Lenovo 3-Cell 52.5Wh 11.52V Li-Ion Internal Laptop Battery L21M3PE0 (5B11F38042)

Keep your Lenovo IdeaPad Pro 5 or IdeaPad Slim 5 running through long workdays and study sessions with this 3-cell lithium-ion battery. It delivers 52.5 Wh at 11.52 V, matching the original internal battery specification for a straightforward swap when the original no longer holds a charge.

Key specifications

• Battery technology: Lithium-Ion (Li-Ion)
• Number of cells: 3
• Capacity: 52.5 Wh
• Voltage: 11.52 V
• Calculated capacity: 4557 mAh
• Manufacturer part number: L21M3PE0
• FRU part number: 5B11F38042
• Product colour: Black
• Mounting: Internal (integrated)
• Rechargeable: Yes

Why choose it

This battery restores your laptop's portability and runtime. The 52.5 Wh capacity is suitable for everyday productivity, web browsing, and media consumption. Its internal design fits securely inside the laptop chassis, preserving the original look and feel.

Ideal use cases

• Replacing a worn-out or failed battery in a compatible Lenovo IdeaPad Pro 5 or IdeaPad Slim 5
• Extending time away from a power outlet for students and mobile professionals
• Restoring a laptop to full functionality for resale or continued personal use

Good to know

This is a new, rechargeable lithium-ion battery. It is an internal component and requires opening the laptop case for installation. Ensure your laptop model is listed as compatible before purchase.