GreenTechLLC
GreenTechLLC 42Wh laptop battery for ThinkPad L14 Gen 3, L15 Gen 3, C14 Gen 1
A 42 Wh three-cell lithium-ion battery at 11.25 V and 3735 mAh replaces multiple OEM packs for ThinkPad L14 Gen 3, L15 Gen 3 and C14 Gen 1 models
- ColorBlack
- TypeBattery
- CompatibilityLENOVO THINKPAD L14 GEN 3, L14 GEN 3 21C1, L14 GEN 3 21C2, L
- Battery Type3 Cell Lithium-Ion
- Battery Voltage11.25V
- Battery Capacity3735MAH
- 42 Wh capacity supports longer unplugged sessions
- 3-cell lithium-ion design keeps weight low
- 25 V output matches original specification
- Replaces multiple OEM part numbers for easy ordering
- CE, FCC and RoHS certified for safety compliance
Replacement battery for ThinkPad L14 Gen 3.
This 42Wh lithium-ion cell restores mobile power to the listed Lenovo models. It matches the original 11.25V specification and fits the internal bay without modification. Owners of compatible L14, L15 or C14 units can swap the pack and regain full runtime.
No bundled accessories or software included
The package contains only the battery itself. No tools, screws, cables or diagnostic utilities are supplied. Installation relies on the laptop’s existing latch mechanism and the operating system’s built-in battery management. Users must provide any prying tools or static protection they prefer.
Limited to the specific ThinkPad families named
The cell will not fit earlier L-series generations, other C-series chassis or any non-Lenovo hardware. Its three-cell layout fixes capacity at 42Wh, so users needing longer unplugged time must carry a spare pack or use an external power bank. The voltage and connector are proprietary to the listed part numbers.
Highlights
- 42 Wh capacity supports longer unplugged sessions
- 3-cell lithium-ion design keeps weight low
- 25 V output matches original specification
- Replaces multiple OEM part numbers for easy ordering
- CE, FCC and RoHS certified for safety compliance
Specifications
| Brand | GreenTech |
|---|---|
| Model | 5B11F21940, 5B11F21942, 5B11F21943, 5B11F21948, 5B11H56338, 5B11H56339, 5B11H56340, 5B11H56341, 5B11H56427, 5B11H56428, 5B11H56429, 5B11H56430, 5B11H56431, 5B11M89996, 5B11M89997, 5B11M89998, L21C3PG1, L21D3PG1, L21L3PG1, L21M3PG1, SB11F21944, SB11F21949, SB11F21950, SB11F21951, SB11H56239, SB11H56242, SB11M89799 |
| Part Number | 5B11F21940, 5B11F21942, 5B11F21943, 5B11F21948, 5B11H56338, 5B11H56339, 5B11H56340, 5B11H56341, 5B11H56427, 5B11H56428, 5B11H56429, 5B11H56430, 5B11H56431, 5B11M89996, 5B11M89997, 5B11M89998, L21C3PG1, L21D3PG1, L21L3PG1, L21M3PG1, SB11F21944, SB11F21949, SB11F21950, SB11F21951, SB11H56239, SB11H56242, SB11M89799 |
| Color | Black |
| Type | Battery |
| Compatibility | LENOVO THINKPAD L14 GEN 3, L14 GEN 3 21C1, L14 GEN 3 21C2, L14 GEN 3 21C5, L14 GEN 3 21C6, L15 GEN 3, L15 GEN 3 21C3, L15 GEN 3 21C4, L15 GEN 3 21C7, L15 GEN 3 21C8, C14 GEN 1, C14 GEN 1 21C9, C14 GEN 1 21CA |
| Battery Type | 3 Cell Lithium-Ion |
| Battery Voltage | 11.25V |
| Battery Capacity | 3735MAH |
Questions about this item
When will the 3-cell 42 Wh lithium-ion pack need replacing?
Capacity fades after repeated charge cycles; plan a swap when runtime no longer meets your daily workload.
What limit appears first during continuous discharge?
The 3735 mAh capacity at 11.25 V defines the total energy available before the pack must recharge.
Does the battery generate noticeable heat or noise during all-day use?
It has no moving parts and runs silently; warmth stays within normal lithium-ion operating range.
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