Replacing batteries – What you should know

Battery lifespan depends on how a machine is used, charged and stored.
Deep discharge, irregular charging or long periods without use can all shorten battery life.

When replacement becomes necessary, it may seem straightforward to choose a battery with the correct voltage and dimensions.
In practice, there is more to consider.

Battery pack replacement

When replacing batteries, it is usually better to replace the full pack rather than one battery.
Mixing old and new batteries can lead to uneven charging, reduced performance and a shorter lifespan for the new battery.

Warranties (lithium)

If there is a problem with a lithium battery pack, always check the manufacturer's instructions or warranty conditions before opening it.
Opening the battery pack yourself may void the warranty.

Battery type and weight

Before replacing a battery pack, always check that the replacement matches the machine’s requirements.
This includes the correct battery type, voltage, dimensions, weight and polarity.
Polarity refers to the positive and negative terminals. These must match the machine’s wiring so the battery can be connected safely.

If you are considering switching to a different battery technology, such as lithium, additional checks may be required. Charger compatibility, the charging curve used by the installed charger and battery weight can all affect whether a battery conversion is suitable for your machine.
We cover these considerations in more detail in our article about changing battery types.

Overview - Common mistakes to avoid

Avoid these mistakes when replacing batteries:

• Replacing only one battery instead of the full battery pack

• Mixing different battery types, brands or ages in one machine

• Replacing batteries without checking machine weight and stability

• Using the wrong charger configuration or charging curve after replacement

• Connecting the battery pack incorrectly or reversing the polarity

• Loose, overtightened or ungreased battery terminals

• Opening a lithium battery pack without first checking warranty conditions

• Choosing a battery based on price alone

These mistakes can lead to reduced performance, shorter battery life, higher costs and possible safety risks.

Not sure which replacement you need?

When in doubt, contact our team.
We can help you identify the right replacement battery for your machine and check whether the battery pack, charger settings and charging curve match your machine’s requirements.