Suspected overuse of a Lipo battery

D

Deanoverton

Member
The Fluoreon 3s 3000mAh 30c battery I bought last week has been used about 20 times so far but only today - after I received my battery checker, did I realise that I have not been following my instructor's guidance (!) about not ever letting the battery drop below 20% and preferable not below 25% charge (for safety). I have been consistently running it down to 7%. Apart from the risk this implied for my F450 (thankfully nothing happened), have I buggered the battery? If I have, can I do anything to put right what I have done or is this now a battery that I should declare as u/s?

Deano
 

Benjamin Kenobi

Benjamin Kenobi

Easy? You call that easy?
Hey mate,

You may be okay. It's not the voltage that applies to the 20% rule, it's the mah or capacity. Do you know how many mah you've been putting back into it after each charge? As an example, a 5000mah lipo you should put back ideally no more than 4000mah.
 


D

Deanoverton

Member
Ben / Anyone else

I note that my Revelextric Charger reports on the internal resistance of my batteries. I know that you can also tell if the batteries are u/s if they have a high resistance. What would be a high resistance for these batteries i.e. a time when I should stop using them?

Deano
 



PeteDee

PeteDee

Mr take no prisoners!
Yes everyone should have a read. Not so helpful if you can't measure the IR, easy with my PL6 though.
 

Motopreserve

Motopreserve

Drone Enthusiast
PeteDee said:
Yes everyone should have a read. Not so helpful if you can't measure the IR, easy with my PL6 though.
Click to expand...

My charger reads the IR for each cell. I've been keeping a record of that with the excel sheet I have for battery charging/performance.
 

PeteDee

PeteDee

Mr take no prisoners!
No so good when you are parallel charging but good to check from time to time.

I have a laminated card with the two tables back to back sitting where I charge for easy reference.

Pete
 

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