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Lithium battery fire extinguisher spray

Updated: 20 October 2026

A phone on the bedside table and an e-bike in the hall are not the same fire. A lithium battery fire extinguisher spray, in the only listing here that states a number, is a cooling aid for one small device under about 60 Wh that is already off charge. It is not a tool for an e-bike, an e-scooter or a mobility scooter. If that larger battery smokes, get everyone out, close the doors if you can, stay out and call 999. Peter F. took the 60 Wh guide from Firechief’s FLE500 sheet and the leave-now rule from Fire Kills, London Fire Brigade and the National Fire Chiefs Council. Prices are from our [fire extinguishing spray comparison](/hub/fire-protection/fire-extinguishing-spray). We did not burn a cell. A qualifying purchase can earn a commission at no extra cost to you.

A phone on the bedside table and an e-bike in the hall are not the same fire.

Our top picks

Super Help Super Help Fire Stop 400 ml

Best overall

Super Help Super Help Fire Stop 400 ml
7.6/10about £11.99
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Kidde Kidde Flame Out 500 ml

Best value

Kidde Kidde Flame Out 500 ml
4.6/10about £18.37
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Firechief Firechief Lith-Ex 500 ml, pack of 2

Alternative

Firechief Firechief Lith-Ex 500 ml, pack of 2
4.1/10about £69.96
View offer
On this page
  1. 1.One small device, not every battery
  2. 2.What the Firechief 500 ml can actually claims
  3. 3.Unplug, cool, and the chance it keeps burning
  4. 4.E-bikes and anything larger

One small device, not every battery

BAFE says a water-based extinguisher can be used to cool one small lithium-ion device — a phone, a laptop, an e-cigarette, a power tool — that is no longer on charge. The point of the water is cooling. Complete extinguishment may not happen. The clause does not cover several devices at once, and it does not cover larger packs. Lithium-ion is not Class D. Class D is combustible metals. Household examples on the Firechief listing are a phone, a charger, a laptop and a tablet. An e-bike battery is the hard stop. Fire Kills, London and the NFCC all say do not attempt to extinguish that fire. The general rule for any can — exit behind you, one discharge, then leave — is on how to use a fire extinguisher spray. Read it as the leave rule. Do not read it as encouragement to empty a can into a scooter.

What the Firechief 500 ml can actually claims

The kept lithium listing is Firechief Lith-Ex, model FLE500, ASIN B0H7FLGSV7: two 500 ml aerosols at about £69.96, not a single-can price. Wickes showed about £40 for one 500 ml can on a separate page. There is no amazon review line. The battery line is lithium-ion up to 60 Wh, plus class A solids. The maker’s sheet prints fire rating n/a, calls under 60 Wh a guide, claims manufacture to BS 6165:2019, and gives about 2 metres and up to about 90 seconds. Who the other sprays are for, when the fuel is paper or waste rather than a cell, is the best fire extinguisher spray page. The second can is a spare, not a reason to keep fighting.
Super Help Super Help Fire Stop 400 ml

Testsieger

Super Help Super Help Fire Stop 400 ml
7.6/10about £11.99
View offer

Unplug, cool, and the chance it keeps burning

BAFE’s condition is that the device is no longer on charge. Unplug the charger at the wall if you can do it without crossing smoke or flame. If the plug is already behind the fire, leave it. Cooling is not the same as “the fire is out”. BAFE says extinguishment may not happen. A cell can quieten and heat again. If smoke grows after the can is empty, leave. Ninety seconds on the Lith-Ex sheet is a short cool of a small object, not a hose.

E-bikes and anything larger

If an e-bike, e-scooter or mobility scooter smokes or catches fire, Fire Kills says get out, close doors if you can, stay out and call 999. London Fire Brigade says get out immediately and do not attempt to tackle it. The National Fire Chiefs Council says do not attempt to extinguish an e-bike or e-scooter battery fire. A 500 ml can guided under 60 Wh is not a loophole in that instruction. When the room is already full of smoke, you do not look for the Lith-Ex. You leave. The buying guide is where you check a class line and an expiry before you own any can. It will not give you a rating for a bicycle battery, because this set does not have one.

Common questions

Will a spray put out a phone battery?
It might cool one small phone that is off charge, which is the use BAFE describes for water-based media under BS 5306-8. BAFE also says complete extinguishment may not happen and the fire can be unpredictable. The Firechief guide is under 60 Wh. If the smoke builds or the cell heats again after the can is empty, leave and call 999. Do not treat a quiet five seconds as proof it is out.
What does under 60 Wh mean in the house?
On the Lith-Ex listing, the examples are a phone, a charger, a laptop and a tablet. The maker sheet calls less than 60 Wh a guide, and it prints the fire rating as n/a. A single laptop is the top of that household picture. A drawer of loose cells, two devices at once, or anything you only recognise as “the big battery” is outside the guide. We are not assigning a watt-hour number the sources did not print.
Must the device be unplugged first?
Yes, if you can do it without going through the fire. BAFE’s clause, as explained on that page, is for a device that is no longer on charge. Unplug at the socket when the socket is still safe to reach. If the charger is in the flames, leave the plug and leave the room. Cooling a battery that is still taking charge fights the charger as well as the cell.
Is lithium-ion a class D metal fire?
No. Class D is combustible metal. A lithium-ion phone or laptop is a rechargeable battery, and the guidance BAFE quotes is water-based cooling of one small device, not a Class D powder. The Lith-Ex listing adds ordinary class A solids. It does not call the battery a metal fire, and you should not either.
Can I use the Lith-Ex can on an e-bike?
No. The sheet’s guide is under 60 Wh, and Fire Kills, London Fire Brigade and the NFCC all say get out and do not tackle an e-bike or e-scooter battery fire. A pack of two 500 ml cans at about £69.96 does not change that. Wickes listed one 500 ml can at about £40 on a different page, so do not merge the prices. If the room is already full of smoke, do not search for the can. Close the door if you can, call 999, and stay out.

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Sources

Public UK sources and amazon.co.uk listings named in the research digest, last checked on 19 October 2026.

  1. BSI BS 6165:2019 summary, small disposable aerosol extinguishers (retrieved 19 October 2026)
  2. Regulatory Reform (Fire Safety) Order 2005, article 13 (retrieved 19 October 2026)
  3. GOV.UK: Fire safety in the home (retrieved 19 October 2026)
  4. London Fire Brigade: pan fires (retrieved 19 October 2026)
  5. Firechief FLE500 technical sheet (retrieved 19 October 2026)
  6. BAFE: extinguisher for a small lithium-ion battery (retrieved 19 October 2026)
  7. Kidde KFS-500 user guide (retrieved 19 October 2026)
  8. Super Help Fire Stop technical data sheet (retrieved 19 October 2026)