Ultrafire Rechargeable Lithium 3.6v AAA Battery

zipplet · Dec 11, 2006

Hi,

I've been reading a lot of threads on this forum for some time, and know about some of the dangers regarding Li-ion cells. But I've decided to bite the bullet and give them a try, since most people have no problem with them.

Does anyone here have any experience with the Ultrafire 3.6v AAA cells/charger? I'd like to get one to go with a 1W ultrafire AAA I've just ordered, but I can't find any more information about it except for the auction.

Auction here: http://cgi.ebay.co.uk/Ultrafire-Cha...8075189QQihZ011QQcategoryZ50603QQcmdZViewItem

Thanks

martonic · Dec 11, 2006

No experience with these - yet - but they are available at fifthunit (dot) com.

Lobo · Dec 12, 2006

Doh, missed this thread.

Didn't know that there were rechargable lithium AAAs either (just posted a thread about AAs).
Cant find them at fifthunit, do they have another name?

AndyTiedye · Dec 12, 2006

3.6v lithium-ion "AAA" batteries would also be known as 10440
because they are 10 mm diameter, 44mm long, and round.

zipplet · Dec 12, 2006

Well I want to try them because I've heard the ultrafire 1W AAA has some issues with ordinary alkaline/nimh cells - most notably that it won't start up once the voltage drops below a certain level even though there is plenty of power left in the cell. The AAA lithiums are said to work a lot better with it.

light_emitting_dude · Dec 12, 2006

Batteryspace has them also.

http://www.batteryspace.com/index.asp?PageAction=PRODSEARCH&txtSearch=10440&x=0&y=0

balazer · Dec 26, 2006

The UltraFire AAA cells are rated at 500 mAh. The Batteryspace cells are rated at 350 mAh.

Tronic · Dec 26, 2006

I have mine from qualitychinagoods.com.

They are rated at 500mAh but they have only around 300mAh.
You can see a comparison to AWs cells HERE.

KevlarSix · Mar 15, 2007

Would these run in a new Fenix LOD?

DM51 · Mar 16, 2007

These are UNPROTECTED cells. Exercise great care in charging (do not let them charge above 4.2v) and do not discharge below 3.0v. Many Li-Ion chargers are sold as safe but in fact are safe only with protected cells - they rely on the cell's protection circuit to prevent over-voltage charging.

Li-Ion 10440s (AAA size 3.7v) will not be 1000mAH. They will be ~330mAH at most.

LuxLuthor · Mar 16, 2007

Make sure you take pictures of your home's contents so you can get replacement coverage on your home/apt. insurance policy after the fire.

This person's purchase of such a lame Ebay promotion that doesn't say jack-sheet (!!!) about the Lithium chemistry being used, the charging voltage to be used, how reliable this "El Cheapo" charger is at limiting over-charging, what would happen if they were charged in a more typical 3.7V Lithium charger, and not even if they are protected or unprotected cells....but people just buy it...assuming it will all work out.

Look at the dangerous exploding fire Lithium battery videos I posted in this other thread dude.

coppertrail · Mar 16, 2007

I bought mine from dealextreme.com, along with some UltraFire 14500 cells and a WF-138 charger.

balazer · Mar 17, 2007

LuxLuthor said:
Make sure you take pictures of your home's contents so you can get replacement coverage on your home/apt. insurance policy after the fire.

This person's purchase of such a lame Ebay promotion that doesn't say jack-sheet (!!!) about the Lithium chemistry being used, the charging voltage to be used, how reliable this "El Cheapo" charger is at limiting over-charging, what would happen if they were charged in a more typical 3.7V Lithium charger, and not even if they are protected or unprotected cells....but people just buy it...assuming it will all work out.

Look at the dangerous exploding fire Lithium battery videos I posted in this other thread dude.

The Ultrafire charger in that eBay listing, and the other common chargers sold around here (DSD, Nano) all have voltage limiting circuits. Over-discharging will destroy a cell, but it won't cause a fire.

Caution is warranted, but you don't need to scare people. There hasn't been a single incident of a lithium ion battery starting a fire on CPF that I'm aware of. The lithium polymer batteries that the RC community uses are quite a bit more dangerous than lithium ion cells.

Ultrafire Rechargeable Lithium 3.6v AAA Battery

zipplet

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martonic

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Lobo

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AndyTiedye

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zipplet

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light_emitting_dude

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balazer

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Tronic

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KevlarSix

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DM51

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LuxLuthor

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coppertrail

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balazer

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