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What Is the STIHL AK Battery System?
The AK System is STIHL’s mid-range cordless platform for domestic users. It runs on removable 36V batteries (AK 10, AK 20, AK 30), which can be used across multiple tools. You can mow the lawn, trim the hedge, blow leaves, and prune trees — all with one battery system.
Who Is the AK System For?
The AK range is ideal for UK homeowners with medium or large gardens. Whether you’re mowing the lawn, tidying up shrubs, or cutting firewood, these tools offer more power and runtime than entry-level cordless kits, while still being quiet and easy to use.
Main Benefits of the AK System
STIHL’s AK tools deliver consistent performance and simple operation. They’re lightweight, run cleanly with no emissions, and charge quickly using one of three compatible chargers. Built-in LED indicators show battery status, and the system is maintenance-friendly compared to petrol tools.
Battery Options and Runtime
There are three AK battery options — all interchangeable across the AK tool range:
| Battery Model | Capacity | Best For |
|---|---|---|
| AK 10 | ~115 Wh | Light trimming and short garden tasks |
| AK 20 | ~160 Wh | Mowing small-medium lawns, general use |
| AK 30 / AK 30 S | ~240–300 Wh | Heavier tools, larger lawns, longer jobs |
Compatible Tools in the AK System (UK Models)
The AK range includes the following STIHL tools in the UK:
- Chainsaws: MSA 60 C‑B, MSA 70 C‑B
- Hedge Trimmers: HSA 50, HSA 60
- Long‑Reach Hedge Trimmer: HLA 56
- Grass Trimmers: FSA 57, FSA 60 R, FSA 80
- Leaf Blowers: BGA 57, BGA 60, SHA 56 (vacuum/blower)
- Pole Pruner: HTA 50
- Lawn Mowers: RMA 235, RMA 248
- Scarifier: RLA 240
All tools are available individually or as kits with batteries and chargers. If you already own an AK battery, it works with every tool in the system.
Battery Charging Times and Compatibility
The AK batteries work with STIHL’s AL 101 and AL 301 chargers, these chargers are shared across both the AK and AP systems. LED lights show charge level and any faults, such as overheating or battery issues.
| Battery | Charger | Charge Time (80%) | Charge Time (100%) |
|---|---|---|---|
| AK 10 | AL 101 | 70 min | 95 min |
| AK 20 | AL 101 | 135 min | 165 min |
| AK 30 | AL 101 | 160 min | 205 min |
| AK 10 | AL 301 | 25 min | 45 min |
| AK 20 | AL 301 | 40 min | 55 min |
| AK 30 | AL 301 | 60 min | 75 min |
Is the AK System Worth It?
For most UK homeowners, the AK System hits the sweet spot. It’s a quieter, more convenient, and more environmentally friendly alternative to petrol, with enough power for serious garden jobs. If you’re a full-time professional or need longer runtimes, consider the STIHL AP System instead.