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Battery Long Term Storage
1902 10 2015-12-18
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Tony Tronic
lvl.3

United Kingdom
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I haven't been able to fly recently because of the winter weather and it doesn't look like its going to get better anytime soon.

I always charge my batteries up to 50% after I've been out and have been using them on a regular basis, but it looks like it could be a couple of months till I can use them again.

What is the best thing to do with them, I checked their charge a couple of weeks ago and I still had two lights on each, if they have self discharged below 50% next time I check, is it best to keep on topping them up to 50%?

I understand that  they will enter hibernation mode at some point, is it best to leave them in this state until I wish to use them again?

I'm worried they will self discharge below a % which they can't be revived from. I have 5 x TB48's and 1 x TB47 which is a lot of money to lose if they die on me.

Any help would be appreciated, thanks.

2015-12-18
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Sir Shepherd
Second Officer

United States
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@ Tony, Ask Paul he is the expert truly, when it comes to battery issues and other issues this is the go-to-guy!
2015-12-18
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Tony Tronic
lvl.3

United Kingdom
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Thanks for the responses but they haven't reallly helped.
I'm particularly interested in topping up versus hibernation and whether they will become unusable at some point if I don't manage their charge %

Thanks
2015-12-19
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Tony Tronic
lvl.3

United Kingdom
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PaulKerry Posted at 2015-12-19 17:23
Sorry, Tony. Let me see if I can offer a little clarity.

Thanks Paul for the detailed response, very helpful.

My concern about how far a battery will self discharge is because one of the TB48's I bought was at 7% when I received it, all the other batteries were around 50% when received, I presumed it had been on a shelf somewhere for a while self discharging.

If anyone else ( especially from DJI ) has some advice, I would be very interested, thanks.
2015-12-19
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DJI-Tim
DJI team

Hong Kong
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PaulKerry Posted at 2015-12-20 01:23
Sorry, Tony. Let me see if I can offer a little clarity.

no, Paul, you are an expert
2015-12-20
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Tony Tronic
lvl.3

United Kingdom
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PaulKerry Posted at 2015-12-20 00:57
You can actually check the battery history to find out if it has entered self-discharge mode.

How ...

I've checked all of the batteries here are the readings:

1 TB47 39% 3.68v
2 TB48 39% 3.73v
3 TB48 39% 3.72v
4 TB48 39% 3.72v
5 TB48 39% 3.74v
6 TB48 39% 3.73v

Would you top them up to 60% or leave them?
The DJI Intelligent Flight Battery Safety Guidelines document recommends 30%-50% for long term storage, but understand that DJI documents can be different to real world experience.

As I said when I stored them they were all on 50%, so presume their charge will keep on going down. Do they act any different to a camera, laptop or cordless drill battery which all lose charge when their not used.

Thanks
2015-12-21
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Tony Tronic
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United Kingdom
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DJI-Tim Posted at 2015-12-21 04:11
no, Paul, you are an expert

DJI-Tim do you have any advice for me? Would be nice to have the DJI view on this.
2015-12-21
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DJI-Tim
DJI team

Hong Kong
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PaulKerry Posted at 2015-12-21 21:32
Here's an old joke...

"ex" means "has been" and a "spurt" is a drip, under pressure.

lol
2015-12-21
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DJI-Tim
DJI team

Hong Kong
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Tony Tronic Posted at 2015-12-21 23:39
DJI-Tim do you have any advice for me? Would be nice to have the DJI view on this.

well, as Paul already said,  you have to keep your batteries at around 60 % of charge
2015-12-21
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Dody
lvl.2

Pakistan
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PaulKerry Posted at 2015-12-20 05:57
You can actually check the battery history to find out if it has entered self-discharge mode.

How ...

"You can actually check the battery history to find out if it has entered self-discharge mode."

please do guide me how can i check the battery history ? thanks.
2015-12-22
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Dody
lvl.2

Pakistan
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hey paul thanx for the reply. yes i saw these earlier many times in my status. mine always showed 'normal' for all records , which eventually got boring for me because i didnt know that there could be anything else apart from normal mentioned in there :p
2015-12-23
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