Rstrachan
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Flight distance : 148609 ft
United States
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(I hate losing my carefully crafted reply when I switch tabs to get quotes & links)
Read your Intelligent Flight Battery info in your User Manual and Safety Guide. Page 21 of the P3A User Manual v1.8 (2017-07-06) explains how to discharge to 8% but, doesn’t explain why or how often. (See below)
fwiw, links to updated User Guides are on the same page you download your aircraft firmware. The 1.8v is the most current for the P3A
As a R/C stadium truck enthusiast, I’ve read lots of forum threads regarding lipo batteries and their maintenance, usage and storage.
One thing to remember about that info? Verified information and thread rot. Verify to the best of your abilities. Thread rot should be self explanatory.
Generally, lithium-polymer batteries should not be discharged below 3v per cell. Most, if not all, newer devices, like the Phantom’s Intelligent Batteries, have a failsafe built in to prevent this. (As confirmed by Solentlife, this is the 10% Critical Battery warning).
Generally, regularly discharging P3 batteries, really any lipo, to the bare minimum can reduce its lifetime. It’s been my experience, in my other devices, that lipos have a longer lifetime if I don’t run them completely down. As an example, my wife’s cell phone is two years old and the battery only lasts 12hrs. She runs her phone dead at least a couple times a week. My cell, same phone, same age, lasts 24hrs. I rarely let my phone get below 50% charge. Extreme example but, it’s a real life one.
Here is a great non biased article for lipo battery health [url= http://batteryuniversity.com/lea ... ium_based_batteries]Prolong Lipo Batteries[/url]
This may explain why DJI says it’s ok to ‘completely’ discharge the P3 batteries every so often: “There is no memory and the battery does not need periodic full discharge cycles to prolong life. The exception may be a periodic calibration of the fuel gauge on a smart battery or intelligent device.” Battery Calibration
@solentlife, I’d like a copy of that spreadsheet or web form you calculated voltage based on percentage. Please and thank you. |
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