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Chaaaaaaarging!
#16
1. can i charge more... yes - i charge 4 batteries at once.
2. you need to always go back to storage - your batteries will live longer (try it out... i've killed few batteries already by keeping them at 100% for weeks - they are not dead... they just have very low capacity)
3. keep them all in storage... this way you simply charge them all

isdt... im in love for some time now (i moved from 4 buttons) power supply from old dell laptop (19V, 135W) allows me around 8C charging...
+ it is portable so you can get it with you on the field.. and use as discharge validation Smile
All the best
Grzesiek (Grisha/ Greg)

Curently flyable: Nox 5, Nox 3, Minimalist 112, Scrap at the moment... nothing is flyable
Bench / in progres: fixing Nox 5, Nox 3, Minimalist 112, Scrap
thinking about building: 450

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#17
For ISDT, you don't need a loud PSU. You can get a switching PSU, like the ones for laptop charging. You can probably go to an independent computer store. He probably have a few laying around. I probably wouldn't pay more than $10.
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#18
(03-Jan-2018, 07:00 PM)s3npai Wrote: On a side note, have any of you tried the "current sensor calibration" through betaflight? I was thinking of giving it a shot here soon and was just curious.

If I have a current sensor on a flight controller, I always calibrate it after the maiden flight.

All I do is take a fully charged battery and fly until the voltage warning comes on. Then I land and make a note of how many mA/h used are displayed on the OSD. Once home, I recharge the battery (in simple charge mode, not balance) and note how many mA/h my charger reports putting back into the battery.

If the the mA/h values don't match, I just calculate the new value for the current meter scale by:

current_meter_scale = old_current_meter_scale * (reported_draw_mAh / charging_data_mAh) 

After correcting the current meter scale, I go and fly a second fully charged battery and repeat the procedure to check that the scale value is now accurate. If not, calculate again and repeat until happy!
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