wowrmaykay 4.0ah battery close-up showing high capacity for longer tool runtime
wowrmaykay bosch 18v compatibility slots showing easy click-in fit
wowrmaykay LED indicator shows battery status for quick checks
wowrmaykay battery with BMS protection against overcharge and overheating
wowrmaykay 18v tools runtime extension for heavy tasks
wowrmaykay battery works with original Bosch charger
wowrmaykay durable packaging with 12-month warranty
wowrmaykay ideal for heavy-duty drilling and sawing tasks

wowrmaykay

wowrmaykay 4.0Ah Replacement Battery for Bosch 18V | BAT609 BAT618 BAT619G BAT610G BAT612

High-performance tools and home improvement made for confident daily results

$50.40

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Why customers choose TaskHolt Tools

Powerful, Compatible, and Ready for Bosch 18V Tools

The wowrmaykay 4.0Ah replacement battery is designed to refresh your Bosch 18V toolkit. Crafted with high-quality lithium cells, it slides into Bosch 18V housings and original chargers with a precise mold that clicks into place without jamming.

What you gain at a glance

With a 4.0Ah capacity, this battery offers more runtime between charges, so you can keep working on heavy tasks like sawing, drilling, and driving screws longer before reaching for a charger. The fade-free power curve aims to maintain performance as the battery discharges, so you’re not surprised by a sudden drop in speed or torque.

  • 4.0Ah high capacity for extended sessions
  • Fade-free power for consistent performance
  • Intelligent BMS with multi-level protections
  • LED power indicator for quick status checks

Compatibility and versatility

Designed for the Bosch 18V ecosystem, this replacement powers drills, hammer drills, impact drivers, circular saws, jigsaws, and grinders. Models include BAT609, BAT609G, BAT618, BAT618G, BAT619, BAT619G, BAT610G, BAT612, and related chargers. This can bring older tools back to life with refreshed energy.

  • Wide compatibility with Bosch 18V tools
  • Precise molding ensures easy, drop-in fit

Safety and reliability you can rely on

The pack uses high-quality cells and a protected Battery Management System to guard against over-charging, over-discharging, over-current, over-voltage, and overheating. It’s CE, FCC, and RoHS compliant, supporting safe and reliable use during long workdays.

With the integrated LED indicator, you can quickly gauge remaining power without pulling tools off the job. And if you ever have questions about compatibility or installation, the 12-month warranty and responsive support team are ready to help.

Usage tips to get the most from your battery

  • Charge with the original Bosch charger to preserve compatibility and performance.
  • Avoid exposing the battery to extreme temperatures; aim for a moderate, ventilated workspace.
  • Store at partial charge (around 40–60%) if you won’t use it for an extended period.

FAQ

Q: What Bosch models does this battery support?

A: Fits Bosch 18V models including BAT609/609G/618/618G/619/619G/610G/612 and compatible chargers.

Q: What safety protections does the battery include?

A: Integrated BMS guards against over-charging, over-discharging, over-current, over-voltage, and overheating.

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