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Posted: 3/12/2015 10:24:24 PM EDT
Looking for the cheapest 18650 LED light I can find. We are standardizing on them for our heavy use lights here.... Why do I want cheap? OK you busted me. The real reason is that my 3 year old daughter has recently become obsessed with flashlights and has blasted through a small mountain of AAs in our cheapo LED lights. She's getting upgraded to rechargeable and all my rechargeable flashlights use 18650s.
Link Posted: 3/12/2015 10:56:39 PM EDT
http://intl-outdoor.com/xintd-c8-v4-xml2-t6-18650-flashlight-p-308.html
Link Posted: 3/13/2015 6:10:50 AM EDT
[Last Edit: 3/13/2015 6:11:32 AM EDT by ar-ak]
Amazon has a bunch under $10, but battery and charger are extra.
Link Posted: 3/13/2015 6:20:21 AM EDT
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.
Link Posted: 3/13/2015 8:52:35 AM EDT
Link Posted: 3/13/2015 12:46:17 PM EDT
Link Posted: 3/13/2015 6:50:51 PM EDT
Link Posted: 3/13/2015 7:59:26 PM EDT
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Originally Posted By raf:


What do you call high power? Can anyone expand on this?
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Originally Posted By raf:
Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000


What do you call high power? Can anyone expand on this?


I don't see many 18650 lights that put out less than 500 lumens on the top end. Lots of them are close to 1000. At that level the light puts out a huge amount of heat. Enough to burn someone. Unprotected cells would be extremely bad for a kid. You would ruin them as soon as they were over discharged the first time, if it didn't burn.
Link Posted: 3/13/2015 9:07:17 PM EDT
Link Posted: 3/13/2015 10:47:24 PM EDT
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Originally Posted By batmanacw:


I don't see many 18650 lights that put out less than 500 lumens on the top end. Lots of them are close to 1000. At that level the light puts out a huge amount of heat. Enough to burn someone. Unprotected cells would be extremely bad for a kid. You would ruin them as soon as they were over discharged the first time, if it didn't burn.
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Originally Posted By batmanacw:
Originally Posted By raf:
Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000


What do you call high power? Can anyone expand on this?


I don't see many 18650 lights that put out less than 500 lumens on the top end. Lots of them are close to 1000. At that level the light puts out a huge amount of heat. Enough to burn someone. Unprotected cells would be extremely bad for a kid. You would ruin them as soon as they were over discharged the first time, if it didn't burn.


So use protected cells.
Link Posted: 3/13/2015 10:56:07 PM EDT
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Originally Posted By bgenlvtex:


So use protected cells.
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Originally Posted By bgenlvtex:
Originally Posted By batmanacw:
Originally Posted By raf:
Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000


What do you call high power? Can anyone expand on this?


I don't see many 18650 lights that put out less than 500 lumens on the top end. Lots of them are close to 1000. At that level the light puts out a huge amount of heat. Enough to burn someone. Unprotected cells would be extremely bad for a kid. You would ruin them as soon as they were over discharged the first time, if it didn't burn.


So use protected cells.


Repeatedly draining a lithium ion battery all the way down until the protection kicks in will kill the battery in short order.
Link Posted: 3/13/2015 11:28:34 PM EDT
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Originally Posted By batmanacw:
Repeatedly draining a lithium ion battery all the way down until the protection kicks in will kill the battery in short order.
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unless you are buying really, really, and did i mention really cheap ass Chinese lights all are going to have low voltage shutoff built into the driver circuit. the shutoff can be anywhere from 3.2-2.8v so the cell remains safe.
Link Posted: 3/13/2015 11:32:22 PM EDT
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Originally Posted By The_Beer_Slayer:


this x1000
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Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000


I don't have any eneloops although I've heard you guys talking about them.

Can you charge them and leave them charged for long periods (6mo-year)?
Can they be substituted for any device that would normally hold the particular size?
Are they damaged by leaving them discharged for a prolonged period?
Any catches other than cost?

Also I appreciate the replies. I honestly had not thought about the safety aspects of using the lithium. She likes to turn the light on and then forget about it until it dies which I could see being a fire hazard if she dropped it into her toy box or something and it overheated.
Link Posted: 3/14/2015 12:05:14 AM EDT
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Originally Posted By LTCetme:


I don't have any eneloops although I've heard you guys talking about them.

Can you charge them and leave them charged for long periods (6mo-year)?
Can they be substituted for any device that would normally hold the particular size?
Are they damaged by leaving them discharged for a prolonged period?
Any catches other than cost?

Also I appreciate the replies. I honestly had not thought about the safety aspects of using the lithium. She likes to turn the light on and then forget about it until it dies which I could see being a fire hazard if she dropped it into her toy box or something and it overheated.
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By LTCetme:
Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000


I don't have any eneloops although I've heard you guys talking about them.

