What’s the Difference Between Alkaline and Lithium-Ion Batteries?
Identification and Proper Disposal
We rely more and more on battery-powered devices in our daily lives. Specifically the world is using more and more lithium-ion batteries. In 2023, the world spent a lot of money on them — about $54 billion! That number is forecasted to continue to grow — 20% every year — all the way until 2030!
It’s important to understand the types of batteries we use, how to tell them apart, and the best way to safely dispose of them. Here’s a quick guide to help you distinguish between alkaline and lithium-ion batteries, and how to recycle them responsibly.
Alkaline vs. Lithium-Ion: What’s the Difference?
Alkaline Batteries
These are the standard, disposable batteries you likely use in remote controls, flashlights, toys, and wall clocks. They come in familiar sizes like AA, AAA, C, D, and 9V. Alkaline batteries are typically single-use and made with a zinc-manganese dioxide chemistry.
Lithium-Ion Batteries
These are rechargeable batteries found in devices like smartphones, laptops, power tools, and electric toothbrushes. They are known for their high energy capacity and long lifespan. Lithium-ion batteries come in a variety of shapes and sizes and may be built into the devices themselves.
How Can Consumers Identify the Difference?
Check the Label:
Most batteries are clearly labeled. Look for terms like “alkaline” or “Li-ion” (short for lithium-ion). Please note that not all lithium batteries are rechargeable.
Look at the Use Case or Packaging:
If it’s a one-time-use battery in a household item, it’s likely alkaline. If it powers a rechargeable device, it’s most likely lithium-ion.
Battery Shape:
Alkaline batteries usually have a cylindrical shape (AA, AAA, etc.), while lithium-ion batteries can be cylindrical, rectangular, or even flat, depending on the device.
Weight and Price:
Lithium-ion batteries are often lighter than Alkaline batteries. They are also usually more expensive due to their higher energy density.
Proper Disposal and Recycling Tips
Alkaline Battery Disposal
In Illinois and many other states, standard alkaline batteries can legally be disposed of in your regular household trash. However, we recommend checking with your local municipality or using a battery recycling service to keep heavy metals out of landfills whenever possible.
Lithium-Ion Battery Disposal
These should never go in the trash or recycling bin. Lithium-ion batteries can pose a fire risk when punctured or damaged. They will cause fires within you local garbage trucks and at waste collection facilities. Instead, bring them to a certified e-waste recycling center or drop-off site. Many electronics retailers (like Best Buy, Home Depot or Staples) also offer safe battery recycling.
Keep a small container in your home labeled “Used Batteries” and drop them off at a local recycling event or partner store when full. This small habit can make a big environmental difference! Cover the ends of your used or “dead” batteries with electrical or packaging tape during storage. When batteries are stored together or transported, their terminals can touch, causing a short circuit. This can lead to overheating, sparking, and potentially a fire according to the EPA.
When you have a small collection of used batteries, visit www.call2recycle.org to find a collection location near you or simply click the button below.
Why Battery Identification Matters
Proper battery disposal helps prevent hazardous materials from entering our landfills and water systems. It also helps reduce the risk of fires in trash collection trucks and recycling facilities. At Homewood Disposal, we’re committed to keeping our communities informed, safe and sustainable. For more information on recycling events or what items we accept, visit our Recycling Guidelines page.