Now THIS is a real multi charger!
- Thread starter flumpet
- Start date
you beat me to it. I was just about to post this
I'm not sure If I'll do it. I'll just leave it as is probably.
LakeTravis
Well-Known Member
Gotta love Fry's, I can spend hours wandering in there. They have just about everything for the DIYer!! Glad there's one in Austin!!
iFlyForFun
Well-Known Member
A Mavic battery depleted to 15% takes approximately 45 minutes to charge using the DJI OEM car charger. The Mavic battery is 3830 mah and charging at 1C would require 3.8 amps. Since the OEM car charger is rated at 6 amps, doing a little math gives you a C-rate of 1.58C. I have yet to come across a Lipo battery that can not be safely charged at 2C but the fact is that the slower the charge the longer your batteries will last.
Let's round off the 1.58C to 1.6C. Basically, all this means is that if you parallel charge Mavic batteries and you want them to all charge in 45 minutes then you need to provide 3.8 amps per battery x 1.6. Charging 3 Mavic batteries should only take 45 minutes if you provide 18.24amps. The Mavic batteries are part of a new bread of intelligent batteries that have the charger built into the battery. The control unit, the balancing plugs, temperature sensors and all the parameters that we would normally set on something like my "icharger 208B" are all automatically controlled inside the battery.
As other members have correctly pointed out, all you need is a power supply providing the correct voltage and enough amps to charge the amount of batteries you want to charge together!
With the Mavic batteries all the work is done for you internally. You don't have to worry about C-Rate or buying a para board. All you need is a good quality power supply. I can't comment on the quality of the 5 in 1 charger because I don't have one. I will say this, it only provides 13.5 amps across all 3 charging connectors. That's only 4.5amps. To bad they did not match the amperage of the car charger and provide the 6 amps per connector.
If you want truly excellent parallel charging capabilities, like being able to charge up to 7 Mavic batteries together in parallel in less than 45 minutes( requires almost 50 amps ) then just wait a few more months till the after market suppliers start selling the Mavic battery plugs with banana plugs on the other end so you can plug the charging cord directly into the power supply of your choice. Ive been using 2 dell server computer power supplies connected together, providing 50amps to parallel charge Lipo batteries for years. You can build this yourself for less than $50 bucks and when your done you will have a top notch, hi quality power supply that can charge just about anything you throw at it. So if your not in a rush just wait a few months.
Let's round off the 1.58C to 1.6C. Basically, all this means is that if you parallel charge Mavic batteries and you want them to all charge in 45 minutes then you need to provide 3.8 amps per battery x 1.6. Charging 3 Mavic batteries should only take 45 minutes if you provide 18.24amps. The Mavic batteries are part of a new bread of intelligent batteries that have the charger built into the battery. The control unit, the balancing plugs, temperature sensors and all the parameters that we would normally set on something like my "icharger 208B" are all automatically controlled inside the battery.
As other members have correctly pointed out, all you need is a power supply providing the correct voltage and enough amps to charge the amount of batteries you want to charge together!
With the Mavic batteries all the work is done for you internally. You don't have to worry about C-Rate or buying a para board. All you need is a good quality power supply. I can't comment on the quality of the 5 in 1 charger because I don't have one. I will say this, it only provides 13.5 amps across all 3 charging connectors. That's only 4.5amps. To bad they did not match the amperage of the car charger and provide the 6 amps per connector.
If you want truly excellent parallel charging capabilities, like being able to charge up to 7 Mavic batteries together in parallel in less than 45 minutes( requires almost 50 amps ) then just wait a few more months till the after market suppliers start selling the Mavic battery plugs with banana plugs on the other end so you can plug the charging cord directly into the power supply of your choice. Ive been using 2 dell server computer power supplies connected together, providing 50amps to parallel charge Lipo batteries for years. You can build this yourself for less than $50 bucks and when your done you will have a top notch, hi quality power supply that can charge just about anything you throw at it. So if your not in a rush just wait a few months.
rustydiver
Well-Known Member
That sounds a good idea I've got a great 4 way charger which runs off a separate psu. Wasn't cheap but after my experience off a cheap multi charger off eBay it had good reviews it went Bang and smoked wouldn't touch another again.
I could do with a good xt60 or xt90 to dji adaptor.
I could do with a good xt60 or xt90 to dji adaptor.
Marc Hufnagel
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PropPilot
Well-Known Member
rydfree
Well-Known Member
I have always used old computer power supplies and for the past few years the converted Dells as you do . They work perfect and I am waiting for a supplier to make the Mavic lipo connections available . I was tempted to buy the cheap blue charger just to snip the leads off ,lol
iFlyForFun
Well-Known Member
Great minds think alike!
I was also tempted to do the same!
I have 4 Mavic batteries and figured I can wait a few months. It's all about convenience.
Can someone please write the total power draw of the charger in Watts so it is clear how strong an inverter one needs to buy to charge the batteries from the car? Would a 200W one suffice?
Just bought one of these and have yet to add the ground wire, which is something I plan on doing. Pretty easy mod. I tested it out and with two batteries charging from about 30% it took about 80 minutes. I was a little surprised, for some reason I was thinking it would be quicker. One thing that was a little unsettling is when plugging it in to a wall socket the plug sparks. It's too bad they didn't include an on/off switch. I tried it with batteries plugged and unplugged into the charger and it didn't make any difference.
PropPilot
Well-Known Member
Pretty easy to add an inline on/off switch. I used a file, filed a square hole and installed a rocker switch on the top of the case. As for the sparking, it is the electrolytic caps charging up super fast when you plug into the mains. A bit unsettling but not dangerous in any way.
Mavic 57
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My "blue" Mavic charger came with the earth pin connected to the case, HOWEVER the manufacturer had not scratched the paint off underneath the washer and therefore when tested there was no continuity to the earth. I scrated the paint under the washer to the bare metal, refitted the bolt and tested, the case is now earthed. Nice try by the manufacturer, but failed to earth effectively. I'm in the UK 230V we like metal to be earthed for safety.
Kestrel
Well-Known Member
I've been using this charger for a long time now and I haven't seen any damage to my batteries, and it doesn't charge them quicker.
Love mine and just to reiterate, this is not truly a charger it is just a 13.5v power supply. No different than an official DJI "charger". The PROS of this device are that it essentially has 3 DJI power supplies inside its blue housing PLUS 2 USB power supplies as well.
DJI batteries have all the charging smarts built in so they will accept a steady 13.5v from anything to charge themselves.
DJI batteries have all the charging smarts built in so they will accept a steady 13.5v from anything to charge themselves.
I haven't actually taken a look inside the unit yet. Mine could be the same. Save me a few minutes if it was.
harryb
Well-Known Member
Here's a $12.00 parallel charger.
3 in 1 Parallel Multi Battery Charging Hub Board Fast Charger For DJI Mavic Pro | eBay
3 in 1 Parallel Multi Battery Charging Hub Board Fast Charger For DJI Mavic Pro | eBay
harryb
Well-Known Member
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