Lithium-ion battery safety 101

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snerkler
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jon_slider wrote:
here is a runtime test, to help visualize how different output levels behave:

.
pic is a link to a review with more details


Thanks, interesting that if you want any kind of decent runtime it has to be below 1000 lumens. I’ve no idea whether that will be bright enough as my current light ‘claims’ to be 2500 lumens but the fact it runs off 3 x AAA alkaline batteries, and my friend’s Exposure Diablo that claims to be 1800 lumens is much brighter, clearly my current light is not 2500 lumens.
snerkler
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Hi,

The link in the original post isn’t working and I was wondering what the best way is to ‘store’ batteries when the flashlight is not being used for an extended period of time? For non-protected Li-ion batteries is it best to remove from the light and store in a plastic case, or is it best to leave in the light so that it benefits from the low voltage protection supplied by the flashlight (Anduril). Likewise for a protected battery, I assume for a protected battery its own LVP would protect it regardless?

Any help would be appreciated.

Lightbringer
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Which link? There are like 80 links in just that post #1…

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

snerkler
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Lightbringer wrote:
Which link? There are like 80 links in just that post #1…

Sorry, the one regarding long term storage.
Notmyrealname
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snerkler wrote:
jon_slider wrote:
here is a runtime test, to help visualize how different output levels behave:

.
pic is a link to a review with more details


Thanks, interesting that if you want any kind of decent runtime it has to be below 1000 lumens. I’ve no idea whether that will be bright enough as my current light ‘claims’ to be 2500 lumens but the fact it runs off 3 x AAA alkaline batteries, and my friend’s Exposure Diablo that claims to be 1800 lumens is much brighter, clearly my current light is not 2500 lumens.

You may know this already but beam characteristics can make a big difference in the perceived brightness of a flashlight. At the same distances a floody beam has the lumens spread over a wider area. A lower lumen narrower beam can have higher lux and can appear much brighter because the lumens are concentrated in a smaller area.
That can make it hard to judge the lumen output of a light.

I feel sorry for people who don't have a hobby or interest to escape to.

snerkler
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Notmyrealname wrote:
snerkler wrote:
jon_slider wrote:
here is a runtime test, to help visualize how different output levels behave:

.
pic is a link to a review with more details


Thanks, interesting that if you want any kind of decent runtime it has to be below 1000 lumens. I’ve no idea whether that will be bright enough as my current light ‘claims’ to be 2500 lumens but the fact it runs off 3 x AAA alkaline batteries, and my friend’s Exposure Diablo that claims to be 1800 lumens is much brighter, clearly my current light is not 2500 lumens.

You may know this already but beam characteristics can make a big difference in the perceived brightness of a flashlight. At the same distances a floody beam has the lumens spread over a wider area. A lower lumen narrower beam can have higher lux and can appear much brighter because the lumens are concentrated in a smaller area.
That can make it hard to judge the lumen output of a light.


Thanks, yeah I appreciate that. After trial and error I’m finding roughly 800-1000 lumens on a flood beam works for us. I’m basing this on my P20ix being 850 lumen in high.

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