Looks good, but does the 65% mode discharge a fully charged battery to get there? Or does it only charge up a discharged battery to 65%?
Discharge batteries to storage condition
- Thread starter raylo32
- Start date
woodbutcher50
Well-Known Member
I have the IRC one coming. Plus I bought the cheap dual car charger and will make a couple of cables for my Prodigy. That should cover me.
woodbutcher50
Well-Known Member
Amazon.com: Car Charger for DJI Mavic 2 Pro/Zoom Intelligent Multi Dual Charger Fast Charge 2 Battery & 1 Transmitter Dual Battery Parallel Charger: Electronics
Buy Car Charger for DJI Mavic 2 Pro/Zoom Intelligent Multi Dual Charger Fast Charge 2 Battery & 1 Transmitter Dual Battery Parallel Charger: Car Chargers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Here is the charger: Amazon.com: ISDT Q6 Pro Charger BattGo 300W 14A Smart Pocket Lipo Battery Balance Charger for/Life/Lilon/LiPo/LiHv/NiMH/Cd/Pb RC Models DIY Q6 Plus Upgraded Version: Gateway
Here is the Parallel Board:
Amazon.com: Paraboard Parallel Battery Charging Board Plate for LiPo with T Dean Plug Connector for imax B6 B6AC UN-A6 Charger Adapter Expansion Board: Gateway
Amazon.com: Paraboard Parallel Battery Charging Board Plate for LiPo with T Dean Plug Connector for imax B6 B6AC UN-A6 Charger Adapter Expansion Board: Gateway
www.amazon.com
kilomikebravo
Well-Known Member
Ray: The RCGeeks charger has a switch for 100 and 65 so no, it won't DIScharge down to storage level, it will only charge up to it.
That's what I suspected from the photo. Looks like a good charger that will work great as long as you always fly all your batteries down. My RC Prodigy charger will be a good option for me to at least perform the discharge function... and will likely provide a faster charge as well. I wonder what the C rating is on the Mavic 2 batteries? That would be helpful in deciding how fast to charge.
Well, good news and bad news. I made up a connector with bullet plugs to jack into my Protek 610 charger. It works fine for charging the M2 batteries in bulk mode, i.e. no balance connector, and the battery's BMS worries about balance. But in Storage or Discharge mode I get "cell connect error" which means the charger is looking for a balance connector and not finding it. So it looks like it does not have a straight bulk discharge mode. What a PITA.
Meanwhile my el-cheapo Amazon discharger came and it works, but at 1.5A it is very slow... and gets very hot. Converting chemical energy to heat is how these things work but this unit is small and I wonder how long it will last before it cooks. Oh well, there are more expensive dischargers available but it's too bad my existing charger won't work.
I might pick up one of these: https://www.amainhobbies.com/gforce...JSyvanC_ZjkNEyYug2Ouh4uJ16Y5twFhoCoYsQAvD_BwE
Meanwhile my el-cheapo Amazon discharger came and it works, but at 1.5A it is very slow... and gets very hot. Converting chemical energy to heat is how these things work but this unit is small and I wonder how long it will last before it cooks. Oh well, there are more expensive dischargers available but it's too bad my existing charger won't work.
I might pick up one of these: https://www.amainhobbies.com/gforce...JSyvanC_ZjkNEyYug2Ouh4uJ16Y5twFhoCoYsQAvD_BwE
AMann
Well-Known Member
Would this work? $4.73 with free shipping:
Charging Cable Adapter for DJI Mavic Pro Battery to Balance Charger B6 B6ac for sale online | eBay
Find many great new & used options and get the best deals for Charging Cable Adapter for DJI Mavic Pro Battery to Balance Charger B6 B6ac at the best online prices at eBay! Free shipping for many products!
rover.ebay.com
TLDR; I'm Cheap, use short-charging method.
Given the price of these batteries and in general being frugal or wanting to extract maximum value for money, my preference is to never be in a position of having to discharge the batteries in the first place. So my setup is simple,
1) Keep the batteries at storage most of the time, unless I intend to fly.
2) Use a parallel charger to charge all 3 up
3) Connect parallel charger to remote timer (can be triggered remotely or programmed to turn on) -
4) Charge batteries fully as close to the time I intend on using them
5) Fly them down to ~20-30%
6) Let each battery cool to room temperature.
