The choice of batteries may seem like an innocuous purchase, but it has environmental consequences. From mining the raw materials to the moment they are discarded, these products have a greater environmental impact than expected. But are rechargeable batteries always the most sustainable option? DECO PROteste analyzed the life cycle of disposable and rechargeable batteries and explains how to make more conscious choices and reduce waste generation.
Although disposable batteries may offer greater autonomy per use, they must be replaced when they run out of energy, creating new waste. Rechargeable batteries, on the other hand, can be used many times, reducing the need to buy new units and, consequently, the amount of waste produced.
To understand the differences, DECO PROteste analyzed the life cycle of the two types of batteries, considering a usage scenario for a family of three over one year. In the case of disposable batteries, 26 units would be needed to power a TV remote control and three computer mice. In the rechargeable alternative, eight batteries would suffice, subjected to 31 charging cycles in total.
The analysis took into account the different stages of the life cycle, from the extraction of raw materials, manufacturing, to use and waste treatment. For rechargeable batteries, the impact associated with the production of the charger was also accounted for.
The results show that, in the scenario analyzed, the production of disposable batteries represents 85% of their environmental impact, followed by transport (9%) and end-of-life (6%). On the other hand, for rechargeable batteries, the distribution is different. The production of the charger represents 55% of the environmental impact, while the manufacture of the batteries accounts for 43%. Transport contributes 1.7% and use for only 0.3%. The end-of-life phase shows a negative contribution of 0.1%, associated with packaging recycling.
These results highlight the importance of extending the lifespan of equipment and making the most of the charging cycles of rechargeable batteries. Since charger production accounts for a significant portion of the environmental impact in this option, using it longer and sharing it among different devices helps avoid the need to purchase new chargers.
Choosing between disposable and rechargeable batteries is only part of the solution. There are other precautions that can help reduce environmental impact:
- Prioritize rechargeable batteries in devices that are used frequently, especially when there is a need to replace batteries regularly, allowing you to take advantage of multiple charging cycles;
- Extend the life of the batteries, to that end it is important to follow the manufacturer’s instructions, use a compatible charger and avoid exposure to extreme temperatures;
- Avoid unnecessary purchases, by using batteries that already exist at home before buying new units and buying only the quantities needed.
- Dispose of used batteries correctly, never placing disposable or rechargeable batteries in general waste or in recycling points intended for packaging. They should be handed over at specific collection points, available in various retail outlets and eco-centres.
Small choices make a difference both in terms of sustainability and the cost-effectiveness/reuse of batteries. Extending the life of products and ensuring proper waste disposal are important steps to reduce the consumption of natural resources and contribute to a more circular economy.
