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Old 11-13-2007, 03:28 PM   #1
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Default Safest Li Packs

The safest lithium based packs on the market are a123 cells. They don't catch fire if something goes terribly wrong, they are durable, and they have a special cap that will relieve pressure so they don't blow up if you do stupid things with these cells. Not to mention you can purchase them for dirt cheap. I have seen the cells sale for less then $10 a piece. It takes two cells to make a 6.6 volt 2300 mah pack.
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Old 11-14-2007, 04:24 AM   #2
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Originally Posted by party_wagon View Post
The safest lithium based packs on the market are a123 cells. They don't catch fire if something goes terribly wrong, they are durable, and they have a special cap that will relieve pressure so they don't blow up if you do stupid things with these cells. Not to mention you can purchase them for dirt cheap. I have seen the cells sale for less then $10 a piece. It takes two cells to make a 6.6 volt 2300 mah pack.
Mate i wouldn't go with the $10 cells they would be unreliable and more likely to catch fire, save up and spend a bit of money on good cells, i personally wouldn't go with the $10 cells because of the safety issues with Lithium packs.

I have hear Team Orion made a decent Li-Po pack
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Old 11-14-2007, 07:11 AM   #3
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Originally Posted by party_wagon View Post
The safest lithium based packs on the market are a123 cells. They don't catch fire if something goes terribly wrong, they are durable, and they have a special cap that will relieve pressure so they don't blow up if you do stupid things with these cells. Not to mention you can purchase them for dirt cheap. I have seen the cells sale for less then $10 a piece. It takes two cells to make a 6.6 volt 2300 mah pack.
Thats great for back yard bashing but for racing the A123 voltage is all wrong (too low).
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Old 11-14-2007, 07:15 AM   #4
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Go Orion, nuff said.
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Old 11-14-2007, 07:29 AM   #5
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Oops not sure what happened there.
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Old 11-14-2007, 07:31 AM   #6
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These are looking very interesting and i would love to have my batts charged in 15mins.
Voltage shouldnt be a issue since this would be like running a little highervoltage than 5cell and is a lot safer.

http://www.a123racing.com/

Still early days and bound to be improvements in this technology as well.
Have a look at this bike running on 990 of these cells.
http://www.a123racing.com/html/killacycle.html
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Old 11-14-2007, 07:31 AM   #7
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Got a triple post some how ?
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Old 11-14-2007, 08:05 AM   #8
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ROFL, you don't trust them because you can purchase them for a cheap price. Perhaps they actually mass produce these cells. The company is currenty in contract w/ chevy, saturn, dewalt. Do I really need to go on? These cells are very safe and a have a lifespan of around 1500 cycles. You can purchase them for a lot off their website. Or you can purchase dewalt 36 volt battery packs which contain 10 cells for under $100 shipped off of ebay. Not to mention you can lay them out over a chasis how every you wan to. You can wire them up side by side or make them in to a saddle pack. I have seen a lot of 4wd mod guys running these cells in a 2s 2p configuration because they are a durable saddle pack. They normally get 15 minutes of run time w/ a gtb 4.5 or 6.5. Their low voltage cut off is around 2 volts per cell so you will actually know when you need to pull them off the track. Their discharge is more linear then lipos too. They have 3.6 volts for like 15 seconds, 3.3 volts for like 6 minutes and then they hit 4 volts in like 15 seconds.
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Old 11-14-2007, 10:13 AM   #9
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Quote:
Originally Posted by Evilstealth View Post
Mate i wouldn't go with the $10 cells they would be unreliable and more likely to catch fire, save up and spend a bit of money on good cells, i personally wouldn't go with the $10 cells because of the safety issues with Lithium packs.

I have hear Team Orion made a decent Li-Po pack
Generally, that's good advice, but in this case, party_wagon is right. You can get authentic A123 cells for that price by purchasing a Dewalt 36V battery on ebay for around $90-$100, then dissassembling it to find 10 cells. Video tutorial here.


The air plane guys love A123 cells. Rapid 10 amp charging means they can get back up in the air quickly. Lot's of discharge amps too. Recently, A123 released smaller 1100 mAh versions.

Last edited by James35; 11-14-2007 at 10:31 AM.
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Old 11-14-2007, 02:00 PM   #10
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These cells are rated for a 30c constant discharge which is plenty for 1/10th scale aplications. Not to mention they actually charge at 10 amps the entire charge so 15 minute charge times are a reality. You can invest in a dewalt pack w/ a friend & build two packs for each of you. Then you can run a 6 minute heat w/ out any hassles and have the other battery 9 minutes from being fully charged the moment you come off of the track. Between switching batteries and ect. there is virtually no down time at all. These cells are perfect for pan cars as well. I really think on road needs to do away with multiple classes all togather and just run a sportsman & pro mod class. You could easily set these cars up for 10 minute mains w/ a 2p a123 pack too. The reason so many people ran differant classes was because of maintanance and money. Well, now li//bl is probly the cheapest class to run out of any of them.
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Old 11-14-2007, 07:49 PM   #11
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Today I built a 3p 2s pack for my xxx-t which gets me through a 20 minute main w/out problems.
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