Lenovo / ThinkPad / L Series
ThinkPad L15 Gen 1 (Intel)
ThinkPad L15 Gen 1 (Intel) is a 15.6-inch notebook in the L Series family.
- Scope
- Product generation / platformPSREF verified
- Machine Type
- 20U3 / 20U4
- Model / MTM
- 3749Official Models verifiedDirect specifications: 20U3000TJP
Buying and service essentials
Verified in official sourcesCheck before buying
- Model / MTM
- 1 exact specifications recorded3749 Models entries verified
- CPU / GPU
- Intel Celeron / 10th Generation Intel Core i3 / Core i5 / Core i76 CPU options / Intel UHD Graphics / Platform option / dGPU: AMD Radeon 625 (configuration-dependent)
- Display
- 15.6-inch / 1366x768 / 1920x10803 platform options / Non-touch / Multi-touch
- WWAN
- Configuration-dependentRetrofit conditions apply
Upgrades and repair
- Memory
- DDR4-2400 / DDR4-2666 / SocketedSO-DIMM: 2 / maximum 64 GB
- Storage
- 2.5-inch SATA HDD / M.2 2242 PCIe NVMe SSD / M.2 2280 PCIe NVMe SSD / M.2 Intel Optane MemorySATA 6Gb/s / PCIe NVMe 3.0 x2 / PCIe NVMe 3.0 x4 / Maximum simultaneous devices 2 device(s)
- Power
- USB-CAC adapter: 45 W / 65 W
- Parts / service
- Not collectedHMM verified / Key procedures verified
Motherboard and slot topology
Evidence confidence: not recorded
?
Shows the strength of the supporting evidence. It is not a performance score or recommendation. Full sources appear in the Evidence section below.
- Memory implementation
- DDR4-2400 / DDR4-2666 / Socketed / SO-DIMM: 2
- Storage form factor
- 2.5-inch SATA HDD / M.2 2242 PCIe NVMe SSD / M.2 2280 PCIe NVMe SSD / M.2 Intel Optane Memory
- Maximum simultaneous devices
- 2 device(s)
Specifications
CPU
Evidence confidence: high
CPU options for this platform / IntelIntel Celeron / 10th Generation Intel Core i3 / Core i5 / Core i7
| CPU | Integrated GPU | Cores / threads | Base frequency | Max frequency |
|---|---|---|---|---|
| Intel Celeron 5205UOpen external site in a new tab | Intel UHD Graphics | 2 / 2 | 1.90 GHz | ― |
| Intel Core i3-10110UOpen external site in a new tab | Intel UHD Graphics | 2 / 4 | 2.10 GHz | 4.10 GHz |
| Intel Core i5-10210UOpen external site in a new tab | Intel UHD Graphics | 4 / 8 | 1.60 GHz | 4.20 GHz |
| Intel Core i5-10310UOpen external site in a new tab | Intel UHD Graphics | 4 / 8 | 1.70 GHz | 4.40 GHz |
| Intel Core i7-10510UOpen external site in a new tab | Intel UHD Graphics | 4 / 8 | 1.80 GHz | 4.90 GHz |
| Intel Core i7-10610UOpen external site in a new tab | Intel UHD Graphics | 4 / 8 | 1.80 GHz | 4.90 GHz |
Graphics / GPU
Evidence confidence: high
dGPU options
| GPU | Dedicated memory | Selection conditions |
|---|---|---|
| AMDAMD Radeon 625Open external site in a new tab | 2 GB / GDDR5 | Configuration-dependent
|
These are platform configuration options, not the GPU installed in an individual MTM.
Memory
Evidence confidence: high
- Type
- DDR4-2400 / DDR4-2666
- Maximum capacity
- 64 GB
- Physical slots
- 2
- Implementation
- DDR4-2400 / DDR4-2666 / Socketed
- Upgrade / replacement
- Not recorded
- Configuration constraints
- Two DDR4 SO-DIMM slots; dual-channel capable
- Installed DDR4-3200 memory runs at 2400MHz or 2666MHz according to processor memory support
Check the board layout in the HMMOpen external site in a new tab
Storage
Evidence confidence: high
- Interface and form factor
- SATA 6Gb/s / PCIe NVMe 3.0 x2 / PCIe NVMe 3.0 x4
- Supported form factors
- 2.5-inch SATA HDD
- M.2 2242 PCIe NVMe SSD
- M.2 2280 PCIe NVMe SSD
- M.2 Intel Optane Memory
- Physical slots
- Not recorded
- Maximum simultaneous devices
- 2 device(s)
- Upgrade / replacement
- Not recorded
- Configuration constraints / exclusions
- HDD/SSD mode supports a 2.5-inch HDD plus an M.2 2242 SSD; this two-drive mode was not available in EMEA.
- One-SSD mode supports one M.2 2242 or M.2 2280 SSD; these formats are alternatives in the same storage path.
