Product comparison · 2 laptops

Lenovo T420 + ThinkPad Mini Dock Series 3 (EU) vs Lenovo T520 + ThinkPad Mini Dock Series 3 (EU)

128specifications compared
13differ
115identical
17known for one product only

Key differences

Display diagonal
- T420 + ThinkPad Mini Dock Series 3 (EU):35.6 cm (14")
- T520 + ThinkPad Mini Dock Series 3 (EU):39.6 cm (15.6")
Display brightness
- T420 + ThinkPad Mini Dock Series 3 (EU):200 cd/m²
- T520 + ThinkPad Mini Dock Series 3 (EU):220 cd/m²
Contrast ratio (typical)
- T420 + ThinkPad Mini Dock Series 3 (EU):300:1
- T520 + ThinkPad Mini Dock Series 3 (EU):500:1
Optical drive type
- T420 + ThinkPad Mini Dock Series 3 (EU):DVD-RW
- T520 + ThinkPad Mini Dock Series 3 (EU):DVD±RW
Discrete graphics card
- T420 + ThinkPad Mini Dock Series 3 (EU):Yes
- T520 + ThinkPad Mini Dock Series 3 (EU):No
Discrete graphics card model
- T420 + ThinkPad Mini Dock Series 3 (EU):Intel® HD Graphics 3000
- T520 + ThinkPad Mini Dock Series 3 (EU):Not available
USB 2.0 ports quantity
- T420 + ThinkPad Mini Dock Series 3 (EU):3
- T520 + ThinkPad Mini Dock Series 3 (EU):4
Battery life (max)
- T420 + ThinkPad Mini Dock Series 3 (EU):9 h
- T520 + ThinkPad Mini Dock Series 3 (EU):7.7 h

Side by side

Differences highlightedShow differences only

Comparison of T420 + ThinkPad Mini Dock Series 3 (EU), T520 + ThinkPad Mini Dock Series 3 (EU)
145 specifications	A Lenovo T420 + ThinkPad Mini Dock Series 3 (EU)View product	B Lenovo T520 + ThinkPad Mini Dock Series 3 (EU)View product
Display3 differ
Display diagonalDiffers	35.6 cm (14")	39.6 cm (15.6")
Display brightnessDiffers	200 cd/m²	220 cd/m²
Contrast ratio (typical)Differs	300:1	500:1
Storage1 differ
Storage mediaKnown for one	Unknown — not stated by the source	HDD
Number of HDDs installedKnown for one	Unknown — not stated by the source	1
Optical drive typeDiffers	DVD-RW	DVD±RW
Graphics2 differ
Discrete graphics cardDiffers	Yes	No
Discrete graphics card modelDiffers	Intel® HD Graphics 3000	Not available
Audioidentical
Built-in microphoneKnown for one	Unknown — not stated by the source	Yes
Networkidentical
Top Wi-Fi standardKnown for one	Unknown — not stated by the source	Wi-Fi 4 (802.11n)
Wi-Fi standardsKnown for one	Unknown — not stated by the source	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth versionKnown for one	Unknown — not stated by the source	3.0+HS
Cabling technologyKnown for one	Unknown — not stated by the source	10/100/1000Base-T(X)
Networking featuresKnown for one	Gigabit Ethernet	Unknown — not stated by the source
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	3	4
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	1
eSATA/USB 2.0 ports quantityKnown for one	1	Unknown — not stated by the source
Modem (RJ-11) portsKnown for one	1	Unknown — not stated by the source
Keyboardidentical
Numeric keypadKnown for one	Unknown — not stated by the source	No
Keyboard layoutKnown for one	Unknown — not stated by the source	QWERTY
Battery1 differ
Battery technologyKnown for one	Unknown — not stated by the source	Lithium-Ion (Li-Ion)
Battery life (max)Differs	9 h	7.7 h
Weight & dimensions5 differ
WeightDiffers	2.17 kg	2.51 kg
WidthDiffers	340.5 mm	372.8 mm
DepthDiffers	233 mm	245.1 mm
Height (front)Differs	3.01 cm	3.18 cm
Height (rear)Differs	3.05 cm	3.56 cm
Other featuresidentical
Internal modemKnown for one	Yes	Unknown — not stated by the source
Modem speedKnown for one	56 Kbit/s	Unknown — not stated by the source
Supplied AC adapter typeKnown for one	AC	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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