<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>askvictor</author><text>If they&amp;#x27;re from laptops the cells should be safe (as opposed to unknown new cells from AliExpress which may or may not be to spec); albeit not necessarily at maximum capacity. As long as appropriate protection circuitry is used, I don&amp;#x27;t see how using then hard would make any difference (laptops use batteries hard too).</text><parent_chain><item><author>ficklepickle</author><text>This sounds like it could be rather dangerous, no? Connecting up a bunch of old lithium cells of unknown origin and using them hard.&lt;p&gt;I&amp;#x27;d also worry about an insurance claim being denied if it burned my house down.&lt;p&gt;However, I very much approve of the DIY ingenuity and repurposing of old stuff.</text></item></parent_chain></comment><story><title>DIY Powerwall Builders Are Using Recycled Laptop Batteries to Power Their Homes</title><url>https://motherboard.vice.com/en_us/article/kzz7zm/diy-powerwall-builders-are-using-recycled-laptop-batteries-to-power-their-homes</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>Baeocystin</author><text>Kind of dangerous seems like quite the understatement, considering the nature of lithium batteries!&lt;p&gt;It&amp;#x27;d be fun to play with something like this for the learning, but I wouldn&amp;#x27;t actually run one unless it was in its own shed, many dozens of yards from the nearest anything else.  Lithium fires are no joke.</text><parent_chain><item><author>ficklepickle</author><text>This sounds like it could be rather dangerous, no? Connecting up a bunch of old lithium cells of unknown origin and using them hard.&lt;p&gt;I&amp;#x27;d also worry about an insurance claim being denied if it burned my house down.&lt;p&gt;However, I very much approve of the DIY ingenuity and repurposing of old stuff.</text></item></parent_chain></comment><story><title>DIY Powerwall Builders Are Using Recycled Laptop Batteries to Power Their Homes</title><url>https://motherboard.vice.com/en_us/article/kzz7zm/diy-powerwall-builders-are-using-recycled-laptop-batteries-to-power-their-homes</url></story>