<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>chmod775</author><text>&amp;gt; A fire extinguisher large enough for a 500wh battery weighs 12 kilos - most people can barely lift that!&lt;p&gt;Almost everyone can lift that &lt;i&gt;overhead&lt;/i&gt;. 90% of men and more than 50% of women can lift a bit more than &lt;i&gt;twice&lt;/i&gt; that overhead. It&amp;#x27;s a common job requirement.&lt;p&gt;There would have to be something really wrong for an adult to struggle lifting 12kg. That&amp;#x27;s a large watermelon, and unlike the melon, the fire extinguisher got a handle.&lt;p&gt;Handheld fire extinguishers top out at that weight - because the vast majority of people will be able to use them and it&amp;#x27;s better to have two than make them any bigger.</text><parent_chain><item><author>ClumsyPilot</author><text>Lithium battery fire cannot be &amp;#x27;put out&amp;#x27;- in a normal sense. A fuel tank of petrol needs oxygen to burn, and when you spray foam on it your cut off the oxygen and the fire stops.&lt;p&gt;A battery already contains energy, all the chemicals required for the reaction are already present, and once the energy release starts, sealing it from the environment does not stop the process.&lt;p&gt;Ebike and drone batteries are large enough to be properly dangerous and fire departments make noises about them but offer no solutions. A fire extinguisher large enough for a 500wh battery weighs 12 kilos - most people can barely lift that!&lt;p&gt;We have no traceability in the battery supply chain and there is no &amp;#x27;battery safety box&amp;#x27; that I could readilly buy. It is not clear if an average metal furniture would contain it. And the regulator is sleeping on the job.</text></item></parent_chain></comment><story><title>Li-ion battery warehouse fire put out with Portland cement (2021)</title><url>https://abc7chicago.com/morris-fire-update-evacuation/10849672/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>z991</author><text>&amp;gt; there is no &amp;#x27;battery safety box&amp;#x27; that I could readilly buy&lt;p&gt;Take a look at Bat-Safe LiPo boxes.  They are designed to contain the heat and prevent your entire house from going up from a drone battery fire.</text><parent_chain><item><author>ClumsyPilot</author><text>Lithium battery fire cannot be &amp;#x27;put out&amp;#x27;- in a normal sense. A fuel tank of petrol needs oxygen to burn, and when you spray foam on it your cut off the oxygen and the fire stops.&lt;p&gt;A battery already contains energy, all the chemicals required for the reaction are already present, and once the energy release starts, sealing it from the environment does not stop the process.&lt;p&gt;Ebike and drone batteries are large enough to be properly dangerous and fire departments make noises about them but offer no solutions. A fire extinguisher large enough for a 500wh battery weighs 12 kilos - most people can barely lift that!&lt;p&gt;We have no traceability in the battery supply chain and there is no &amp;#x27;battery safety box&amp;#x27; that I could readilly buy. It is not clear if an average metal furniture would contain it. And the regulator is sleeping on the job.</text></item></parent_chain></comment><story><title>Li-ion battery warehouse fire put out with Portland cement (2021)</title><url>https://abc7chicago.com/morris-fire-update-evacuation/10849672/</url></story>