GreenTechLLC
GreenTechLLC L21L4P73 57WHR 15.36V 4-cell laptop battery for Lenovo ThinkPad T14s Gen 3/4
57 Whr 4-cell lithium-ion replacement battery for Lenovo ThinkPad T14s Gen 3 and Gen 4 models
- ColorBlack
- TypeBattery
- CompatibilityLENOVO THINKPAD T14S GEN 3, T14S GEN 3 21BR, T14S GEN 3 21BS
- Battery Type4 Cell Lithium-Ion
- Battery Voltage15.36V
- Battery Capacity3711 MAH
- Compatible with ThinkPad T14s Gen 3 and Gen 4 models
- 57 Whr capacity provides extended runtime for mobile work
- 4-cell lithium-ion design at 15.36 V matches original specifications
- Replaces multiple OEM part numbers including L21B4P71 and L21M4P75
- Tested for correct voltage, circuit protection and low self-discharge
GreenTech 57 Wh four-cell ThinkPad battery
This GreenTech four-cell lithium-ion pack delivers 57 Wh at 15.36 V for Lenovo ThinkPad T14s Gen 3 and Gen 4 models. It replaces the OEM part numbers L21B4P71, L21L4P73, L21M4P75 and the 5B10W51874-77 series. The unit suits owners who need a direct voltage and capacity match for daily mobile work.
Single-voltage 15.36 V design limits swapping
The battery operates at a fixed 15.36 V and 3711 mAh, so it cannot serve laptops that require a different cell voltage or a higher watt-hour rating. Users with ThinkPad models outside the listed Gen 3 and Gen 4 sub-models will find the connector and firmware handshake incompatible. It also does not support fast-charge protocols beyond the original specification.
Black polymer casing with internal protection
The black housing fits the existing battery bay without adapters or case modification. Built-in circuitry provides over-voltage, over-current and short-circuit safeguards while maintaining low self-discharge during storage. CE, FCC and RoHS certifications confirm compliance with basic safety and environmental standards for office and travel use.
Highlights
- Compatible with ThinkPad T14s Gen 3 and Gen 4 models
- 57 Whr capacity provides extended runtime for mobile work
- 4-cell lithium-ion design at 15.36 V matches original specifications
- Replaces multiple OEM part numbers including L21B4P71 and L21M4P75
- Tested for correct voltage, circuit protection and low self-discharge
Specifications
| Brand | GreenTech |
|---|---|
| Model | L21B4P71, L21L4P73, L21M4P75, SB10W51975, SB10W51976, SB10W51978, 5B10W51874, 5B10W51875, 5B10W51876, 5B10W51877 |
| Part Number | L21B4P71, L21L4P73, L21M4P75, SB10W51975, SB10W51976, SB10W51978, 5B10W51874, 5B10W51875, 5B10W51876, 5B10W51877 |
| Color | Black |
| Type | Battery |
| Compatibility | LENOVO THINKPAD T14S GEN 3, T14S GEN 3 21BR, T14S GEN 3 21BS, T14S GEN 3 21CQ, T14S GEN 3 21CR, T14S GEN 4, T14S GEN 4 21F6, T14S GEN 4 21F7 |
| Battery Type | 4 Cell Lithium-Ion |
| Battery Voltage | 15.36V |
| Battery Capacity | 3711 MAH |
Questions about this item
Which part number should I pick for my ThinkPad T14s Gen 3 or Gen 4?
All listed part numbers — L21B4P71, L21L4P73, L21M4P75, SB10W51975, SB10W51976, SB10W51978, 5B10W51874, 5B10W51875, 5B10W51876, 5B10W51877 — are direct replacements for the same 4-cell battery used across T14s Gen 3 and Gen 4 models.
What does the 57 Wh rating mean for daily runtime on a T14s?
The 57 Wh capacity at 15.36 V delivers 3711 mAh, matching the original factory specification so typical mixed workloads should see the same battery life the laptop had when new.
Does the 15.36 V connector match the original motherboard interface on the T14s?
Yes — the battery is built to the exact 15.36 V, 4-cell lithium-ion layout used by Lenovo for the T14s Gen 3 and Gen 4, so it plugs straight into the existing motherboard connector without adapters.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
Case Logic
Case Logic 3203990 briefcase for 15.6 in laptop with 10.1 in tablet pocket
$30.99
0.00036919BTC
In stock