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Black rectangular lithium-ion laptop battery with connector pins

Beisite

Beisite L21B3PE0 L21C3PE0 L21D3PE0 L21L3PE0 L21M3PE0 L21M3PE1 laptop battery

SKU CH-EH77-VE3WK

Replacement lithium-ion battery for Lenovo IdeaPad Flex 5 models, 11.52 V, 52.5 Wh

  • Battery typeLithium-Ion
  • Battery voltage rating11.52 V
  • Battery capacity52.5 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor IdeaPad Flex 5 14ALC7 14IAU7 14IRU8 16ABR8
  • Reliable power for Lenovo IdeaPad Flex 5 models
  • 5 Wh capacity supports extended mobile use
  • 52 V lithium-ion chemistry matches original spec
  • Replaces multiple Lenovo part numbers including 5B11F38035
  • Brand-new condition ensures full performance from first charge

Compatible replacement for IdeaPad Flex 5

This lithium-ion battery replaces part numbers L21B3PE0, L21C3PE0, L21D3PE0, L21L3PE0, L21M3PE0 and L21M3PE1. It fits Lenovo IdeaPad Flex 5 models including 14ALC7, 14IAU7, 14IRU8 and 16ABR8 variants. The unit ships new in black with a 52.5Wh capacity and 11.52V output. Buyers with other laptop series should verify their part number before ordering.

Thermal behaviour and power delivery

The battery operates at 11.52 volts and stores 52.5 watt-hours of energy using standard lithium-ion chemistry. It supplies power directly to the laptop without an external adapter while unplugged. Heat output and fan activity remain governed by the notebook's own thermal design. No additional cooling or power equipment is required for normal use.

Upgrade context and fitment limits

This part replaces the original factory battery when runtime has degraded or the pack no longer holds charge. It restores the same 52.5Wh capacity rather than extending it. The swap is worthwhile when the existing cell shows reduced longevity or swelling. Users needing higher capacity or a different voltage should look for a model specifically rated for their chassis.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $46.99
Pricier than about 79% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameL21B3PE0 L21C3PE0 L21L3PE0
Model nameL21B3PE0 L21C3PE0 L21L3PE0
Part numberL21B3PE0, L21C3PE0, L21D3PE0, L21L3PE0, L21M3PE0
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.52 V
Battery capacity52.5 Wh
Compatibility
Compatible withFor IdeaPad Flex 5 14ALC7 14IAU7 14IRU8 16ABR8

Questions about this item

How do I install the 11.52V 52.5Wh battery in my IdeaPad Flex 5 14ALC7, and what step do people get wrong?

Power off the laptop, remove the bottom case screws, disconnect the old battery cable before lifting it out, connect the new pack, then refit the case; the step often missed is unplugging the cable first.

What maintenance or replacement will the L21B3PE0 L21C3PE0 L21L3PE0 battery need later?

The lithium-ion pack has no user-serviceable parts; replace the whole unit when run-time no longer meets your needs.

What limit shows up first on the 11.52V pack during sustained heavy use?

The 52.5Wh capacity determines how long the laptop runs before the battery needs recharging.

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