lipos

[Dean airwolf]

Hello all
What is the % you need to leave in the batterys after flying big or small.
Thanks in advanced
Dean

[Grumpy]

Ater flying they should have at least 20% remaining which corresponds to about 3.7V per cell. Going a bit lower occasionally wont do any harm but if run too low regularly battery life will be reduced. Leaving more in the pack is perfectly fine but just means you could be flying a little longer.

For long term storage ideally the battery want to be about 50% charged which is around 3.85V per cell but a little either way is ok.

[moggyp18]

+ 1 with grumpy

[Mutley]

As this is on the beginner section just thought i'd clarify the 20% refers to the MAH left in the pack, so if its a 5000mah pack then 1000mah should remain, if its lower then reduce the timer. I would recommend using the timer.

Once you know this you can then monitor the charge, 5000mah pack, 4000mah should go back in or there about's - if it doesn't either your pack or the charger may have an issue.

I dont personally monitor the voltages to give me a guide on pack usage but the MAH used, but i do use a voltage meter on each pack after every flight to note the cell voltages and a uniform discharge.

[Nigel Armstrong]

There are several cheap lipo testers available that will give you a quick check at the flying field of the % left in your pack after flying. Most have the ability to check the total and individual cell voltages. Set the timer on your TX to remind you when to land. The timer should be reduced in the winter to allow for reduced flight time in colder weather.

[rimaarts]

doesnt most of lipo checkers go by voltage? and once battery gets old, voltage doesnt represent mah taken out? safest to check is to get a charger which shows mah put back in. set your timer, fly, go home, charge, and seing how many mah you put back in, adjust your timer...