Lenovo / ThinkPad / L Series
ThinkPad L15 Gen 3 (Intel)
ThinkPad L15 Gen 3 (Intel) is a 15.6-inch notebook in the L Series family.
- Scope
- Product generation / platformPSREF verified
- Machine Type
- 21C3 / 21C4
- Model / MTM
- 5400Official Models verifiedDirect specifications: 21C3004NJP
Buying and service essentials
Verified in official sourcesCheck before buying
- Model / MTM
- 1 exact specifications recorded5400 Models entries verified
- CPU / GPU
- Intel Pentium or 12th Generation Intel Core i3 / Core i5 / Core i7 Processor9 CPU options / Intel UHD Graphics / Intel Iris Xe Graphics / Platform options / integrated GPU varies by CPU / this PSREF does not list a dGPU option
- Display
- 15.6-inch / 1920x10802 platform options / Non-touch / Multi-touch
- WWAN
- Configuration-dependentRetrofit conditions apply
Upgrades and repair
- Memory
- DDR4-3200 / SocketedSO-DIMM: 2 / maximum 64 GB
- Storage
- M.2 2242 PCIe NVMe SSDPCIe NVMe 4.0 x4 / Maximum simultaneous devices 1 device(s)
- Power
- USB-C Power Delivery 3.0AC 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
- DDR4-3200 / Socketed / SO-DIMM: 2
- Storage form factor
- M.2 2242 PCIe NVMe SSD
- Maximum simultaneous devices
- 1 device(s)
Specifications
CPU
Evidence confidence: high
CPU options for this platform / IntelIntel Pentium or 12th Generation Intel Core i3 / Core i5 / Core i7 Processor
| CPU | Integrated GPU | Cores / threads | Base frequency | Max frequency |
|---|---|---|---|---|
| Intel Pentium Gold 8505Open external site in a new tab | Intel UHD Graphics | 5 / 6 | 1.20 GHz | 4.40 GHz |
| Intel Core i3-1215UOpen external site in a new tab | Intel UHD Graphics | 6 / 8 | 1.20 GHz | 4.40 GHz |
| Intel Core i5-1235UOpen external site in a new tab | Intel Iris Xe Graphics | 10 / 12 | 1.30 GHz | 4.40 GHz |
| Intel Core i5-1240POpen external site in a new tab | Intel Iris Xe Graphics | 12 / 16 | 1.70 GHz | 4.40 GHz |
| Intel Core i5-1245UOpen external site in a new tab | Intel Iris Xe Graphics | 10 / 12 | 1.60 GHz | 4.40 GHz |
| Intel Core i5-1250POpen external site in a new tab | Intel Iris Xe Graphics | 12 / 16 | 1.70 GHz | 4.40 GHz |
| Intel Core i7-1255UOpen external site in a new tab | Intel Iris Xe Graphics | 10 / 12 | 1.70 GHz | 4.70 GHz |
| Intel Core i7-1260POpen external site in a new tab | Intel Iris Xe Graphics | 12 / 16 | 2.10 GHz | 4.70 GHz |
| Intel Core i7-1265UOpen external site in a new tab | Intel Iris Xe Graphics | 10 / 12 | 1.80 GHz | 4.80 GHz |
Graphics / GPU
Evidence confidence: high
This PSREF does not list a dGPU option.
- Notes
- Intel Iris Xe Graphics requires dual-channel memory; with single-channel memory it functions as Intel UHD Graphics.
These are platform configuration options, not the GPU installed in an individual MTM.
