The redesigned STIHL AK 20 Battery brings increased performance and reliable endurance to your AK System tools. Engineered to deliver full power output throughout its entire run time, this 36V lithium-ion battery ensures your equipment maintains peak speed and torque until the charge is fully depleted. Its compact, lightweight profile makes it the "sweet spot" for homeowners seeking a perfect balance between extended run time and tool maneuverability.
Monitoring your project's progress is simple with the easy-to-read LED display, which provides an instant visual of the battery's remaining charge. Designed for long-term reliability, the AK 20 features minimal loss of charge during storage, meaning it's ready to work when you are. It is the ideal power source for mid-range AK series tools, providing optimized run times for the MSA 120 C-B chainsaw, FSA 60 R trimmer, and the HTA 50 pole pruner.
Performance Upgrade: With 144 Wh of energy, the AK 20 offers double the capacity of the AK 10 while remaining significantly lighter than the AK 30. This makes it a top choice for handheld tools like the BGA 57 blower and SHA 56 shredder vac, where keeping the total unit weight low is essential for comfort.
Key Features & Benefits
- Consistent Power Delivery: Maintains 100% performance levels with no power drop-off during use.
- Intelligent LED Display: Four green LEDs keep you informed of the current charge status and power content.
- Optimal Power-to-Weight Ratio: Provides 144 Wh of energy at a manageable weight of just 2.6 lbs.
- Minimal Self-Discharge: High-quality cells ensure the battery retains its charge even after weeks of storage.
- Versatile Compatibility: One battery powers all tools within the STIHL AK-System.
Technical Specifications
| Manufacturer Part Number | 4520 400 6536 (Updated Version) |
| Battery Series | AK System |
| Energy Content | 144 Wh |
| Rated Voltage | 36 V |
| Weight | 2.6 lbs (1.2 kg) |
| Rated Capacity | 4.0 Ah |
