Battery Arcoff Akumulator 4Ah Li‑ion 20V Connect (VJ4AK)

Arcoff Akumulator 4Ah Li‑ion 20V Connect (model VJ4AK) is a rechargeable lithium‑ion battery pack designed to supply power to compatible 20V cordless tools and garden equipment. With a nominal voltage of 20V and a capacity of 4 ampere‑hours, this battery offers extended runtime compared to smaller cells while keeping a compact, portable form factor. The Connect interface enables quick attachment and removal for efficient battery swaps during continuous work.

Advantages

This 20V Li‑ion battery provides stable voltage output and consistent performance throughout discharge, supporting demanding tasks such as drilling and trimming. The 4Ah capacity balances runtime and weight to deliver longer operation without excessive bulk. Built with modern lithium‑ion chemistry, the pack shows low self‑discharge and does not suffer from memory effect, allowing users to recharge at any convenient time. The Connect interface simplifies installation and removal, making it suitable for rapid tool changes on job sites or in the garden.

Suitable for

• Cordless drills and impact drivers for medium‑duty drilling and fastening
• Cordless saws and cutters for light to medium cutting tasks
• Cordless garden tools such as trimmers, hedge trimmers and leaf blowers
• Portable maintenance and assembly work where quick battery swaps are required

Key specifications

• Battery type: Lithium‑ion (Li‑ion)
• Nominal voltage: 20 V
• Capacity: 4 Ah (4 ampere‑hours)
• Interface: Connect quick‑attach system
• Intended use: Compatible with 20V cordless power tools and garden equipment

How to use

Ensure the tool and battery contacts are clean and dry before installing the battery. Align the battery with the tool's Connect interface and slide it into place until it clicks to indicate a secure connection. Monitor the tool's charge indicator (if present) and replace the battery with a charged unit when performance drops. Charge the battery using a compatible Arcoff 20V charger according to the charger's instructions; avoid using incompatible chargers to prevent damage.

Usage recommendations

Store the battery in a cool, dry place when not in use and avoid exposure to extreme temperatures. For prolonged storage, keep the battery partially charged (around 30–50%). Do not disassemble, crush or expose the battery to fire or water. Follow the manufacturer's safety instructions and recycle the battery according to local regulations.