Can you charge them and leave them charged for long periods (6mo-year)?
Can they be substituted for any device that would normally hold the particular size?
Are they damaged by leaving them discharged for a prolonged period?
Any catches other than cost?

Also I appreciate the replies. I honestly had not thought about the safety aspects of using the lithium. She likes to turn the light on and then forget about it until it dies which I could see being a fire hazard if she dropped it into her toy box or something and it overheated.


I don't know about leaving them discharged but they are famous for holding a charge over years. They have very low self discharge rates. Use them in place of any AA battery.
Link Posted: 3/14/2015 9:23:57 AM EDT
Link Posted: 3/14/2015 9:25:54 AM EDT
Link Posted: 3/14/2015 9:28:53 AM EDT
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Originally Posted By The_Beer_Slayer:
for her just getting the cheapest nicad rechargeables you can find might be best. they are not that expensive compared to alkalines and if you get 20 charges out of them before she kills them you come out ahead.

would also be a good time to teach her about responsibility such as turning thigs off properly and taking care of it.
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I think this is the most prudent.
Link Posted: 3/14/2015 9:38:33 AM EDT
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Originally Posted By The_Beer_Slayer:
for her just getting the cheapest nicad rechargeables you can find might be best. they are not that expensive compared to alkalines and if you get 20 charges out of them before she kills them you come out ahead.

would also be a good time to teach her about responsibility such as turning thigs off properly and taking care of it
.
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Oh yes... We are on that part hard.
Link Posted: 3/14/2015 12:36:51 PM EDT
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Originally Posted By The_Beer_Slayer:
Cause 3: Over-discharged.
Applications without over-discharge preventing device can cause
batteries to over-discharge. For example, use low current draw LED light
until battery runs out, it cause over-discharge and later cannot charge
the battery correctly. Recharging battery 2-3 times solves this problem
but if the problem still persists, It is considered battery’ s life span has
ended and please stop using. Continuous over-discharging causes
damage to the batteries. We recommend to recharge the battery, once
luminous energy become low or battery energy become low during
using LED light

View Quote


I have been designing and manufacturing Ni-MH & Ni-Cd chemistry battery chargers for 25 yrs.
The following are generalized comments. Cells from different manufactures will have different parameters.
This is not really true for a single cell but it is true for multiple cells in series. With multiple cells and discharging to zero volts, one of the cells with go to zero first and other(s) will reverse charge that cell as the load current runs thru it. This will damage the zero volt cell.

There is no reason to discharge a Ni cell much below 1.0v. At this point something like 95% of stored energy has been used. Anything further is waste of time and risks damaging the cell if used in a series application.
Link Posted: 3/14/2015 3:08:46 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Ranchhand365:


I have been designing and manufacturing Ni-MH & Ni-Cd chemistry battery chargers for 25 yrs.
The following are generalized comments. Cells from different manufactures will have different parameters.
This is not really true for a single cell but it is true for multiple cells in series. With multiple cells and discharging to zero volts, one of the cells with go to zero first and other(s) will reverse charge that cell as the load current runs thru it. This will damage the zero volt cell.

There is no reason to discharge a Ni cell much below 1.0v. At this point something like 95% of stored energy has been used. Anything further is waste of time and risks damaging the cell if used in a series application.
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Originally Posted By Ranchhand365:
Originally Posted By The_Beer_Slayer:
Cause 3: Over-discharged.
Applications without over-discharge preventing device can cause
batteries to over-discharge. For example, use low current draw LED light
until battery runs out, it cause over-discharge and later cannot charge
the battery correctly. Recharging battery 2-3 times solves this problem
but if the problem still persists, It is considered battery’ s life span has
ended and please stop using. Continuous over-discharging causes
damage to the batteries. We recommend to recharge the battery, once
luminous energy become low or battery energy become low during
using LED light



I have been designing and manufacturing Ni-MH & Ni-Cd chemistry battery chargers for 25 yrs.
The following are generalized comments. Cells from different manufactures will have different parameters.
This is not really true for a single cell but it is true for multiple cells in series. With multiple cells and discharging to zero volts, one of the cells with go to zero first and other(s) will reverse charge that cell as the load current runs thru it. This will damage the zero volt cell.

There is no reason to discharge a Ni cell much below 1.0v. At this point something like 95% of stored energy has been used. Anything further is waste of time and risks damaging the cell if used in a series application.


OK so other than remove the battery and check it with a volt meter after each use how do you propose a person uses rechargeable battery that won't damage it?
Link Posted: 3/14/2015 4:27:39 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By LTCetme:


OK so other than remove the battery and check it with a volt meter after each use how do you propose a person uses rechargeable battery that won't damage it?
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Originally Posted By LTCetme:
Originally Posted By Ranchhand365:
Originally Posted By The_Beer_Slayer:
Cause 3: Over-discharged.
Applications without over-discharge preventing device can cause
batteries to over-discharge. For example, use low current draw LED light
until battery runs out, it cause over-discharge and later cannot charge
the battery correctly. Recharging battery 2-3 times solves this problem
but if the problem still persists, It is considered battery’ s life span has
ended and please stop using. Continuous over-discharging causes
damage to the batteries. We recommend to recharge the battery, once
luminous energy become low or battery energy become low during
using LED light



I have been designing and manufacturing Ni-MH & Ni-Cd chemistry battery chargers for 25 yrs.
The following are generalized comments. Cells from different manufactures will have different parameters.
This is not really true for a single cell but it is true for multiple cells in series. With multiple cells and discharging to zero volts, one of the cells with go to zero first and other(s) will reverse charge that cell as the load current runs thru it. This will damage the zero volt cell.

