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Battery Care - OK to keep on charger?

I have been storing the batteries (Mavic Pro) at between 30% and 40%. That was the advice I read somewhere. Is that OK or is 65% better?
40% is perfect, storing them in the coolest place possible but now below freezing will ensure the most amount of cycles/longest battery life. 65% is OK but is still above LiPo storage voltage. Also depends how long you intend on storing them. 65% for a week or two will be fine. But long term 40% will give you the best performance.

Leaving them at 100% for 10 days is really not ideal for a LiPo battery long term. DJI should offer you the ability to drop this to 24/48 hours if you know you will not be flying for a week or so. However of course I’m sure there is an element of they want to sell those nice expensive. Battery packs to you as a continued revenue stream.

Best thing to do is once discharged just charge them to 50% (two lights on the battery) and stick them away until you need them. Charge them the evening before the day you fly and your going to get much better life out of them than someone who charges them and keeps leaving them full for 10 days. Of course everyone will have their own opinion on the matter but as some one who has worked with LiPo for many years and heavily involved in EV batteries and Energy storage Cycling and not keeping packs at 100% is critical to life expectancy. For example a fully charged Tesla/Nissan leaf is not fully actually charged. They leave some headroom in the cells so they never go to 100% to ensure the cells last as storing any lithium technology at 100% unfortunately damages the cell. Until the scientists bring us a new technology we are stuck with the tech we have. They still offer the best KWH per KG going currently and have the benefit of huge discharge currents.

If you really want to get **** there is even more you can do to ensure long life with storing the cells at certain temperatures but 40% will see you hundreds of useful cycles in after some dead battery packs to re cell some of these batteries if anyone has dead/poor performing packs. Happy to re cell a few FOC just to play with these packs and see what the actual “intelligent” part is doing.
 
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I have been storing the batteries (Mavic Pro) at between 30% and 40%. That was the advice I read somewhere. Is that OK or is 65% better?
I store my DJI batteries anywhere within the range below. Never had a problem with them yet.

76224
 
It would be nice if some afer market vendor would come up with a harness to charge Mavic2Pro batteries with using a Hobbymate D6. With that charger you can charge, discharge and charge to storage. You can even set the charge to storage to storage to you liking. It also charges liIon, the live type, nicads and others.
 
Dam it, not available in the UK. First time I’ve seen a charger like that.
You should have no problems ordering it via the German Amazon site.

Took about 1,5 weeks to deliver to Austria, works as intended, charged nicely 4 batteries at once to 65 % without getting hot.
Only the supplied power cable was wrong but I got a refund on this part.

So, highly recommended.
 
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