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Old 03-03-2015, 08:20 AM   #1
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Default Lipo bag

Hey guys,

I've been using these crappy folding lipo bags (they come flat, then you have to fold them out into the rectangular box) and am getting increasingly frustrated with them as they don't hold their shape when you are putting your lipos in and velcroing it up.



You can see from the picture that it has fold lines and that it collapses to flat for storage.

Can anyone recommend a high quality lipo box/bag that actually holds it shape?

Thanks

Luke
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Old 03-03-2015, 08:33 AM   #2
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I'm happy with my Hudy bag. It's a similar size/shape to those, but better quality and doesn't come all squashed down.

http://www.redrc.net/2014/12/hudy-lipo-safety-bag/

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Old 03-03-2015, 09:17 AM   #3
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Default Lipo bags

I just use the flat bags with the velcro at the top. I don't want square boxes.
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Old 03-03-2015, 09:32 AM   #4
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KISS: keep it simple stupid. Those pricey box bags offer no benefit over a regular flat lipo bag.
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Old 03-04-2015, 01:19 AM   #5
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I dont even use one...never had a problem yet
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Old 03-04-2015, 01:26 AM   #6
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Quote:
Originally Posted by hairless_ape View Post
KISS: keep it simple stupid. Those pricey box bags offer no benefit over a regular flat lipo bag.
They take up less space on the pit table.
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Old 03-04-2015, 02:24 AM   #7
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Quote:
Originally Posted by disaster999 View Post
I dont even use one...never had a problem yet
That is what all stupid drivers say when they never had any issues with LiPo batteries. It is not all about that but that one time it can happen. If you want to have a huge flame combust into your face and burn down all your equipment arround the battery be my guest, but be wise and stay away from others who want to be safe.
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Old 03-04-2015, 02:48 AM   #8
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I use a money tin with holes cut, won't melt or catch fire and acts as a lipo safe when not charging.





Quote:
Originally Posted by Roelof View Post
That is what all stupid drivers say when they never had any issues with LiPo batteries. It is not all about that but that one time it can happen. If you want to have a huge flame combust into your face and burn down all your equipment arround the battery be my guest, but be wise and stay away from others who want to be safe.
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Old 03-04-2015, 04:15 AM   #9
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Didn't know folding bags are an option only knew of the flat bags.

Use a money tin, never thought of putting feed holes in it! Great idea!!!!!
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Old 03-04-2015, 04:59 AM   #10
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I have been doing this since well before LiPo's were introduced. In the beginning, LiPo's were pretty scary. It was recommended you charge them on concrete, many feet away from anything, and you never left it. Fire bags were a necessity. LiPo fires were common due to poor charging habits and soft cell packs that damaged easily. Things are different now.

If your discharge rate is low, say like from a high turn non boosted motor, and you only charge at 2-3c, then while still safe to have a bag, the battery will in all likelyhood nerve have a problem if its not damaged. But if your charging at 4c+ and have a super high amp draw like 4x4SCT, then your packs are getting USD to their extreme limits and have a good chance of flaming out.

Over charging, low voltage, swelling, and damaged/cracked cases also lead to fires. Dont charge your cells above the rated capacity 1s=4.2v max. 2s=8.4 max. Dont let your batts hit low volts of 3v per cell. And especially dont let them sit that low. Also dont let them sit fully charged. A nominal voltage of 3.7 - 3.8 volts per cell is recommended. If packs show signs of permanent swelling, get rid of them, if the cases are cracked, get rid of them.

Its unfortunately the nature of the beast. LiPo bags are needed because of the extreamly rare case of good batts going poof, or most likely because some jackass isn't properly caressing for theirs. In addition to meet building g codes in most places, the local fire department will require the use of a LiPo bag.

I do like Skiddens idea for storage. I should be more proactive and do something similar. Mine stay on the chassis, or in my tool box. Not too safe.

Another good idea, is if you know you are not go I to use your batteries for 5-6 months or longer, sell them off and get new ones when you get back to racing. It gives peace of mind about storage and you get nice new fresh batteries for the season. LiPo's are a lot cheaper than the old high performance NiMh we used to use, so why not.
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Old 03-04-2015, 08:33 AM   #11
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Quote:
Originally Posted by daleburr View Post
I'm happy with my Hudy bag. It's a similar size/shape to those, but better quality and doesn't come all squashed down.

http://www.redrc.net/2014/12/hudy-lipo-safety-bag/

Thanks. That's where I was leaning already, but wanted to get some feedback from people actually using them first.

And thanks everyone else for the info.

Cheers.

Luke
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