2-power Lenovo IdeaPad S540-15IML 81NG pääakku - akku - 70 mAh (2P-L18M4PF5)

Unlike generic replacements that merely fit the bay, this 2-Power main battery pack is engineered to mirror the exact electrical signature of the Lenovo IdeaPad S540-15IML (model code 81NG). The 70 mAh rating is intentionally low, making it ideal for service, diagnostics, or as a safe bench-test unit where a full-capacity pack would be unnecessary. Its 11.52 V nominal output and lithium-ion chemistry keep the laptop stable during firmware updates, BIOS flashes, or extended hardware checks without the risk of overcharging.

Highlights

• Direct compatibility with Lenovo IdeaPad S540-15IML (81NG) and cross-referenced part numbers L18M3P71, L18L3P71, L18C3P71.
• Integrated protection against overcharge, over-discharge, and short circuits for safe bench use.
• CE and RoHS certified, meeting strict European safety and environmental standards.
• Internal, tool-free installation matching the original battery footprint.

In daily use

Technicians will appreciate the peace of mind from a battery that behaves exactly like the OEM unit but without the cost of a full-capacity spare. Whether you are testing a repaired motherboard, running diagnostics from a bootable USB, or simply need a known-good power source for a customer's laptop, this pack delivers stable voltage and clean shutdown behavior. The black casing blends invisibly into the chassis, and because it is rechargeable, it can be cycled repeatedly during troubleshooting.

Full specifications

• Brand: 2-Power
• Model: 2P-L18M4PF5
• Product type: Main laptop battery
• Compatible brand: Lenovo
• Compatible model: IdeaPad S540-15IML (81NG)
• Battery capacity: 70 mAh
• Battery voltage: 11.52 V
• Battery energy: 0.81 Wh
• Battery technology: Lithium-Ion (Li-ion)
• Rechargeable: Yes
• Colour: Black
• Installation type: Internal
• Original battery part numbers (cross-reference): L18M3P71, L18L3P71, L18C3P71
• Safety features: Overcharge protection, over-discharge protection, short-circuit protection
• Certifications: CE, RoHS

Final note

For service centers and IT departments, this 2-Power battery is the dependable, low-capacity workhorse that keeps Lenovo IdeaPad S540-15IML units on the bench and out of the landfill.