R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 08-08-2013, 07:32 AM   #1
Tech Master
 
Join Date: Aug 2010
Posts: 1,104
Trader Rating: 30 (97%+)
Default Lipo battery life

Hi, how long do lipo batteries last, from production date. If the batteries are brand new still in their packaging, but are nearly 5 years old, will they still be good or will they not be able to take on a charge or will their discharge rate not be the same. basically want to know, even if the lipo batteries are brand new, but are 5 years old, will they behave like new or do they eventually lose their abilities over time, thanks.
zaraz is offline   Reply With Quote
Old 08-08-2013, 07:44 AM   #2
Tech Elite
 
jlfx car audio's Avatar
 
Join Date: Nov 2007
Location: jackson,tn
Posts: 3,369
Trader Rating: 36 (100%+)
Default

What I have been told and have noticed in previous yrs is that a battery sitting around unused kills its performance . more so with punch than run time . ur has copper inside with chemicals . I would think it would deteriate . I know I been running 3 packs I got last Jan/Feb steady all summer and haven't noticed a fall off in there performance at all . but I had a forth pack that ran good up until I got these new packs but after it sitting 8months @3.85 its weak. Still has good run time but I do run .2-.3 slower on the carpet.
__________________
Justin & Matt Lyons
Awesomatix USA, EA motorsports, Sanwa, Protoform, Avid, Gravity Rc , TSR!
a800s sanwa m12s
jlfx car audio is offline   Reply With Quote
Old 08-08-2013, 08:56 AM   #3
Tech Master
 
Mr RCTech's Avatar
 
Join Date: Dec 2005
Posts: 1,291
Trader Rating: 2 (100%+)
Default

If you buy the good packs last longer performance wise than the cheaper packs.

I personally only run hard packs.

Packs like Sting (Trinity, SMC) are the best out there right now.
Also my second pick would be Venom.
Yes, believe it or not Venom.
Mr RCTech is offline   Reply With Quote
Old 08-12-2013, 07:58 PM   #4
Tech Elite
 
yodace's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: Caleb
Posts: 2,497
Trader Rating: 7 (100%+)
Default

I had a reedy 5000mah 35c last for nearly 7years. Just puffed Sunday..
yodace is offline   Reply With Quote
Old 08-12-2013, 08:02 PM   #5
Dan
Tech Elite
 
Dan's Avatar
 
Join Date: Oct 2001
Posts: 4,407
Trader Rating: 48 (100%+)
Default

They will die or a cell will go bad if you just leave them as is. I had a few brand new battery packs between a friend and I that we never soldered up. (It was 4S batteries and I ended up taking a break from 1/8th offroad to race 1/10th onroad). I just put on new connectors on them after 2-2.5 years and they all turned out dead. Tried to force a charge without balancer. And then they all puffed up.
Dan is offline   Reply With Quote
Old 08-12-2013, 08:59 PM   #6
Tech Initiate
 
Join Date: May 2013
Location: Los Angeles, Ca.
Posts: 31
Default

When u guys say puffed do you mean they literally swelled and puffed? Even the hard case?!

Is this not dangerous?

At what point does an old battery become a danger or safety probl
__________________
Xray T4, RC10T4.2, RC10B4.1 to 4.2 conversion, Axial SCX10 Jeep, 1/8 ERBE, OFNA DM1 spec E (going for 100mph).
BC2G is offline   Reply With Quote
Old 08-12-2013, 11:16 PM   #7
Tech Fanatic
 
Join Date: Jan 2012
Location: Carrollton, TX
Posts: 902
Trader Rating: 27 (100%+)
Default

If you talk to the guys at SMC, they say that their lipos puffing is pretty standard because of the smaller cases that they use. As such, swelling of their packs isn't covered under warranty.

Mine still charge and balance perfectly even after charging them at 12-15a without balance charging. They came to me slightly puffed, which, apparently, is within tolerance from SMC.
__________________
Xray | Airtronics | R1Wurks LiPo | Hobbywing
hyujmn is offline   Reply With Quote
Old 08-13-2013, 01:31 PM   #8
Tech Master
 
Mr RCTech's Avatar
 
Join Date: Dec 2005
Posts: 1,291
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by BC2G View Post
When u guys say puffed do you mean they literally swelled and puffed? Even the hard case?!

Is this not dangerous?

At what point does an old battery become a danger or safety probl
Very Dangerous
People lost there homes to lipo fires.

If you have a swelled or puffed lipo pack get rid of it now.

Even though a puffed pack still runs fine it can burst into flames at any given moment. Or small hit from another vehicle.
Why take chances with fire, and loosing more than a lipo pack.

Buy a quality lipo pack and it won't puff or swell.
Mr RCTech is offline   Reply With Quote
Old 08-13-2013, 05:05 PM   #9
Suspended
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Cali
Posts: 4,003
Trader Rating: 11 (92%+)
Default

Quote:
Originally Posted by Mr RCTech View Post
Very Dangerous
People lost there homes to lipo fires.

If you have a swelled or puffed lipo pack get rid of it now.

