“PUFFED” BATTERY PACKS AND WHAT TO EXPECT!
Due to increased warranty claims concerning LiPo batteries we feel it necessary to dispel a few half-truths and make some factual comments which will guide you in your warranty requests from whoever you purchase your Lipo Batteries from.
Point 2: Most of the Chinese manufacturer’s are aware of people charging and discharging at very high charge and discharge rates exceeding 40 amps. Not only is this incredibly dangerous for yourself and the people who surround you while racing, it should be noted that if “YOU FEEL” you need this edge in voltage etc and will not follow the R.O.A.R guidelines (maximum 4.2 volts for 1S and 8.4 volts for 2S), you cannot expect manufacturer’s to guarantee or warranty the products which were misused.
Lipos generally puff as a result of a chemical reaction within one or more of the cells within a “hard-case pack”! While better cells will handle energy exchange better, some cells naturally expand during a charge or discharge cycle. Due to the increased capacity and the dimensional constraint of “case size by sanctioning bodies” there is a finite area within the case that give the cells some area to expand without deforming the hard-case.
In essence the “case” is one of the biggest problems with our current Lipo battery brands but due to the sanctioning body we have no alternative but to continue using the case (it’s a rule).
Here are some reasons why batteries puff and what not to do.
1. OVER-CHARGING – which means charging at too many amps or charging over the legal voltage. It’s best to just use the legal charging methods supported by R.O.A.R. (4.2v for 1s and 8.4v for 2S)
2. Improper storage – leaving batteries fully charged or dead with nothing in them after you race. Most chargers have a “storage” mode for lipo batteries… Use it! This will prolong the life of your batteries.
3. Over-Use – Each battery only has so many cycles in it, so don’t use the same battery every race. Alternate between 1 or more battery packs each race. Although this sounds expensive (purchasing multiple packs) it is cheaper in the long run. Whoever told you that you can buy one Lipo battery and run it forever is probably the same person who told you every brushless motor is the same, runs the same speed and will never need any maintenance.
4) If you run (Dump a pack too low on the track) and then instantly recharge it, 9 out of 10 times it will puff.
5) Temporary case expansion sometimes is acceptable but packs that don’t return to their near pre-use (charge/discharge) size and remain puffed should be discarded appropriately. You have ruined the pack! Normally after the battery has come back down, if you push in with your finger and you can feel a little space between the case and the insides that is acceptable. All that has expanded is the case itself.
6) Ambient temperatures/humidity and charge/discharge rates can and WILL effect a packs ability to deal with cell expansion and recovery.
Fewer and fewer companies are “doing NO warranty whatsoever” for “puffed” packs. Due to the way battery packs are charged and the manufacturer having no clear way to ascertain if the battery packs were misused under charging or discharging the manufacturer’s really have no other recourse.
What Trinity and ReVtech are doing:
Battery Warranty Program
Full warranty for 30 days from date of purchase (with the exception of “puffed” battery packs).
*THE ONLY WAY A BATTERY PACK CAN RECEIVE A WARRANTY IS IF THE BATTERY PACK IS SENT BACK AND ALL THE PAPERWORK IS FILLED OUT IN THE BOX YOUR BATTERY PACK CAME IN PLUS THE ORIGINAL SALES RECEIPT”
After initial warranty time a replacement battery can be purchased at a pro-rated amount depending on the age and when you purchased.
*Original Receipt is required
30 to 90 days after purchase 60% off MSRP
90 to 120 days after purchase 50% off MSRP
120 plus days after purchase 40% off MSRP
The MSRP pricing can be found following this link to the catalog download on the Trinity Web Site, or click on the banner on top of the home page.
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