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Noob to Lipo puffed the 1st pack I charged

Old 02-15-2009, 06:55 PM
  #1  
nytestalker
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Default Noob to Lipo puffed the 1st pack I charged

Can someone tell me what I did wrong before I switch to slimmers!
I have a thunder power 3s 11.1V 910 Mah Lipo. I used a lipo balancing charger.
This is a brand new lipo, never been hooked up. Brand new charger 1st batt ever charged. I started charging at 7:50 pm at 11:15 I was tired and didn't want to leave it charging while I slept. I unplugged it and and used my multimeter to read the voltage from the power plug. It read 9.4 V. I left it unpluged and went to sleep.
In the morning I rechecked the voltage and it said 10.1V, I thought that was strange for the volts to go up while it rested. But hey I'm a noob. So, I plugged it back in the chrager to let it finnish topping off. About 20 min later I felt the pack to make sure it wasn't warm. When I touched it it was cool, but it had puffed. I immediatly unhooked it, and checked the voltage. It read 48mV. What the heck did I do wrong? Thanks for any help.
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Old 02-15-2009, 07:03 PM
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smokejohnson
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The charge time was way too long, it should only take around an hour. What type of charger do you have and what did you have it set at?
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Old 02-15-2009, 07:25 PM
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nytestalker
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Originally Posted by smokejohnson View Post
The charge time was way too long, it should only take around an hour. What type of charger do you have and what did you have it set at?
http://www.maxfordusa.com/li-pobatte...cecharger.aspx

This is the charger that I got. It has 2 plugs 11.1v and 7.4v I had it plugged in the 11.1v side.

No setting so I thought it was automatic.
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Old 02-15-2009, 07:40 PM
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firemanbill
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Lipo balance taps do not follow any industry standard. The positive and negative leads are in different arrangements, as is the types of connectors even, from various manufacturers. It is possible that this charger was not compatible with a TP battery

Does the charger have a manual with it? if so it should tell you what batteries will work with it.

If the TP is compatible it could be that you just have a bad battery. I can't see that charger overcharging it as it is only rated at 0.8 amps which is under the 9.0 that you battery would use. Like Smoke said, it shouldn't take more than an hour, maybe a bit longer since it is charging at under 1c, to charge that battery.
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Old 02-15-2009, 07:44 PM
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I didnt see anything that said the charger has an auto shut off feature.could be you just cooked the battery
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Old 02-15-2009, 08:07 PM
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I think Bill is right...the balance taps on your Thunder Power are not compatible with your charger. Your charger looks like the same one Jeff at Heads Up sells and according to his info TP are a no go. I can't be for sure that they are the same charger though.
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Old 02-15-2009, 09:58 PM
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That has the Align/Rhino/Hextronic/etc. balance tap port. It is not Thunderpower compatible. You should not have even been able to get the TP in there. If you did you 'crammed' it. I suspect the tap configuration was wrong or the charger malfunctioned.

Frankly, as a $10 charger I wouldn't consider it reliable. I have one just like came with a POS plane. I put a brand new BALANCE battery on it as a test and it came off UNBALANCED.
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Old 02-15-2009, 10:16 PM
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The charger you were using is Not very good at all, invest in a Good Quality charger, your TP lipo needs an adapter, for other than a TP Charger, You just made a common Newby mistake, to save you a ton of money, buy the Rhino lipos, they work great, and are 1/3 the price of a TP lipo

http://www.hobbycity.com/hobbycity/s...0C_Lipoly_Pack

and a cellpro charger, dont go cheap on the charger or you will damage your lipos, you need a 1000mah + lipo to use a cell pro charger i belive. this is the best, safest charger on the market.
http://www.fmadirect.com/Detail.htm?...218&section=45
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Old 02-16-2009, 05:35 AM
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Originally Posted by CHELLIE View Post
...

and a cellpro charger, dont go cheap on the charger or you will damage your lipos, you need a 1000mah + lipo to use a cell pro charger i belive. this is the best, safest charger on the market.
http://www.fmadirect.com/Detail.htm?...218&section=45
Cellpro charger also works with batteries less than 1000mah. It has a "1C" setting which somehow "knows" the mah-size of the battery. Works fine with my 500mah and 750mah lipos.
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Old 02-16-2009, 07:02 AM
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Originally Posted by gyrocptr View Post
Cellpro charger also works with batteries less than 1000mah. It has a "1C" setting which somehow "knows" the mah-size of the battery. Works fine with my 500mah and 750mah lipos.
Ok, Thats good to know, The 1C would normally mean 1 AMP or 1000mah, Take care, Chellie
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Old 02-16-2009, 07:42 AM
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Larry3215
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Originally Posted by CHELLIE View Post
Ok, Thats good to know, The 1C would normally mean 1 AMP or 1000mah, Take care, Chellie
1C would only mean 1 amp for a 1000 mahr battery. It changes with the capacity of the pack.