Even though a puffed pack still runs fine it can burst into flames at any given moment. Or small hit from another vehicle.
Why take chances with fire, and loosing more than a lipo pack.

Buy a quality lipo pack and it won't puff or swell.
theblitzkidd is offline   Reply With Quote
Old 08-13-2013, 06:30 PM   #10
Tech Elite
 
bvoltz's Avatar
 
Join Date: Jun 2005
Location: Bedtime with Teddi
Posts: 3,635
Trader Rating: 44 (100%+)
Default

Quote:
Originally Posted by Mr RCTech View Post
If you buy the good packs last longer performance wise than the cheaper packs.

I personally only run hard packs.

Packs like Sting (Trinity, SMC) are the best out there right now.
Also my second pick would be Venom.
Yes, believe it or not Venom.
What is your take on the new Trinity Revtech Formula "X"?
__________________
Wheeling an Xray T4 and T4 14 using a Ko Propo, powered by EA motors and Speed Passion Speedo, paid for by my wife.

Digi3Dworks - 3D printing for the medical Field.
bvoltz is offline   Reply With Quote
Old 08-13-2013, 07:56 PM   #11
Dan
Tech Elite
 
Dan's Avatar
 
Join Date: Oct 2001
Posts: 4,407
Trader Rating: 48 (100%+)
Default

Quote:
Originally Posted by BC2G View Post
When u guys say puffed do you mean they literally swelled and puffed? Even the hard case?!

Is this not dangerous?

At what point does an old battery become a danger or safety probl
Yes, puffed to the point where it cracked open the hard case. Very dangerous.

If you have a quality balance charger, it will not charge a dead lipo since it will tell you there is a low voltage issue or cell is overly discharged. I always balance charge because of this.

I've tried to revive a dead lipo by charging it without balance charge, and then switching to balance charge. I was monitoring the battery the whole time. As soon as it swelled up a bit, I cut the charge and disconnected. Battery was done!!

FYI, I have had relatively newer packs that I use regularly that have puff ever so slightly on me. I'm told this is normal on Revtech batteries. One of mines puffed slightly on initial charge (pack is about 1mm overall taller on both sides). I've ran about 20 cycles through it and it hasn't gotten worse, but keeping an eye on it... Even had Turnigy packs that have puffed up a bit, and then "depuffed" Pretty weird....

But safe to say once it swells quite a bit to a certain point, consider the battery done so you don't end up burning a place down...
Dan is offline   Reply With Quote
Old 08-14-2013, 08:21 AM   #12
Tech Master
 
Join Date: Aug 2010
Posts: 1,104
Trader Rating: 30 (97%+)
Default

I found brand new orion 3800 lipos, made by kokam in Korea, these are 5 years old but never used, still new in package, If I bought them, would they still old a charge or are they pretty much done, I wanted to purchase them as they fit perfect in my Tamiya, unless some one can point me in the correct direction, as who makes a similar hard case 2s lipo thanks
zaraz is offline   Reply With Quote
Old 08-14-2013, 08:51 AM   #13
Tech Elite
 
jlfx car audio's Avatar
 
Join Date: Nov 2007
Location: jackson,tn
Posts: 3,369
Trader Rating: 36 (100%+)
Default

Not to say they r bad but I wouldn't think they would be competitive . I would think resistance would be really high . and they may fall off fast.
Crappy fresh packs r usually still better than old good packs even tho its never been charged .
Its like a donut . u take a bite of one put it back in fridge with the others a week later u deside to eat them all none of them taste that way they did when fresh ...
__________________
Justin & Matt Lyons
Awesomatix USA, EA motorsports, Sanwa, Protoform, Avid, Gravity Rc , TSR!
a800s sanwa m12s
jlfx car audio is offline   Reply With Quote
Old 08-14-2013, 09:34 AM   #14
Tech Master
 
Mr RCTech's Avatar
 
Join Date: Dec 2005
Posts: 1,291
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by bvoltz View Post
What is your take on the new Trinity Revtech Formula "X"?
I ran the Revtech 100 C lipos. I have two packs.
Very good lipo made in Japan.
Good voltage, great for club racing.

The Sting lipos are just a notch better with longer voltage times then the Trinity Revtech Formula "X" lipos.
If it comes down to price the Trinity Revtech Formula "X" are good!
Mr RCTech is offline   Reply With Quote
Old 08-14-2013, 04:21 PM   #15
Tech Addict
 
32819toon's Avatar
 
Join Date: Mar 2006
Location: North of England
Posts: 580
Trader Rating: 1 (100%+)
Default

I have a lipo pack which I've had for almost 2 years. I noticed recently that with this pack my car was a bit slower and less punchy than with my other pack. Also, this pack has recently not allowed me to balance charge it, but only to charge it normally. Is this a problem ? It isn't puffy or bulging in any way ?
__________________
32819toon
VBC Wildfire D08, Yokomo BD7 RS, Schumacher Atom, Tamiya M03, M05 (outdoor Mini), M03RWD, MF01-X, BSR M-Rage, ABC Gambado, Associated TC4 (outdoor car).
32819toon is offline   Reply With Quote
Reply



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 06:36 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net