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CR123A

Old 01-17-2012, 06:01 AM
  #1  
telejojo
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Default CR123A

I saw these batteries on ebay and they are listed as li-on at 3.7v are these the same as A123? And can they be used without a regulator?
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Old 01-17-2012, 06:09 AM
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Default RE: CR123A

Dont think so. A123 are a superior type of LiFe batteries. Lipos have a nominal voltage of 3.7v per cell, Life are slightly lower. So if it has a 3.7v/cell it is a lipo not LiFe.

Unsure what you want to use them for and therefore if a regulator is required.

A two cell 7.4v lipo can be used with a regulator to power a reciever if that is what you are asking?
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Old 01-17-2012, 07:37 AM
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Default RE: CR123A

If you do use 2s Lipo as a receiver pack, make sure your regulator has a very low dropout. Near the LVC point (~3.2v/cell), you'd need a regulator with a 0.4v dropout to still provide the required 6v...
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Old 01-17-2012, 08:36 AM
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Default RE: CR123A

hmmm, I have a little black box that i connect between the lipo and receiver. It can either drop the voltage to 6v or 4.8v I think.

I do keep an eye out for the voltage of the pack. Does the need of a low voltage cutout derive from the need to prevent over discharging? If this is the case I just monitor the pack periodically as I don't drain the battery much anyway. Thanks
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Old 01-17-2012, 01:28 PM
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Default RE: CR123A

I use A123 with no regulator and saw these on ebay but the voltage looked high as A123 is about 3.3 but I have never used a reg. and and had no problems.http://www.ebay.com/itm/5X-New-Ultra...item3f12764007
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Old 01-17-2012, 01:49 PM
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Default RE: CR123A

CR123A cells are primary batteries, they may not be recharged. These are for electronic cameras and other consumer devices.
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Old 01-17-2012, 02:10 PM
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Default RE: CR123A


ORIGINAL: pilotpete2

CR123A cells are primary batteries, they may not be recharged. These are for electronic cameras and other consumer devices.
Pete
+1
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Old 01-17-2012, 02:55 PM
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Default RE: CR123A

The original post is referring to A123 which I believe are  a type of LiFe rechargeable battery.
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Old 01-17-2012, 05:02 PM
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Default RE: CR123A

No, the subject of the thread is in regard to CR123A cells
Very popular Lithium primary cell for consumer electronics applications. RCR123A cells are rechargeable.
telejojo, please post the link, then we'll be sure of what you're looking at
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Old 01-17-2012, 11:31 PM
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Default RE: CR123A

My mistake
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Old 01-18-2012, 04:13 AM
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Default RE: CR123A

There's a link on my last post it say's li-ion rechargable
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Old 01-18-2012, 07:51 AM
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Default RE: CR123A

Yes, one of the photos shows the full charge voltage as 4.2V and 2.5V for fully discharged, so yes, you would need a regulator with servos that aren't rated for Lipo.
Li-on is not the same as LiFePo4 or the better A123's. AFAIK, they don't do all that well holding voltage under heavy load.
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Old 01-18-2012, 08:47 AM
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Default RE: CR123A

ORIGINAL: telejojo

There's a link on my last post it say's li-ion rechargable
Li-ion's are 3.6 per cell = 7.2 for a 2 cell pack
Lipo's are 3.7 per cell = 7.4 for a 2 cell pack

Two different type of batteries.
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Old 01-18-2012, 08:53 AM
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Default RE: CR123A


ORIGINAL: telejojo

I saw these batteries on ebay and they are listed as li-on at 3.7v are these the same as A123? And can they be used without a regulator?
To answer the first question - NO
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