We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular lithium-ion laptop battery with connector on one side

Beisite

Beisite L21C3PG1 L21D3PG1 L21M3PG1 L21L3PG1 laptop battery

SKU CH-P5SG-2N565

New 11.4 V 42 Wh lithium-ion replacement battery for ThinkPad L14 and L15 third- and fourth-generation models from 2022

  • ColorBlack
  • TypeBattery
  • Compatibilityfor Thinkpad L14 L15 3rd Gen 2022
  • Battery TypeLithium-Ion
  • Battery Voltage11.4V
  • Battery Capacity42Wh
  • 42Wh capacity powers your ThinkPad through the day
  • 4V lithium-ion chemistry matches original specifications
  • Replaces multiple Lenovo part numbers including SB11F21951
  • Fits L14 and L15 Gen 3 and Gen 4 models
  • Brand-new condition ensures full performance from first charge

Replacement battery for ThinkPad L14 and L15

This 11.4 V lithium-ion pack delivers 42 Wh of capacity and fits ThinkPad L14 Gen 3, L14 Gen 4, L15 Gen 3 and L15 Gen 4 models from 2022. It also supports the ThinkPad C14 Gen 1 Chromebook series. The black unit is supplied new and ready to install.

Upgrade from depleted original cells

It replaces part numbers such as L21D3P71, L21M3P76, L21B3P73, L21D3PG1, L21C3PG1, L21M3PG1 and L21L3PG1 along with their SB11 and 5B11 variants. The jump is worth it when the original battery no longer holds a useful charge or shows swelling. Users who need a higher capacity than 42 Wh will not be served by this pack.

Fits directly into the existing bay

The battery slides into the standard internal compartment without extra brackets or cables. It restores mobile operation for the listed ThinkPad models and frees the user from permanent mains connection. Builders working on other laptop families or requiring a different voltage must look elsewhere.

Highlights

  • 42Wh capacity powers your ThinkPad through the day
  • 4V lithium-ion chemistry matches original specifications
  • Replaces multiple Lenovo part numbers including SB11F21951
  • Fits L14 and L15 Gen 3 and Gen 4 models
  • Brand-new condition ensures full performance from first charge

Specifications

BrandL21C3PG1 L21D3PG1 L21M3PG1 L21L3PG1
ModelL21C3PG1 L21D3PG1 L21M3PG1 L21L3PG1
Part NumberSB11F21951 5B11F21943 SB11H56242
ColorBlack
TypeBattery
Compatibilityfor Thinkpad L14 L15 3rd Gen 2022
Battery TypeLithium-Ion
Battery Voltage11.4V
Battery Capacity42Wh

Questions about this item

Does this 42 Wh battery fit the internal bay of a ThinkPad L14 Gen 3 or L15 Gen 3?

Yes, it is built for the ThinkPad L14 and L15 3rd Gen 2022 chassis and matches the original 11.4 V form factor.

What is the common installation mistake when swapping this battery?

Forgetting to disable the internal battery in the BIOS or UEFI before opening the case, which can cause a short circuit.

When will this lithium-ion pack need replacing?

After the 12-month warranty period, runtime will gradually decline; replace once it no longer holds enough charge for your workflow.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.