh
Running cost over 10 years
$26
Efficiency rank
537 / 1,748
Product details
| Type | Notebook |
|---|---|
| Battery capacity (Wh) | 58.0 |
| Available since | May 28, 2025 |
Compared with the average model (Computers), this one saves about $2 a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Acer TravelLite TL24-54M | 12 | $3 |
| Acer N24C12 | 12 | $3 |
| ASUS M1502X | 12 | $3 |
| ASUS B5605CAA | 12 | $3 |
| ASUS B9406CAA | 12 | $3 |
| ASUS CX1505CKA | 12 | $3 |
| ASUS X1704Z | 12 | $3 |
| DELL Dell Pro Essential 14 PV14265 | 12 | $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