R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 06-29-2009, 02:59 PM   #16
Tech Lord
 
Frank L's Avatar
 
Join Date: Dec 2008
Location: NorCal
Posts: 12,500
Trader Rating: 148 (100%+)
Default

Quote:
Originally Posted by bmxRRT View Post
Losi 14.8v 2200mah lipo....I started charging it at 2.2amps like normal and it wouldn't accept past 0.25amps. I restarted the charge and 20min later it was at 14v and 2.2amps, so I thought sweet- maybe I overdischarged it or something.

I fall asleep in my bed which is next to my work table, and I hear POP, POP, I jump up and think to myself OH SHITT BITCH. I unplug my charger from the wall and think to myself for a second. I grab the box by the handle and run downstairs(3 flights) to my outside cement patio, meanwhile as I'm running down the stairs its popping and smoking.

I lay the box upside down on the cement, go back upstairs, sleep for a few hours, I come back down to check on it- and my box is black and so is the cement.

Thank god for the metal box!

Oh and the wires are melted all the way back to the motor, can't salvage it.
That is why you charge these batteries in fire-safe bags or other fire-safe environments. I use the same losi battery and I never leave it plugged in the box except on race day or if I am using it. I never store it plugged it. I always remove the battery from the starter box and charge it separately. These batteries are dangerous and need special attention. You not only lost a 90 buck battery you also junked a 90 buck starter box. That sucks. These batteries are sensitive and need to be treated accordingly. Its not like the old nicad days when you could charge and run until the battery was so hot you could not touch it. Not the case with lipos. It you run them in your vehicle there better be a voltage safety installed. I have seen videos and pictures of your 2k race machine melted to the ground because of a lipo incident. Bottom line is lipos are dangerous.
__________________
- X-Ray/ RC America Team Driver - MKS -
- XB8 - XB8T - XB8 E - OS Spec III - B2102 - 4PXR -
~ SSC ~ Godfather ~ Ironman ~ ButterySmooth ~
Frank L is offline   Reply With Quote
Old 06-29-2009, 03:00 PM   #17
Tech Master
 
8&stuff's Avatar
 
Join Date: Oct 2008
Location: In.
Posts: 1,401
Trader Rating: 55 (100%+)
Default

the first time i bumped my lipo wires together i thought o well...then it swelled. the second one i jumped in the air while watching blue sparks fizzlenow every lipo i look at i know whether or not the owners had the blue spark sweats. now years down the road and careful soldiering it aint happening again........
__________________
Mark Buecker
8&stuff is offline   Reply With Quote
Old 06-29-2009, 03:28 PM   #18
Tech Champion
 
Jason Pelletier's Avatar
 
Join Date: Jul 2007
Location: New York
Posts: 8,820
Trader Rating: 33 (100%+)
Default

Lipo's are only dangerous when you don't know what your doing. sounds and loks like you overcharged it. lipos charge cc/cv. when the lipo gets full the amps go down. if u put a fully charged lipo on a lipo charger the amps will start falling. Usually the charger will shut off but looks lie you kept trying to charge it.

I haven't had issue with a lipo and i have had about ten of them, I also use them all the time at the track in my 1/10th buggies.

Lipo's are the best thing to happen to rc and cell phones.
__________________
Island Raceway & Hobby
Jason Pelletier is offline   Reply With Quote
Old 06-29-2009, 03:31 PM   #19
Tech Fanatic
 
bradfox2's Avatar
 
Join Date: Oct 2008
Location: SRS,Az
Posts: 752
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by Frank L View Post
That is why you charge these batteries in fire-safe bags or other fire-safe environments. I use the same losi battery and I never leave it plugged in the box except on race day or if I am using it. I never store it plugged it. I always remove the battery from the starter box and charge it separately. These batteries are dangerous and need special attention. You not only lost a 90 buck battery you also junked a 90 buck starter box. That sucks. These batteries are sensitive and need to be treated accordingly. Its not like the old nicad days when you could charge and run until the battery was so hot you could not touch it. Not the case with lipos. It you run them in your vehicle there better be a voltage safety installed. I have seen videos and pictures of your 2k race machine melted to the ground because of a lipo incident. Bottom line is lipos are dangerous.


Car batteries are dangerous when shorted or overcharged too.

Lipo danger is way way overplayed.
__________________
8ight-E 2.0, Tekin RX8 1350-T, 13/46, 6s zippy/neu power, fut. 4pk
bradfox2 is offline   Reply With Quote
Old 06-29-2009, 03:57 PM   #20
Tech Lord
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,482
Trader Rating: 8 (100%+)
Send a message via MSN to Integra
Default

Quote:
Originally Posted by bradfox2 View Post
Car batteries are dangerous when shorted or overcharged too.

Lipo danger is way way overplayed.


__________________
TNS Driver - Radio Post - Blue Groove Apparel - Team Panther - Hitec - Losi - W.E.D. Paint - Clockwork Fuel - Competition Heat - SUMO Racing - Tekin - Team Terribles - M2C Racing - Matrix Concepts - Kal Gard - BuKu Power - DE Racing -
Integra is offline   Reply With Quote
Old 06-29-2009, 04:16 PM   #21
Tech Fanatic
 
Join Date: Apr 2009
Location: SL,UT
Posts: 938
Trader Rating: 49 (100%+)
Default

Quote:
Originally Posted by bradfox2 View Post
Car batteries are dangerous when shorted or overcharged too.

Lipo danger is way way overplayed.
I saw a car battery explode in a ford f-250. It jumped 3 feet in the air (braking the tie-downs, don't know how high it would have gone without them) and exploded and threw acid everywhere. that's definitely more dangerous than a little fire.
__________________
-Mike B. - TLR22 - Tekin - K.O propo
aradaiel is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Airbrushing and Art Hologram Australian Racing 5415 07-02-2017 06:56 PM
Spektrum allrc Radio and Electronics 2545 07-17-2012 08:25 AM
Losi Constant Velocity Drive (LCD) vs MIP CVD John Stranahan Electric On-Road 263 01-24-2010 11:51 AM
So, with 2008 now almost over, what would you like to see in r/c for 2009? tc3team Electric On-Road 80 12-24-2008 09:30 PM
Who wants to run 1/12 scale Mamba Brushless spec class? GordonFreeman MARCCA Discussion 61 09-03-2005 02:48 PM
Capital City Carpet Challenge - April 6th, 2002 futureal Wisconsin & Illinois Racing 99 04-10-2002 08:37 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 07:08 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net