There is no reason to discharge a Ni cell much below 1.0v. At this point something like 95% of stored energy has been used. Anything further is waste of time and risks damaging the cell if used in a series application.


OK so other than remove the battery and check it with a volt meter after each use how do you propose a person uses rechargeable battery that won't damage it?



Steal her light from her every few days and charge it up! LOL!
Link Posted: 3/14/2015 5:23:27 PM EDT
Link Posted: 3/14/2015 7:26:39 PM EDT
[Last Edit: 3/14/2015 7:27:41 PM EDT by 300rum]
I have 4 of these 18650 lights. $7.99 a piece, bright as hell, 5 mode, if I lose one meh.



https://www.dealmetic.com/product.asp?ID=FL05518




Link Posted: 3/15/2015 11:43:15 PM EDT
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Originally Posted By The_Beer_Slayer:


this x1000
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Originally Posted By The_Beer_Slayer:
Originally Posted By batmanacw:
AA Eneloops

18650 are too dangerous for kids. Especially in a high power light. Eneloops won't explode when discharged too fast.


this x1000

Link Posted: 3/15/2015 11:50:43 PM EDT
[Last Edit: 3/15/2015 11:50:53 PM EDT by Macumazahn]
Most of my cheap 18650 lights get pretty hot.

I usually give my kids some AA or AAA lights that they can play with.

Go to lowes and buy a mega pack of their off brand AA or AAA batteries. Those last a LONG time. Plus, I find my rechargable batteries to be too expensive for the kids, as they have a tendency to lose the lights.
Link Posted: 3/28/2015 2:21:34 AM EDT
[Last Edit: 3/28/2015 1:21:11 PM EDT by blueheeler66]
$20 well spent; very bright, with battery and charger; 1200 lumens
http://www.amazon.com/gp/product/B00I946KU8/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

or http://www.amazon.com/Fenix-XP-E2-Pocket-Light-Keychain/dp/B00I8D4AMA/ref=sr_1_7?ie=UTF8&qid=1427523779&sr=8-7&keywords=fenix+e12

eta:
http://www.midwestblade.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=140&virtuemart_category_id=154
Got a email this morning:
30% off ALL Fenix Flashlights. Use Coupon Code: 30offFenix
Includes all Fenix Flashlights, Batteries, and Chargers!
Offers good while supplies last.
Offers expires at 11:59pm (CDT) Friday, April 3, 2015.

I think this is a good deal (above).
I have several, the latest a PD35 at 960 lumens; a little larger than I care to carry in a pocket, but it does fit.
I also bought a NiteCore I4 charger that charges a large range of battery types including AA & 18650, CR123A, etc.
Link Posted: 3/28/2015 1:34:02 PM EDT
Link Posted: 3/28/2015 2:40:31 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By blueheeler66:
$20 well spent; very bright, with battery and charger; 1200 lumens
http://www.amazon.com/gp/product/B00I946KU8/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

or http://www.amazon.com/Fenix-XP-E2-Pocket-Light-Keychain/dp/B00I8D4AMA/ref=sr_1_7?ie=UTF8&qid=1427523779&sr=8-7&keywords=fenix+e12

eta:
http://www.midwestblade.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=140&virtuemart_category_id=154
Got a email this morning:
30% off ALL Fenix Flashlights. Use Coupon Code: 30offFenix
Includes all Fenix Flashlights, Batteries, and Chargers!
Offers good while supplies last.
Offers expires at 11:59pm (CDT) Friday, April 3, 2015.

I think this is a good deal (above).
I have several, the latest a PD35 at 960 lumens; a little larger than I care to carry in a pocket, but it does fit.
I also bought a NiteCore I4 charger that charges a large range of battery types including AA & 18650, CR123A, etc.
View Quote


I almost bought the PD40 off midwestblade but they don't sell the battery.
Link Posted: 3/28/2015 3:35:15 PM EDT
Batman
try http://www.orbtronic.com/26650-batteries-chargers-li-ion-IMR-LiFePO4 or Amazon.com
I ordered some 18650s from Amazon and they came from Orbtronic.com
Link Posted: 4/29/2015 11:25:41 PM EDT
I like these: http://www.amazon.com/gp/product/B00BIYKHVO/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

They work great and if I destroy or lose one its not a big deal at that price..
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