Battery Expert Need...
 

Battery Expert Needed

6 Posts
5 Users
4 Reactions
108 Views
Posts: 390
Full Member
Topic starter
 

Need some help to know whether my Drone battery is about to blow up my house!!

I have a DJI mini 2 and one of the battery packs wont charge to full capacity. Charging in either my drone or its battery pack charger (charges 3 packs) one pack stops charging with led 3 flashing. From what i can tell  thats cell over voltage cut off.

DJI say try draining and recharging. Flew it today no issues and charged but the single led flashes and charging stops.

the drone is registering it at93% when I plug it in and flight time wasnt unusually short.

Inidications are the pack is rubberducked but given it stips charging and drone flies OK should i be worried?

its a 2250mah Li-Ion with nominal voltage of 7.7V

 
Posted : 28/01/2024 7:43 pm
Posts: 5140
Free Member
 

Inidications are the pack is rubberducked but given it stips charging and drone flies OK should i be worried?

Yes. I would never leave that battery unattended while charging and would consider using a LiPo bag just in case.

 
Posted : 28/01/2024 8:09 pm
Posts: 390
Full Member
Topic starter
 

Thought so. I’ve got 2 others so recon i’ll just bin it.

 
Posted : 28/01/2024 8:21 pm
Posts: 33017
Full Member
 

Would it not be possible to open it up and see what cells it has inside? Then it ought to be possible to get a couple of replacements and fit them in place of the originals. If they’re the sort of size many of my torches use, then probably 14500 3.5v 900mAh, probably about £6 or so.

I’m still using TrustFire 14500’s I bought at least 15 years ago and I believe most battery packs use standard size cells, like 14500 or 18650, but there are several new size cells in common use now.

 
Posted : 29/01/2024 3:13 am
Posts: 11658
Full Member
 

...recon i’ll just bin it.

I know you may not be being literal with this statement,  but if it is damaged it needs careful disposal. 

https://www.bbc.co.uk/news/science-environment-63809620.amp

 
Posted : 29/01/2024 5:19 am
Posts: 390
Full Member
Topic starter
 

I know you may not be being literal with this

correct. <br /><br />

out local council collects them so save batteries up then leave them out for recycling. <br /><br />

Thought about opening it up or even trying to hook it up to my RC Car charger and see if i can charge / discharge but seeds of doubt. And I never get through the 3 cells that came as part if the smart charger bundle. <br /><br />

It can go and be recycled. 

 
Posted : 29/01/2024 7:51 am
tthew and tthew reacted
Posts: 11688
Full Member
 

Does their capacity increase when they swell up like this?

battery

 
Posted : 29/01/2024 9:14 am
Del and Del reacted