Amperage meter calibration for FPV Flights Betaflight

Calibrate your Betaflight battery amperage meter to insure you have sufficient battery power to return on long range FPV flights. Accurate meters is vital to manage battery power properly. Here is how to do it in Betaflight.

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[GiantAntCowboy]

Another super helpful video for folks, well done. This is super important and often overlooked which can result in damaged packs or worse lost quads…
I usually do a quick comparison of the Charged mAh to my OSD after each flight, and to anyone that can’t get it perfect, error on the high side, so your Current and mAh used are higher than real-life. This will creat a little extra safety net.
Thanks for making this video! Cheers!

[wiktor_blazynski]

Great idea to create excell for that kind of stuff! Thanks for the video

[BikeGuyFPV]

It should be noted that when charging the battery back up after getting your initial OSD mAh reading to see the charger in non-balancing mode.

This will prevent extra mAhs from getting put in due to balancing of the cells. It's recommended to only do this with batteries you trust (new versus worn batteries) to get a better current scale number.

[aowi]

I've chased this for a long time. The best it will get is "somewhat close', within about +/-200mah. Like you said, different batteries have different internal resistance, if you change # of cells it will be off by more. How fast you discharge i.e. Acro vs cruising. Ive found a number where some batteries are a little high and some are a little low. As batteries age you won't get as many mah out of them before they sag. The thing is to leave yourself some reserve and watch the cell voltage.

[Drew_Pearson]

Great info! I wish there was a way for this to "just work" regardless of the payload/battery choice but maybe Betaflight will figure that out one day. For now I'll try your method! My OSD is certainly WAY off from reality (or what my charger says at least).

[lorenshartingers]

Just want to add you need to calibrate the Amp meter to your flying style. Heavy on the throttle will produce different results in calibration vs slow flying.

[AZ-FPV]

This is very useful - thanks for posting this .Quick question - if you have a 1000 mAh capacity battery, how many of those mAh do you want to use to be safe (for returning the quad and to avoid battery damage). Thanks.

[drone]

Thank you for great content, once again.

Can you tell me what kind of % of a pack you utilize?
If your pack is 6000mah, do you draw 5000mah? Or what's your rule?

*Thumbs up*

[jeffclassics]

So the formula I used was inversed. Bf*charger/osd. The correct is bf*osd/charger. I have question though. Why a different battery would need a different calibration? Let's say they're identical sony vtc6 packs, is that because of battery health? Another q, can we do calibration even though we sample flight only. Say lipo 1.8Ah, I'll fly for 30 seconds, record osd, charge my battery maybe now at 80% then to 100%, record and do the calibration. Seems I'm not violating the formula? Many many thanks.

[lililililililili]

When trying to get the number from the charger is it less accurate to charge at 2C

[nagmo]

Hello~ I need a old scale!~ How many old scale values ​​should I enter? FC: MAMBA H743 / ESC 40A bls / Battery 7000Mah lipo