Lenovo 21KV: $6 a year to run
This model (Computers) uses 26 kWh of electricity a year, which costs about $6 a year and $55 over 10 years at 21.0¢/kWh.
Energy use
26 kWh
per year
Running cost per year
$6
21.0¢/kWh
Running cost over 10 years
$55
Efficiency rank
1,345 / 1,748
Product details
| Type | Notebook |
|---|---|
| Battery capacity (Wh) | 90.0 |
| Available since | May 31, 2024 |
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Lenovo 21RS | 26 | $6 |
| Lenovo Legion 5 15IRX10 | 26 | $5 |
| ASUS H7606W | 26 | $5 |
| DELL XPS 16 DX16263 | 26 | $5 |
| HP HSN-I64C-8 | 25 | $5 |
| ASUS FA707 | 24 | $5 |
| Lenovo ThinkBook 16p G6 ADR | 24 | $5 |
| Lenovo 21XG | 24 | $5 |
- 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