I'm sure the answer to this question is in another thread but I cant find it so here goes. When I put my LIPOs in storage charge, can I top them UP when I wish to fly or should I use them from the storage charge!
Strange then that all chargers aim for 3.8-3.85V when you use the storage function. I also use the fridge for long term storage, but for packs i use regularly i tend to just leave them at room temperature.
My batteries are 6s 5000mAh and are rated between 40 and 60C, so their price makes me want to keep them at their best health
I used to charge the batteries when I arrive home, so they would be ready whenever I want. Between work and family, in the last 4 years, it could pass 3 4 months between fly days, so I kept them at full for long periods.
3 of 4 batteries died this year when I returned to be more regular, with 2 or 3 days per month.
Now I fly almost every weekend. I charge the batteries the night before, and in the night after flying I bring them to storage voltage.
Every charge-discharge cycle brings the battery closer to the end, but my doubt was what could be more harmful: one more discharge-charge cycle or keeping the battery at full for 1 week?
Leaving the battery fully charged is definitely to be avoided. For best battery life you should minimise the time spent fully charged as far as reasonably possible. Best to charge just before flying and if for any reason you don't use a battery discharge it as soon as possible.
In the real world of course this isn't always possible. Leaving them charged a while as a one off wont do appreciable damage keep repeating it and it all adds up.
I've invested in a powerful charger so i can charge just before flying, i can have them all charged in 45 minutes or so.
You can get more than 300+ high demand (100+ amp from a 20C/40C burst 5000 mah pack) cycles out of a pack. THEN move it to lower demand for another 300+ cycles.
Generally my LiPo packs die from old age before they die from cycles. Regardless of cycle history I note decrease in current delivery capability (lower effective C rating) at 2.5 to 3 years. Then over the next year the capacity and current delivery keep declining.
That is with good storage practices.
Poor storage can kill a pack quickly. Store full charge in a hot car and its potentially destroyed in less than an hour.