The Lenovo L12L4A02 / L12S4E01 Laptop Battery is a premium 4-cell external replacement battery custom engineered for a wide array of consumer laptops, including the Lenovo G400s, G500s, G50-70, G50-80, Z50, and Z70 series. Featuring a robust 14.4V/14.8V architecture and top-tier lithium-ion cells, it supplies high-density power capacity, stable voltage flow, and efficient energy management necessary to power through your daily digital tasks without staying plugged into the wall. Equipped with advanced safety integrated circuitry, this external power rail protects your machine against unexpected overcharging, over-current, and short-circuit faults. Designed to match exact physical OEM footprints, this replacement battery drops securely into the rear battery bay with zero tools required, instantly restoring the mobile life, flexibility, and convenience of your notebook system.
Features
Premium Grade-A lithium-ion cells provide clean power delivery and optimal capacity retention.
Slimline 4-cell form factor matches the factory contour, locking in flush without protruding.
Built-in multi-protection safety framework guards against overcharging, over-discharging, overheating, and short circuits.
Highly efficient power management delivers stable, consistent output for daily browsing, remote study, and multimedia tasks.
Direct-fit replacement built to strictly meet or exceed original Lenovo OEM specifications.
Engineered to handle hundreds of seamless charge-discharge cycles for reliable, long-term operation.
Tool-free external slide-and-snap installation utilizing dual spring-loaded release locks.
Key Specifications
Battery Model: L12L4A02 / L12S4E01 / L12M4E01
Battery Type: Lithium-Ion (Li-Ion)
Cells: 4-Cell
Voltage: 14.4V / 14.8V (Interchangeable layout parameters)
Capacity: 41Wh / 32Wh (2200mAh – 2800mAh)
Color: Black
Condition: Brand New Replacement Battery
Rechargeable: Yes
Compatible Laptop Models
Lenovo G-Series (Slim): G400s, G405s, G410s, G500s, G505s, G510s
Lenovo G40 & G50 Series: G40-30, G40-45, G40-70, G40-80, G50-30, G50-45, G50-70, G50-75, G50-80
Lenovo Z-Series: Z40, Z40-70, Z50, Z50-70, Z70, Z70-80, Z710
Lenovo S-Series: S410p, S510p
⚠️ Important Compatibility Note: This low-profile battery fits models ending in “s” or specific newer thin chassis variants like the G50-80. It will not fit older, bulkier classic models like the standard Lenovo G500 or G580, which require a completely different, thicker 11.1V 6-cell battery block.
Compatible Part Numbers
L12L4A02
L12L4E01
L12S4A02
L12S4E01
L12M4A02
L12M4E01
121500171
121500172
121500173
121500174
121500175
121500176
451-BBID
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