- The system has either one 2.5-inch drive slot or one M.2 2280 slot exclusively for primary storage.
Check the SSD replacement procedure in the HMMOpen external site in a new tab
Display
Evidence confidence: high
- Size
- 15.6-inch
- Platform configuration options
configuration Resolution Touch Panel / brightness Surface / features HD TN
15.6-inch1366x768 Non-touch TN / 220 nits anti-glare FHD IPS
15.6-inch1920x1080 Non-touch IPS / 250 nits anti-glare FHD IPS touch
15.6-inch1920x1080 Multi-touch IPS / 300 nits anti-glare
Battery architecture
Evidence confidence: high
- Architecture
- Internal
- Explicit count
- 1
- Chemistry
- Li-Polymer
- Capacity
- 45 Wh
Each row is a platform configuration option. Simultaneous installation is not inferred.
Power and AC adapter
Evidence confidence: high
- Connector
- USB-C
- Wattage
- 45 W / 65 W
Wireless and WWAN
Evidence confidence: high
- WLAN options
- Wi-Fi 6 802.11ax 2x2 with Bluetooth 5.1
- MediaTek Wi-Fi 6 MT7921 with Bluetooth 5.1
- Realtek Wi-Fi 6 RTL8852AE with Bluetooth 5.1
- Intel Wi-Fi 6 AX200 with Bluetooth 5.1
- No WLAN and Bluetooth
- WWAN
- Configuration-dependent
- Retrofit / conditions
- Retrofit conditions apply
- WWAN options
- Wireless WAN upgradable to 4G with antenna ready
- Fibocom L850-GL 4G LTE CAT9
- No support
- Notes
- Non-WWAN models are not WWAN-upgradable; WWAN is not supported on HDD models.
Ports and docking
Evidence confidence: high
- Ports
- Two USB 3.2 Gen 1 Type-A including one Always On
- USB-C 3.2 Gen 1 with Power Delivery and DisplayPort 1.2
- USB-C 3.2 Gen 2 with Power Delivery and DisplayPort 1.2
- HDMI 1.4b
- Ethernet RJ-45
- MicroSD card reader
- Optional smart card reader
- Optional nano-SIM card slot on WWAN models
- Docking support
- Physical connector: Side docking connector
- USB-C docking support
Dimensions and weight
Evidence confidence: high
- All models; dimensions vary by configuration
- 366.5 × 250 × 21 mm
- PSREF states around 1.98 kg; varies by configuration
- 1.98 kg / Varies by configuration
Official maintenance documentation and key procedures
- ThinkPad L14 Gen 1 and ThinkPad L15 Gen 1 Hardware Maintenance ManualOpen external site in a new tabScope: Combined Hardware Maintenance Manual applicable to ThinkPad L14 Gen 1 Machine Types 20U1, 20U2, 20U5, and 20U6 and ThinkPad L15 Gen 1 Machine Types 20U3, 20U4, 20U7, and 20U8; covers Intel and AMD models
Key procedures
- Keyboard
- p.75–76
- Base cover
- p.76–77
- Memory
- p.79–80
- SSD / storage
- p.81–83
- Built-in battery
- p.88–89
- Display assembly
- p.106–110
Part number information
Part numbers and their relationships to this product or model are shown when verified in official Lenovo sources.
Official Model-listed parts
Not collectedKATABAN.FYI has not yet collected official Model-listed parts for this product. This is not evidence that no compatible parts exist.
Model / MTM
3749Codes listed in Lenovo Models identify a relationship to this product. They do not establish exact CPU, memory, storage or other configuration details.
- Model / MTM codes verified in official sources
- 3749
- Exact configuration data
- 1
Enter a code to search the official Lenovo Models data for this product.
Model / MTM with recorded exact specifications
Exact specifications recordedThese are sold configurations listed in Lenovo Models. They are not serial-number or as-built configurations. Each value comes directly from the applicable Model / MTM row.
| Model / MTM | Machine Type | Region / Country/Region | Processor | Graphics | Memory | Storage | Display | Touchscreen | WLAN / Bluetooth | WWAN | OS | Official evidence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
20U3000TJP | 20U3 | JAPAN / Japan | Intel Core i5-10310U (4C / 8T, 1.7 / 4.4GHz, 6MB) | Integrated Intel UHD Graphics | 2x 4GB SO-DIMM DDR4-2666 | 500GB HDD 7200rpm 2.5" | 15.6" HD (1366x768) TN 220nits Anti-glare | None | Intel AX200 11ax, 2x2 + BT5.2 | None | Windows 10 Pro 64, Japanese | Lenovo Models |
Evidence
3 sources. Of 12 product claims, 12 are verified with high confidence.This page covers PSREF platform information and identifiers listed in Lenovo Models. Exact MTM specifications and parts relationships have not been collected. Procedure coverage in official maintenance documentation is audited per product for major components.