7) Connect all 3 to parallel charger and charge back up to storage charge
8) Program the timer for a 15min charge and then switch off
Rinse Repeat
The time it takes depends on charger but on the RCGeeks 5A, I can get back to storage levels with ~15min charge, that way it only takes ~40mins to charge back to full when I intend on using them. This way I dont waste cycles on trivial items such as charging my phone/tablet, wasting money on dischargers from Amazon etc.
If they were cheap $40 hobby grade LiPos I probably wouldnt care so much but Mavic 2 batteries here retail $239AUD each. Works out to ~$1/flight assuming it even lasts 240cycles - thats not cheap. My oldest and most used LiPo had done 110 cycles so probably closer to $2/flight for me.
Given the price of these batteries and in general being frugal or wanting to extract maximum value for money, my preference is to never be in a position of having to discharge the batteries in the first place. So my setup is simple,
1) Keep the batteries at storage most of the time, unless I intend to fly.
2) Use a parallel charger to charge all 3 up
3) Connect parallel charger to remote timer (can be triggered remotely or programmed to turn on) -
4) Charge batteries fully as close to the time I intend on using them
5) Fly them down to ~20-30%
6) Let each battery cool to room temperature.
7) Connect all 3 to parallel charger and charge back up to storage charge
8) Program the timer for a 15min charge and then switch off
Rinse Repeat
The time it takes depends on charger but on the RCGeeks 5A, I can get back to storage levels with ~15min charge, that way it only takes ~40mins to charge back to full when I intend on using them. This way I dont waste cycles on trivial items such as charging my phone/tablet, wasting money on dischargers from Amazon etc.
If they were cheap $40 hobby grade LiPos I probably wouldnt care so much but Mavic 2 batteries here retail $239AUD each. Works out to ~$1/flight assuming it even lasts 240cycles - thats not cheap. My oldest and most used LiPo had done 110 cycles so probably closer to $2/flight for me.
Good news..... if your flying down to 25% average that runs to 75 cents a flight. A charge cycle is 100% if the recorded pack capacity.
Thats Mavic Pro, you want the Mavic 2 cable instead if thats the drone you fly. I ordered some back in December and the idiot sends me cables for the Mavic Air instead - Got a refund (I already had Mavic Air cables). Ended up finding a seller slightly more expensive who knew the difference and sent me the proper cables.Would this work? $4.73 with free shipping:
Charging Cable Adapter for DJI Mavic Pro Battery to Balance Charger B6 B6ac for sale online | eBay
Find many great new & used options and get the best deals for Charging Cable Adapter for DJI Mavic Pro Battery to Balance Charger B6 B6ac at the best online prices at eBay! Free shipping for many products!rover.ebay.com
Battery Charging Cable Adapter to B6 B6AC Balance Charger for DJI Mavic 2 Drone for sale online | eBay
Find many great new & used options and get the best deals for Battery Charging Cable Adapter to B6 B6AC Balance Charger for DJI Mavic 2 Drone at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Good to know.
Dragonfly
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This is correct and it is mentioned in the battery manual / information.
AMann
Well-Known Member
I don’t get the math, are you saying at $130 per battery, the battery life is only good for about 100 flights?
No. I was simply saying that a charge cycle is determined with reference to the capacity. If you fly from 100% down to 25% and recharge that counts as 75% of a cycle as reported by the battery. With reasonable treatment you should get significantly more than 100 cycles from a battery.
That's pretty much how I operate. I even do that with the larger hobby grade LiPos for my Iris+. But there are times when you unexpectedly get cut short and just can't fly every battery that is charged up hence the need for a discharger. It's easy with my standard XT60 batteries since the Prodigy puts them in storage at the touch of a button by automatically charging OR discharging as necessary. Too bad we have to do this manually with these Mavic batteries.
I have sent an inquiry to Prodigy as to whether any of their models have a bulk discharge feature so a smart battery that doesn't have a balance connector can be discharged. Does anyone here have another brand that will do this? My model 610 has the ability to create a user defined profile and I will see if I can make it work that way.
AMann
Well-Known Member
Your spell check messed up, that post or yours above said it was “75 cents per flight”!
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