is there a 3V bat the same size as 1.5V AAA?

carnal

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Extra good if it could be lithium.
I want to turn a mag solitaire in to 3V to run a Lambda
MJLED up front.
Thanks
 

IsaacHayes

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why not use the new litium recharable 3.7v AAA. I think they said there was an AAA now. Check a thread talking about the AA. Should be recent.
 

Doug S

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You are thinking of a 3V LiMnO2 cell? I don't think it exists. I wish it did. There are Li-ion AAA cells which are 3.6V nominal, 4.2V fully charged. I have seen 3.68V lithium thionyl chloride AAA cells but they are only capable of a mA or so. I remember in the late 80's they were $14 each in small quantities. I still have one around somewhere that I got as a manufacturer's sample.
 

andrewwynn

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get AAA LiON like i use in nano, and make an LDO driver.. you can run it 450mA.. limit of the battery.

-awr
 

carnal

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charger for 3.6V AAA sized li-ionbat?

Ok found the battery, now what about a charger?

Would a qualcomm 3.6v lith ion cell phone charger work?
Its for piggy back batteries that snap onto a 2760 phone.

The charger has 4 connect pins for what?
2 for charging, 2 for monitoring?

Thanks in advance
Brian
 

andrewwynn

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Re: charger for 3.6V AAA sized li-ionbat?

usually the extra pins on a battery pack are for charging.. the charger goes through a thermistor or other electronic circuitry that can disconnect the battery from charging.. so.. a problem is.. is the charger a smart charger that knows how to cut down the charge rate when the battery gets over 4.1 V or not, and does it know how to deal with the charge curve of the battery and shut off for other reasons than just max V... for example.. a worn battery may only get to 4.14V.. so if it is trying to charge to 4.2 and it never gets there.. it'll pump in current forever and wreck the battery.

-awr
 
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