Short answer: lithium-ion power tool batteries never go in household trash. They're classified as hazardous waste in most jurisdictions, and they cause real fires in garbage trucks and recycling facilities. The good news is that disposal is easier than most people think — and there are several routes depending on where you are.
Let's cover the safe options and, importantly, how to handle a pack that's already failing.
Why You Can't Just Bin Them
A lithium-ion pack in a bin is a fire waiting for a trigger. Trucks and sorting facilities compact waste with heavy machinery. A punctured lithium cell can go into thermal runaway inside a truck full of paper and plastic. That's not a theoretical risk — battery-caused fires in waste facilities are a well-documented, growing problem.
The cells are also valuable materials. Cobalt, nickel, copper, and lithium can be recovered. Binning them wastes materials that are expensive to mine.
What You'll Need
- Electrical tape (to cover the terminals)
- A non-conductive bag or the original packaging
- Access to a drop-off point (see routes below)
Step 1 — Check the Pack's Condition First
Before transporting anything, assess the pack.
- Normal, just old: cover the terminals and transport normally.
- Swelling, hot, or damaged: don't transport it in a normal way — see Step 4.
⚠️ If the pack is swelling or has been punctured, treat it as a fire risk until proven otherwise.
Step 2 — Tape the Terminals
This is the single most important step and the one most people skip. Cover the metal terminals with electrical tape so nothing can bridge them in transit or in a collection bin. Even in a bin full of other batteries, a taped pack can't short against a stray tool or another pack's contacts.
Do this for every pack you're taking in, good or bad.
Step 3 — Use a Proper Drop-Off Route
Where you take it depends on where you are.
- Retail battery take-back. Most home improvement stores have a battery collection point near the entrance, and they take rechargeable packs.
- Municipal household hazardous waste. Cities and counties run periodic drop-off events or permanent facilities for batteries and e-waste.
- Recycling centers. Dedicated e-waste recyclers accept lithium packs, often for free.
- Manufacturer programs. Some tool brands run their own take-back via their service network.
Call ahead for hours and any size limits. Most take tool packs without question, but a few limit quantity per visit.
Step 4 — Handling a Swollen or Damaged Pack
A swollen or punctured pack needs more care than a taped old one.
- Don't try to force it into a collection bin where it might be crushed.
- Place it in a metal container, resting on sand or a non-combustible surface, away from anything flammable.
- Take it directly to a hazardous waste facility — not a curbside bin or a retail drop-box — and tell them what it is.
- If it's hot, smoking, or venting, keep people away and move it outside onto bare concrete or ground if you can do so safely, then let it burn out.
When in doubt, call the local hazardous waste facility and describe the condition. They handle these routinely.
Step 5 — Consider Reuse First
Before disposing, ask whether the pack is actually dead. A pack that's stopped working in one tool might be fine, or a pack that's lost capacity might still run lower-draw tools around the shop. If it's a quality pack and only moderately faded, it may have a second life.
If the pack is genuinely at end of life and you're replacing it across a fleet, our Dewalt-compatible battery range covers real, capacity-rated replacement packs so you're not back here in a month.
Don't Do These
- Don't bin it. Not in household trash, not in a recycling bin, not in a dumpster.
- Don't open it up to salvage cells unless you know exactly what you're doing — punctured cells and unexpected shorts cause injuries.
- Don't put multiple loose packs in a bag without taping terminals first.
- Don't burn it. Burning a lithium pack releases toxic gas and can cause a violent reaction.
Frequently Asked Questions
Can I throw power tool batteries in the trash?
No. Lithium-ion packs are hazardous waste in most areas and cause serious fires in waste trucks and facilities. They must go to a battery take-back point, household hazardous waste facility, or e-waste recycler.
Where can I recycle old power tool batteries?
Most home improvement stores have battery collection points. Municipal household hazardous waste events, dedicated e-waste recyclers, and some manufacturer take-back programs also accept them — usually for free.
Do I need to tape the terminals before recycling?
Yes. Cover the metal terminals with electrical tape so nothing can bridge them in transit or in a collection bin. It prevents shorts and fires and takes seconds per pack.
What should I do with a swollen battery?
Treat it as a fire risk. Don't force it into a normal bin. Place it in a metal container on a non-combustible surface, away from flammables, and take it directly to a hazardous waste facility, telling them what it is.
Is it worth repairing an old battery instead of disposing of it?
Rarely, for consumer packs. Cell-level replacement requires matched cells and careful BMS handling, and the result is often not cost-effective for a single pack. Reuse in a lower-draw tool, or replacement, is usually the better path.