01AV427 - 61++ Battery for ThinkPad T470 T480 T570 T580 A475 A485 P51s P52s TP25 Series

61++ – 10.8V 6600mAh 72Wh 6-Cell Li-ion Battery for T470 T480 T570 T580 A475 A485 P51s P52s TP25 Series

New third-party 100% compatible OEM replacement battery, not manufactured by Lenovo.
This is a high-quality, factory-fresh unit built to the same specifications as the original 61++ design, offering reliable performance and extended runtime.

Technical Specifications

• Brand: Unbranded
• Model: 61++
• Battery Type: Li-ion (Lithium-Ion)
• Voltage: 10.8 V
• Capacity: 6600 mAh
• Energy: 72 Wh
• Number of Cells: 6-Cell
• Rechargeable: Yes
• Certifications: CE, RoHS, UL-compliant cells

Interchangeable / Replacement Part Numbers

61++, 4X50M08812, SB10K97584, SB10K97585, 01AV492, 01AV427
Compatible replacements and substitutes:
61 (01AV422, 01AV423, 01AV424, 01AV452, 01AV490, 01AV426)
61+ (SB10K97582, SB10K97583, 01AV425, 01AV491)

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on system configuration and battery slot type.

✔️ Compatible Models:
T470, T480, T570, T580, A475, A485, P51s, P52s, TP25 Series

✔️ Series Compatibility:
Designed for all systems supporting 61 / 61+ / 61++ style external batteries.

☑️ Key Features

☑️ Brand-new third-party unit — not refurbished or pulled
☑️ Long-lasting lithium-ion cells for optimal performance and durability
☑️ Smart circuitry for safety, temperature, and power management
☑️ Backward-compatible with 61 and 61+ battery types
☑️ Built-in protection from over-charge, over-discharge, and short-circuit events

⚙️ Fit Notes

• Form-factor identical to 61++ type; fits any matching battery bay.
• Backward-compatible with lower-capacity 61 and 61+ versions.
• Allow a full charge/discharge cycle after installation for accurate calibration.
• Use only with certified compatible AC adapters for best performance.