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Explosion/Fire Risk of 18650 Li-ion Batteries?
- Thread starter LoneRanger
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Originally Posted By: LoneRanger
..This protected cell right here from that site looks like the ticket, I think LG is one of the trusted brands.
http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=561
That's a good battery. Just make sure its 69.2mm length will fit in your flashlight.
This is another good choice:
http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=289
..This protected cell right here from that site looks like the ticket, I think LG is one of the trusted brands.
http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=561
That's a good battery. Just make sure its 69.2mm length will fit in your flashlight.
This is another good choice:
http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=289
LoneRanger
Thread starter
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Even though I'm still getting a better battery, I checked both the UltraFires with my multi meter and the charger charged each to exactly 4.2v. Both remained at room temperature while being charged.
says nothing for capacity,internal resistance,ect.
many "whateverfire" cells are tired,wornout,recycled from trash laptop packs.
the worst thing is this garbage comes packed with 2 cell lights that run fine on 1 cell as they use a buck converter.and they claim protection but the gold contact merely covers the spotwelds left from their previous life in a laptop pack.so you reverse the first of the pair that runs down as they are nowhere near matched.
BOOM!!!!!
my short list of battery dealers.
illumn
mountain
Originally Posted By: LoneRanger
Even though I'm still getting a better battery, I checked both the UltraFires with my multi meter and the charger charged each to exactly 4.2v. Both remained at room temperature while being charged.
many "whateverfire" cells are tired,wornout,recycled from trash laptop packs.
the worst thing is this garbage comes packed with 2 cell lights that run fine on 1 cell as they use a buck converter.and they claim protection but the gold contact merely covers the spotwelds left from their previous life in a laptop pack.so you reverse the first of the pair that runs down as they are nowhere near matched.
BOOM!!!!!
my short list of battery dealers.
illumn
mountain
Originally Posted By: LoneRanger
Even though I'm still getting a better battery, I checked both the UltraFires with my multi meter and the charger charged each to exactly 4.2v. Both remained at room temperature while being charged.
Originally Posted By: kc8adu
says nothing for capacity,internal resistance,ect.
many "whateverfire" cells are tired,wornout,recycled from trash laptop packs.
the worst thing is this garbage comes packed with 2 cell lights that run fine on 1 cell as they use a buck converter.and they claim protection but the gold contact merely covers the spotwelds left from their previous life in a laptop pack.so you reverse the first of the pair that runs down as they are nowhere near matched.
BOOM!!!!!
my short list of battery dealers.
illumn
mountain
Originally Posted By: LoneRanger
Even though I'm still getting a better battery, I checked both the UltraFires with my multi meter and the charger charged each to exactly 4.2v. Both remained at room temperature while being charged.
Ok, that may be true but it's not relevant to this thread, the original poster explicitly stated he is using a single cell flashlight.
OP, if those cells hold 4.2v after a day or two, or even close to 4.2v I'd use them without hesitation. Monitor them with charging. Like kc8adu I think flashlights using multiple cells pose greater risk and little benefit. I don't see a big risk here, besides the batteries being overcharged by a crummy charger and nobody noticing.
says nothing for capacity,internal resistance,ect.
many "whateverfire" cells are tired,wornout,recycled from trash laptop packs.
the worst thing is this garbage comes packed with 2 cell lights that run fine on 1 cell as they use a buck converter.and they claim protection but the gold contact merely covers the spotwelds left from their previous life in a laptop pack.so you reverse the first of the pair that runs down as they are nowhere near matched.
BOOM!!!!!
my short list of battery dealers.
illumn
mountain
Originally Posted By: LoneRanger
Even though I'm still getting a better battery, I checked both the UltraFires with my multi meter and the charger charged each to exactly 4.2v. Both remained at room temperature while being charged.
Ok, that may be true but it's not relevant to this thread, the original poster explicitly stated he is using a single cell flashlight.
OP, if those cells hold 4.2v after a day or two, or even close to 4.2v I'd use them without hesitation. Monitor them with charging. Like kc8adu I think flashlights using multiple cells pose greater risk and little benefit. I don't see a big risk here, besides the batteries being overcharged by a crummy charger and nobody noticing.
LoneRanger
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Yes, two 18650's were included but it is a single cell light.
LoneRanger
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Not that anyone cares, but the spare UltraFire is still holding 4.2v sitting around on the shelf as of today. According to my analog mm.
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