1C for a 1500 ma pack is 1.5 amps

1C for a 2200 mahr pack is 2.2 amps

1C for a 500 mahr pack is .5 amps

1C for a 350 mahr pack is .35 amps.

1C for a 10000 mahr pack is 10 amps

etc
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Old 02-16-2009, 07:48 AM
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Originally Posted by Larry3215 View Post
1C would only mean 1 amp for a 1000 mahr battery. It changes with the capacity of the pack.

1C for a 1500 ma pack is 1.5 amps

1C for a 2200 mahr pack is 2.2 amps

1C for a 500 mahr pack is .5 amps

1C for a 350 mahr pack is .35 amps.

1C for a 10000 mahr pack is 10 amps

etc
Thanks Larry Thats good to know
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Old 02-16-2009, 11:15 PM
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I just glanced at the specs on the cellpro, and it looks like it can charge as slowly as .25 amps. so, 1C on as small as a 250 mAh battery. It seams pretty safe for small batteries to me, as there aren't many produced smaller than 250 mAh. I have a 310 Rhino, and that thing is tiny--the size of the end of my thumb!
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Old 02-17-2009, 07:10 PM
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Gary Hoorn
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I strongly suspect your charger has ruined that TP lipo as it is not compatible with TP balancing taps. If that cheap charger had any "stones" you could have had a fire! Consider it a lesson learned and get yourself a decent charger. Make yourself a discharger with an automobile tail light bulb. Plug that lipo in and leave it to discharge for 24 hours in a safe place then discard it. Some attempting to save a buck or two will say try and save it but consider your vehicle and your house. If you intend to fly electric planes you need a decent charger and at least a Watts Up or similar meter to measure voltage and current.
Gary
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Old 02-17-2009, 10:33 PM
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I haven't got any batteries but am choosing between NiMH or LiPo what would you suggest.
Jack
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Old 02-17-2009, 10:43 PM
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Originally Posted by usb.to.go View Post
I haven't got any batteries but am choosing between NiMH or LiPo what would you suggest.
Jack
Lipo's.
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Old 02-17-2009, 10:52 PM
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Simple and succinct fair enough.
Thanks Jack
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Old 02-17-2009, 11:01 PM
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No problem Jack.

Lipos are the way to go now. They are lighter, pack more punch in the same size pack, more volts, more Mah, less weight than Nimhs.

As long as you treat them right and don't abuse them they will serve you well.
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Old 02-17-2009, 11:09 PM
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Cool thanks
Jack
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Old 02-17-2009, 11:13 PM
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No sweat, good luck to you!
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Old 02-20-2009, 05:31 AM
  #21  
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Originally Posted by nytestalker View Post
I unplugged it and and used my multimeter to read the voltage from the power plug. It read 9.4 V. I left it unpluged and went to sleep.
In the morning I rechecked the voltage and it said 10.1V, I thought that was strange for the volts to go up while it rested. .
You should have read a higher voltage than 11,7V before you went to sleep. When in addition the voltage did rise during night it proves the "charger" in fact did discharge your battery.
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Old 02-20-2009, 05:56 AM
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d

Last edited by ministeve2003; 03-27-2009 at 04:35 AM.
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Old 02-23-2009, 06:17 AM
  #23  
CHEECH
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Will a car battery charge my 3s 11.1 1650 mah Lipo in one shot? Or will I have to stop charging, half way through to re-charge the 12V source. Charge rate of balance charger .8 amps.

Cheech
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Old 02-23-2009, 08:00 AM
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Last edited by ministeve2003; 03-27-2009 at 04:35 AM.
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Old 02-23-2009, 08:17 AM
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Thanks. I plan to charge the Lipos that I have first. Then amp up the car battery. And so on.

Cheech
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