Compare models
Spec
Lenovo B51-30
Lenovo IdeaPad 300-15IBR
Summary
LB Score
17
19
★
Value
14
22
★
Price
$137
$99
★
Use class
Budget Surf
Budget Surf
Screen
Diagonal
15.6
15.6
Resolution
1366x768
1366x768
Panel type
tn
tn
Brightness
—
—
Screen quality
45
45
Processor & graphics
CPU score
7
7
GPU type
dGPU
dGPU
GPU score
5
5
GPU rating
2%
2%
Memory
RAM (max)
—
—
RAM type
DDR3
DDR3
Storage
Storage (bus)
—
—
Battery
Capacity (Wh)
50.0 Wh
50.0 Wh
Autonomy (est.)
1.7 h
1.7 h
Chassis
Weight
2.50 kg
2.30 kg
★
Type
Laptop
Laptop
Release year
2015
2015
Verdict
Best overall: Lenovo IdeaPad 300-15IBR · wins 10 of 10 parameter rows
Why Lenovo IdeaPad 300-15IBR over Lenovo B51-30
- Market popularity: 0.10 vs 0.02 (+0.1)
- Value: 22 vs 14 (+7.9)
- Mobility: 19 vs 14 (+5)
Is the $38 premium worth it?
Over 2 years, Lenovo B51-30 costs ≈ $0.6/mo more to own than Lenovo IdeaPad 300-15IBR — extra depreciation $0.4/mo plus $0.1/mo the $38 premium could earn at 4.21%/yr (US Treasury 3-month bill, as of Nov 2, 2026).