I have been using Lipos for quite a while now, have stuffed quite a few from not treating them right but eventually I learned.
Started Flying Helis about 12 years ago. Big ones, small ones, Nitro ones, you name it I have probably flown it or at least set it up to fly.
Lipos dont like to have more than 80% capacity taken out of them. This is around 3.7-3.75V
Storage charge lipos ALWAYS, it increases the amount of charge cycles you will get.
Unlike nimh, lipos like to be charged as fast as they will take. This is usually dependant on C rating.
20C batteries usually not more than 1C eg 5000mah 20C can be charged at 5amps
30C can usually handle a 2C charge eg 5000mah 30C=10 amp charge
My 45C heli batteries I charge at 5C eg 5000mah=25amps these are high performance 6s Heli packs not recommended for all packs
You get the idea, but i always storage charge whether leaving for a day or a week or a month.
It isn't that hard, just stick them on the charger after use. Lipos dont like to be left above storage charge either they prefer to kept around 3.8-3.85v/cell
In my opinion, and remember opinions are like arseholes, low voltage cut off in car ESC's are way too low.
By the time you have hit the LVC you have taken charge cycles out of your pack. I have seen it way too many times.
Perfectly good pack with low internal resistance (1-2 milliohms/cell) taken a bit low once (Less than 3.7V/cell) and the internal resistance goes up, this isn't heathly for your pack. I run my lipo alarms for the cars at 3.6V/cell as you get cell bounce once the load is removed from the battery which usually ends up at around 3.7-3.75v/cell which is 20% of capacity.
I use a Revlectrix pl6 charger which most people won't shell out the cash for but i highly recommend.
I can get reading for internal resistance of each cell, it tells me how full the pack is in percentage and allows me to charge at up to 40amps
Now with that it requires a 12-24v power supply mine is 60A
I spent the money a while ago and have never looked back, haven't ruined a pack from missuse in a while either, but i was using expensive packs and still have them 5 years later. They aren't as fresh as they once were but they are still going. $250 US per 6s 5000mah 65c pack. I would Fly one pack while other charged on this set up at 25-30amps. Nothing like the packs i am using now for the cars.
If i was buying a charging set up today, I would look for at least 100W for 2s batteries that had the ability to storage charge.
Something like this can be picked up for well under $100 AUD, this is a minimum if you dont want to be ruining cells
Sorry for the long winded post, and remember this is my opinion based on 5 years of ruining lipos unknowingly before i was educated by experience
