If you are looking to invest in the STIHL cordless range, you’ve likely noticed two main “families” of batteries: the AK System and the AP System. At first glance, they look similar—both are 36V lithium-ion batteries and share the same iconic orange and grey branding. However, choosing the wrong one can be a costly mistake, as these systems are not interchangeable.
In this guide, we break down the key differences to help you decide which power source is right for your garden.
- The User: Homeowner vs. Professional
The most fundamental difference lies in who the tools were designed for:
- The AK System: Engineered for homeowners with medium-to-large domestic gardens. These tools are lightweight, easy to handle, and priced competitively for the casual user.
- The AP System: Built for professional landscapers, arborists, and owners of very large estates. These tools are rugged, designed for daily “all-day” use, and offer significantly higher torque and durability.
- Weather Resistance & IP Ratings
A major technical divide is how they handle the British weather.
- AP Batteries (like the AP300S or AP500S) are rated IPX4 splash-proof. This means professionals can continue working in the rain without damaging the battery or the tool.
- AK Batteries are not rated for wet weather use. They are designed for “fair-weather” gardening, and STIHL recommends storing and using them only in dry conditions.
- Tool Compatibility
The batteries are physically different shapes to prevent cross-contamination.
- AK Tools (e.g., MSA 70 C-B chainsaw, BGA 60 blower) only accept AK 10, AK 20, and AK 30S batteries.
- AP Tools (e.g., MSA 220 C-B chainsaw, BGA 200 blower) only accept AP-style batteries or the AR L backpack batteries.
Note: While the batteries don’t swap, the chargers do! High-end chargers like the AL 301 and AL 501 can charge both AK and AP batteries, making it easier to manage a “mixed” fleet of tools.
- Performance & Runtime
While both systems run on 36 volts, the “juice” inside differs. The AP system generally offers higher capacity (Watt-hours) and more consistent power delivery. In the AK range, you’ll choose between the AK 10 (lightweight), AK 20 (mid-range), and AK 30 (high capacity). In the AP range, the AP 500 S uses advanced Power Laminate technology to deliver much higher current for heavy-duty tasks like felling trees.
Summary Table: AK vs. AP
Feature | AK System | AP System |
Primary Use | Domestic / Homeowner | Professional / Large Estate |
Weatherproof | No | Yes (IPX4) |
Weight | Very Lightweight | Robust / Heavier |
Warranty | 2-Year Domestic | 2-Year Professional* |
Backpack Battery | No | Yes (AR Series) |
Which Should You Choose?
If you have a standard suburban garden and need to trim hedges and mow the lawn on weekends, the AK System offers the best value for money. However, if you are a professional who needs to work in all weathers, or a homeowner with several acres of land and thick brush to clear, the AP System is a vital investment for long-term reliability.
Still not sure which STIHL battery is right for your kit? Visit us at Godfreys in Sevenoaks, and our expert team can show you both systems in person!