How do you store STIHL batteries correctly and charge them efficiently?

Properly storing and charging your STIHL batteries is crucial for a long battery life. In this blog post, we'll explain step-by-step how to best maintain your batteries. This way, you can always count on optimal performance from your STIHL equipment, whether you're a professional user or a hobby gardener.

Why is proper battery storage so important?

The lifespan and performance of your battery depend heavily on how you treat it, especially when not in use. Properly storing your batteries prevents unnecessary wear and tear and maintains maximum capacity.

Do you need to fully charge a battery before storing it?

In the past, you had to fully charge a battery before storing it. This was necessary due to the high risk of self-discharge in older battery technologies, such as nickel-cadmium batteries. Incorrect storage could lead to irreparable damage.

Fortunately, with the advent of modern lithium-ion batteries, this is no longer the case. The self-discharge of these batteries is negligible, often only 1 to 3% per year. This means you don't need to fully charge the battery for storage. In fact, it's even better to store the battery partially discharged, preferably with a charge level of 40% to 60%. This minimizes the stress on the battery cells and extends their lifespan. Only fully charge the battery immediately before its next use.

Storage of machines with built-in batteries

Some STIHL tools, such as the FSA 45 cordless grass trimmer , have a built-in battery that cannot be removed. In that case, it's important to store the tool properly. Tips for doing so:

1. Switch off the machine completely and remove the activation key.
2. Clean the machine thoroughly before storing it to ensure that no dirt remains that could affect its operation.
3. Store the machine in a cool, dry place, preferably frost-free. Avoid direct sunlight and moisture to prevent damage to the battery.

When do you recharge the battery?

After a long period of non-use, it's wise to recharge the battery just before starting the job. This ensures the battery maintains its full capacity and is ready for optimal performance. Please note that STIHL batteries can only be charged at temperatures above 5°C. The charger automatically interrupts the charging process if the temperature is too low or too high.

How do you store STIHL batteries correctly?

To ensure your STIHL batteries always remain in top condition, we've put together a handy checklist:

• Remove the battery from the machine and check its charge level. Two illuminated LEDs on the battery indicator indicate the ideal charge level for storage (40% to 60% charged).
• Clean the battery with a dry cloth to remove any dirt.
• Store the battery in a dry, cool place at temperatures between -10°C and +50°C. A dry cellar or well-insulated shed is ideal.
• Keep the charger separate from the battery and store it at temperatures between +5°C and +40°C.
• Protect the battery from direct sunlight and moisture.

Is it dangerous to overcharge a battery?

STIHL batteries are equipped with advanced safety mechanisms that prevent the battery from overheating or overloading. Once the battery is fully charged, the charger automatically stops the charging process. This means you can charge the battery overnight without worry. Counterfeit batteries and replicas often lack this protection, which can lead to dangerous situations such as overheating or even fire. Therefore, it's important to always use genuine STIHL batteries and chargers.

What about the memory effect?

The so-called memory effect, where a battery loses its capacity due to partial discharge, is a problem that primarily affects nickel-cadmium batteries. STIHL lithium-ion batteries are not affected by this effect. You can safely partially charge STIHL batteries without losing capacity.

The charge indicator on the STIHL battery

STIHL batteries have four LEDs that indicate their charge level, but they can also indicate malfunctions with the tool or battery. The LEDs glow green for about five seconds to indicate the charge level. If only one LED flashes green, it means the battery is almost empty.

Indicator light	Meaning
	The battery needs to be charged.
	The battery is charged 20-40%.
	The battery is 40-60% charged.
	The battery is 60-80% charged.
	The battery is 80-100% charged.
	The battery is too hot or too cold.
	The device is too hot.
	The device has a malfunction.
	The battery has a fault.

Safe and sustainable working with STIHL batteries

STIHL lithium-ion batteries offer a safe and long-lasting solution for powering your garden tools. With the right storage and charging methods, you can significantly extend the lifespan of your batteries and ensure reliable performance at all times.

Whether you're looking for new batteries, chargers, or advice on maintaining your STIHL equipment, we're here to help. Browse all our battery-powered garden tools on our website or contact one of our experts for more information and expert advice.