Description
The Stihl AP 20 Battery is a compact, 36 V lithium-ion battery designed for entry-level tools in the Stihl AP professional cordless system. With an energy content of around 144 Wh and a capacity of 4.0 Ah, it provides a cost-effective way to power lighter Stihl AP tools while still offering long working times and professional performance.
Available from Masseys in Swadlincote, Derbyshire, the Stihl AP 20 Battery is ideal for homeowners, grounds staff and contractors who want to add a lighter Stihl AP battery to their kit – or keep a handy spare alongside larger batteries like the Stihl AP 300 S Battery and the Stihl AP500S Battery
Shop all Stihl cordless and AP batteries at Masseys:
- Stihl AP Battery System – Professional cordless range
- All Stihl cordless machinery
- Stihl battery chargers – AL 101, AL 301, AL 301-4 & AL 501
Key reasons to choose the Stihl AP 20 Battery
Professional 36 V AP System battery – compatible with a wide range of Stihl AP cordless tools.- 144 Wh energy / 4.0 Ah capacity – ideal for lighter gardening, landscaping and property maintenance tasks.
- Lightweight at about 1.3 kg – reduces fatigue when used in handheld tools.
- IPX4 splash-resistant – designed for use in typical UK weather, including light rain.
- Cold start function – controlled cell warming allows operation down to approximately –20 °C.
- Intelligent battery management – delivers steady power from full charge down to low capacity.
- LED charge indicator – four LEDs show remaining charge at a glance.
Where the Stihl AP 20 Battery fits in the Stihl AP battery range
Within the Stihl AP System, the Stihl AP 20 Battery is the entry-level battery. It is perfect for tools that do not need the highest possible energy content, making it a great choice for hedge trimmers, lighter brushcutters and certain blowers, sprayers and lawn mowers used on modest-sized jobs.
For users who already own or are considering more power-hungry AP tools, you can step up through the range with:
- Stihl AP 200 Battery (187 Wh) – longer runtimes and more headroom for mid-range AP tools.
- Stihl AP 300 S Battery (281 Wh) – high-capacity pack for chainsaws, blowers and other demanding tools.
- Stihl AP 500 S Battery – top-end capacity and performance for intensive professional work.
If you are unsure which AP battery best suits your tools, our team at Masseys can help match the right battery to your workload and budget.
Key features & benefits
36 V lithium-ion power – part of the Stihl AP professional system
Rated at 36 V, the Stihl AP 20 Battery is designed specifically for the Stihl AP System – the professional cordless platform used on tools such as brushcutters, hedge trimmers, chainsaws, sprayers and pressure washers.- Once you own an AP battery, you can share it across multiple compatible AP tools, reducing the number of batteries you need to buy.
144 Wh energy & 4.0 Ah capacity
- The Stihl AP 20 Battery delivers around 144 Wh of stored energy with a 4.0 Ah nominal capacity, giving very usable runtimes on lighter AP tools.
- It is a good balancing point between weight and runtime when you do not need the extended capacity of larger packs.
Lightweight, compact and easy to handle
- At roughly 1.3 kg, the Stihl AP 20 Battery is one of the lightest AP batteries, which helps keep the overall tool weight down – particularly important for long-reach or above-shoulder work.
- The compact casing makes battery changes quick and intuitive in the field.
Built for outdoor work – IPX4 & cold start
- IPX4 moisture protection means the battery is designed to withstand splashes and use in rainy conditions common in UK gardens and job sites.
- The cold start function gently warms the cells before delivering full output, enabling reliable operation down to about –20 °C when used correctly.
Intelligent battery management & LED display
- An intelligent battery management system helps deliver consistent power right through the discharge curve, instead of fading significantly as the battery empties.
- Four LED indicator lights show the remaining charge and charging status at the press of a button.
Compatible tools & typical applications
The Stihl AP 20 is designed primarily for entry-level and lighter-duty tools within the AP System, and is suitable for domestic, semi-professional and professional users who do not require maximum runtime on every task.
Typical applications include:
- Hedge trimming – for example with AP-system hedge trimmers such as the
Stihl HSA 140 R Hedge Trimmer or Stihl HSA 100. - Brushcutting and strimming – on tools like the Stihl FSA 86 R Strimmer (AP Range).
- Blowing and clearing – with blowers such as the Stihl BGA 86 Cordless Blower,
particularly for lighter jobs and shorter bursts. - Cleaning and spraying – great for tools like the Stihl REA 100 PLUS Cordless Pressure Washer and Stihl SGA 85 Cordless Sprayer, where a lighter battery is an advantage.
- Light chainsaw and pruning work – suitable for some AP top-handle and rear-handle saws when used for shorter cuts and lighter work (for extended or demanding use, a larger battery such as the
AP 300 S is generally recommended).
Exact runtimes vary by tool, material and working style, but typical examples published by Stihl show well over an hour of hedge trimming on some trimmers and over 200 m² of mowing on suitable cordless mowers
when using the AP 20.
Charging the Stihl AP 20 – compatible chargers & charge times
The Stihl AP 20 Battery can be charged with the following Stihl chargers:
- AL 101 standard charger
- AL 301 quick charger
- AL 301-4 multiple bay charger
- AL 501 high-speed charger
Typical charge times (from Stihl data) range roughly from about 25–40 minutes to reach 80–100% on the AL 501,
up to around 125–160 minutes on the AL 101 standard charger
You can find all these chargers on our dedicated page:
https://www.masseys-diy.co.uk/stihl-battery-chargers/
Technical specifications – Stihl AP 20 Battery
- Battery name: Stihl AP 20 Battery
- Battery system: Stihl AP System (professional cordless)
- Battery type: Lithium-ion
- Rated voltage: 36 V
- Capacity: approx. 4.0 Ah
- Energy content: approx. 144 Wh
- Battery weight: around 1.3 kg
- Protection rating: IPX4 (splash-resistant)
- Operating temperature range: down to approx. –20 °C with cold start function
- Charge indicator: 4-LED status display
- Expected life: up to around 1,200 charging cycles under normal use (guide value)
- Compatible chargers: AL 101, AL 301, AL 301-4, AL 501
Compare with other Stihl AP batteries at Masseys
If you need more runtime or power than the AP 20 can provide, consider these alternatives:
- Stihl AP 200 S Battery – similar capacity with added Stihl Connected functionality.
- Stihl AP 300 S Battery – high-capacity option for demanding professional tools.
- Stihl AP 500 S Battery – maximum capacity and performance in the AP line-up.
Official Stihl information (external link)
For the latest manufacturer data and working-time charts for specific tools, see the official Stihl UK
page for this battery:
Why buy your Stihl AP 20 Battery from Masseys?
- Authorised Stihl dealer – genuine AP System batteries and tools, with full access to Stihl support.
- Huge Stihl cordless display – including AP, AK and AS battery ranges in our Swadlincote showroom.
- Knowledgeable staff – we can match AP batteries to your existing or planned tools and advise on runtimes.
- On-site workshop – for servicing, repairs and warranty work on Stihl machinery.
- Open 7 days a week – visit when it suits you, or order online for convenient delivery.
If you are building or expanding a Stihl AP cordless kit and need a lightweight, versatile battery for lighter tools, the Stihl AP 20 Battery from Masseys is an excellent starting point or additional pack.
Pair it with our range of Stihl AP System tools and Stihl battery chargers for a complete cordless solution.
