Product Description

Hyundai BI20-4 20V 4.0Ah Li-Ion Battery for 2nd Generation 20v Range

The Hyundai BI20-4 4Ah lithium-ion battery keeps your 20V 2nd Generation cordless tools running longer. Fast 120-minute charging, advanced TES cooling technology and a robust 360° cell-protection shell deliver reliable, fade-free power and extended service life—ideal as a spare or replacement pack for uninterrupted productivity in the garden or workshop.

BI20-4 Features:

• High-capacity 4Ah lithium-ion pack for extended runtimes
• Full recharge in ≈ 120 min with C20-2 2A charger (sold separately)
• TES energy-storage material and air-channel cooling prevent overheating
• 360° shock- and leak-proof housing protects internal cells
• No memory effect—recharge anytime without capacity loss
• LED charge-level indicator shows remaining power at a glance
• Interchangeable across all Hyundai 20V 2nd Generation tools (HY20-series)
• 3-year Hyundai warranty for peace of mind

BI20-4 Specifications:

• Model: BI20-4
• Compatibility: Hyundai 20V 2nd Generation range
• Battery Capacity: 4Ah
• Voltage: 20V
• Charge Time: 120 min (with C20-2 charger)
• Runtime: Tool-dependent long runtime
• Battery Lifespan: 300+ cycles
• Gross Weight: 0.65 kg

What is included

• 1× Hyundai BI20-4 20V 4.0Ah Li-Ion Battery for 2nd Generation 20v Range
• 1× User manual