Memory
Evidence confidence: high
- Type
- DDR4-3200
- Maximum capacity
- 64 GB
- Physical slots
- 2
- Implementation
- DDR4-3200 / Socketed
- Upgrade / replacement
- Not recorded
- Configuration constraints
- Two DDR4 SO-DIMM slots, dual-channel capable
Check the board layout in the HMMOpen external site in a new tab
Storage
Evidence confidence: high
- Interface and form factor
- PCIe NVMe 4.0 x4
- Supported form factors
- M.2 2242 PCIe NVMe SSD
- Physical slots
- 1
- Maximum simultaneous devices
- 1 device(s)
- Upgrade / replacement
- Not recorded
- Configuration constraints / exclusions
- One M.2 2242 PCIe 4.0 x4 slot
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 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
| Placement | Position | Optional | Chemistry | Cell options | Capacity options |
|---|---|---|---|---|---|
| Internal | Not recorded | Not recorded | Li-Polymer | Not recorded | 42 Wh / 57 Wh / 63 Wh |
Each row is a platform configuration option. Simultaneous installation is not inferred.
Power and AC adapter
Evidence confidence: high
- Connector
- USB-C Power Delivery 3.0
- Wattage
- 45 W / 65 W
Wireless and WWAN
Evidence confidence: high
- WLAN options
- Intel Wi-Fi 6 AX201, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1, M.2 Card
- Qualcomm Wi-Fi 6E NFA725A, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1
- Qualcomm Wi-Fi 6E QCNFA765, 802.11ax Dual Band 2x2 Wi-Fi + Bluetooth 5.1, M.2 Card
- Intel Wi-Fi 6E AX211, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1
- Intel Wi-Fi 6E AX211, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1, M.2 Card
- No WLAN and Bluetooth
- WWAN
- Configuration-dependent
- Retrofit / conditions
- Retrofit conditions apply
- WWAN options
- Wireless WAN upgradable to 4G (with antenna ready)
- Quectel EM05-G, 4G LTE CAT4, M.2 card
- Fibocom L860-GL-16, 4G LTE CAT16, M.2 card
- No support
- Notes
- Only configurations explicitly listed as antenna-ready are documented as WWAN-upgradable.
Ports and docking
Evidence confidence: high
- Ports
- 1x USB 3.2 Gen 1
- 1x USB 3.2 Gen 1 (Always On)
- 1x USB-C 3.2 Gen 1 (support data transfer, Power Delivery 3.0 and DisplayPort 1.4)
- 1x Thunderbolt 4 / USB4 40Gbps (support data transfer, Power Delivery 3.0 and DisplayPort 1.4)
- 1x HDMI 2.1, up to 4K/60Hz
- 1x Headphone / microphone combo jack (3.5mm)
- 1x Ethernet (RJ-45)
- 1x microSD card reader
- 1x Smart card reader
- 1x Nano-SIM card slot (WWAN support models)
- Docking support
- Various docking solutions supported via Thunderbolt or USB-C.
Dimensions and weight
Evidence confidence: high
- All models
- 360.2 × 237 × 19.93 mm
- All models
- 1.76 kg / Starting weight
Official maintenance documentation and key procedures
- ThinkPad L14 Gen 3 and ThinkPad L15 Gen 3 Hardware Maintenance ManualOpen external site in a new tabScope: Combined Hardware Maintenance Manual for ThinkPad L14 Gen 3 Machine Types 21C1, 21C2, 21C5, and 21C6 and ThinkPad L15 Gen 3 Machine Types 21C3, 21C4, 21C7, and 21C8; covers Intel and AMD models
Key procedures
- Keyboard
- p.73–75
- Base cover
- p.76–78
- M.2 SSD
- p.78–80
- Memory
- p.85
- Built-in battery
- p.91–93
- Display assembly
- p.109–112
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
5400Codes 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
- 5400
- 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
21C3004NJP | 21C3 | JAPAN / Japan | Intel Core i5-1235U, 10C (2P + 8E) / 12T, P-core 1.3 / 4.4GHz, E-core 0.9 / 3.3GHz, 12MB | Integrated Intel Iris Xe Graphics Functions as UHD Graphics | 1x 8GB SO-DIMM DDR4-3200 | 256GB SSD M.2 2242 PCIe 4.0x4 NVMe Opal 2.0 | 15.6" FHD (1920x1080) IPS 250nits Anti-glare | None | Intel Wi-Fi 6 AX201, 802.11ax 2x2 + BT5.1 | None | Windows 11 DG 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.