Red, Yellow, and Green Battery Labels: Meaning and Safe Classification of Lithium-Ion Batteries
When handling lithium-ion batteries, a reliable assessment of the battery’s condition is crucial for safety in day-to-day operations. In practice, a classification system based on the traffic light principle has become established for this purpose. Batteries are divided into the categories green, yellow, and red. This classification enables a quick assessment and forms the basis for appropriate measures during storage, transport, and further handling.
This clear classification helps identify risks early on, reduce potential hazards, and establish appropriate safety measures.
Classification of Lithium-Ion Batteries Using the Traffic Light System
The classification into green, yellow, and red serves to standardize the assessment of different battery conditions. It establishes a clear framework for the safe handling of lithium-ion batteries and helps companies design operational processes that are both safe and traceable.
Green Label – New and Like-New Batteries
Batteries labeled green are new, like-new, or fully functional lithium batteries and lithium-ion rechargeable batteries. They are in perfect condition and can be used in regular operation.
Characteristics of green batteries
Brand new or as good as new
Fully functional
No mechanical damage
No deformations or leaks
No unusual heat generation
These batteries can be charged, stored, and transported without additional restrictions. However, regardless of their condition, the general safety requirements for handling lithium-ion batteries should always be followed.
Yellow Labeling – Defective Batteries Without Immediate Hazard
Batteries labeled yellow are defective lithium batteries that already show signs of damage or impaired functionality but do not currently pose an immediate hazard.
They may no longer be used without restriction and require special precautions during storage, handling, and transport.
Characteristics of yellow batteries
Damage to the casing
Impaired functionality
Reduced performance
Abnormal charging behavior
Mechanical damage without immediate hazard
For these batteries, the use of suitable safety containers and compliance with applicable hazardous materials regulations are particularly important.
Red Label – Critically Defective Batteries with Increased Risk Potential
Batteries labeled red are critically defective lithium batteries that may pose a significant hazard.
In this condition, there is an increased risk of so-called thermal runaway. During thermal runaway, the battery can overheat uncontrollably and cause smoke, dangerous gases, or even fires.
Characteristics of red batteries
Severe deformation
Smoke or odor
Excessive heating
Signs of fire
Leaking fluids
Severe mechanical damage
These batteries must not be reused and must be secured and isolated immediately; they must be stored and transported only under appropriate safety measures.
Importance of Classification for Occupational Safety and Organization
Classification based on the traffic-light system enables a quick and transparent risk assessment. Companies can use this as a basis to define appropriate measures and reliably comply with legal requirements.
This structured classification supports, in particular:
the safe storage of lithium-ion batteries
the selection of suitable transport solutions
compliance with hazardous materials regulations
the reduction of fire and safety risks
the clear separation of different battery states
Especially in industry, logistics, workshops, recycling facilities, and service areas, uniform labeling is an important component of a comprehensive safety concept.
Different Requirements for Storage and Transport
Depending on the classification, there are different requirements for the safe handling of lithium-ion batteries.
Overview of Safety Measures
Green: Standard measures are sufficient for new and like-new batteries
Yellow: Use of suitable safety containers and additional protective measures required
Red: Special safety concepts, fire protection solutions, and isolated storage are necessary
These include, among other things, certified transport containers, suitable packing materials, and separately designated storage areas for damaged or critically defective batteries.
A professional assessment of the battery’s condition forms the basis for all further steps in the safe and legally compliant handling of lithium-ion batteries.
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