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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 09-04-2012, 05:46 AM   #1
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Default Build your own two cell A123 receiver battery pack

More and more of my club members are going to either the LiFe or A123 battery packs for the receivers on their gas/glow engines. Or as backup receiver power for the larger electric models.

The attached PDF file shows how a battery pack was built up using two 2300 Mah A123 cells, and a few other parts.

Voltmanbatteries is a very good USA A123 cell supplier. Their cells have spot welded solder tabs that are easily soldered with a 40 watt soldering iron.

Bad news, Voltmanbatteries no longer sells A123 cells.
Good news, Voltmanbatteries now has them in their Ebay site. (02-27-15)
http://www.ebay.com/itm/2-NEW-BATTER...item5ae9a53ed9

I just purchased some from this place, they worked well. They do not have solder tabs however. You absolutely must purchase a Weller 100 Watt temperature regulated soldering iron to solder to these units.

Again, buya123batteries.com has closed down their web page, for several weeks now.
http://www.buya123batteries.com/ANR2...300475-306.htm


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File Type: pdf A123 Battery Pack Article.pdf (1.90 MB, 420 views)

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Old 09-04-2012, 06:15 AM   #2
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Great, Thanks.
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Old 10-17-2015, 01:36 AM   #3
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Default A123

Thanks - I was having a tough time finding the original A123s. I used to build motor packs before I switched to LiPo for those, but I like the A123s for the receiver packs.
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Old 10-17-2015, 01:53 AM   #4
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Originally Posted by wjbender View Post
Thanks - I was having a tough time finding the original A123s. I used to build motor packs before I switched to LiPo for those, but I like the A123s for the receiver packs.
For those that didn't see the link from RCGroups, here is the source for the latest type "B" 2500 Mah A123's. They are an authorized A123 distributor, located in Michigan, USA.

http://www.a123batteries.com/product-p/anr26650m1-b.htm

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Old 10-17-2015, 06:16 AM   #5
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Originally Posted by wjbender View Post
Thanks - I was having a tough time finding the original A123s. I used to build motor packs before I switched to LiPo for those, but I like the A123s for the receiver packs.
I'm still using A123's for motor packs. They are heavier, lower voltage, larger physical size, but for me, they do have advantages.

For one, zero fire hazard. For two, the factory authorized A123's are all nearly identical in performance within a few percent. Three, no worries about storage mode. And a few other issues.

But, for the same horsepower hours (Watt Hours), A123's are around 35% more weight. So, for an average 8 pound, 1200 Watt model, those A123's will add around 5% to 10% more overall weight.

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