Gh0stxSinghx
Well-Known Member
- Joined
- Oct 20, 2016
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Ordered some of those Thunder Power batteries today. Anybody have any feedback on them? I've been flying with Proteks but I lost 2 of them in a crash and the other 2 are starting to swell. I'd been charging them on 5 amps and ran them down to 0 a few times. I might get some more Proteks but wanted to give the Thunders a try. They seem to have a good power/weight ratio and more total power than the Proteks.
Pushing the stock battery is a great way to crash I have found.Lol I tested this last night and it dropped out of the sky abruptly. I wasn't running externals. Luckily I was only a few feet off the ground.
Hi, I'm frenchflyer !!
Can i use this battery :Batterie Lithium Ion 3S 7000 mAh 2C (XT60) - Titan
Thanks
Wow - Very Cool CyberNate! I noticed that you were 31mph out and 33mph on the way back - obviously light wind. Did you have it in non-sport mode with full forward the whole time?? - it seems like you would have had to do that to keep the speed so steady.So I decided to brute force it to the distance limit today. Strapped on 3 Proteks and just powered out there with stock Mavic and Platinum propellers. 58,820ft out and back. I'll post up the video later.
Here is video. The signal with 4Hawks XR panel is awesome when boosted. I had some big interference from those high tension power lines I flew over, but once I got far enough away, signal came back strong!
If you are interested in using LiIon batteries with the Mavic then take out the Mavic battery and replace it with LiIon cells wired as a 4s2p or 4s3p battery. You will then be able to use the full capacity of the the LiIon cells. I have just been testing a 4s2p LiIon battery, and I find that it will hover for 33 mins, compared to 24 mins with stock battery under the same conditions.
What do I need to change in assistance in order to accept 4s Pack?
I guess you recommend using the LiIon‘s without the intelligent battery plate?
thanks and cheers
I have tried this battery, many others here have tried it as well and it's just not a good battery for the Mavic.Hi, I'm frenchflyer !!
Can i use this battery :Batterie Lithium Ion 3S 7000 mAh 2C (XT60) - Titan
Thanks
Interesting this. Are you saying the Mavic will happily operate on 16.8v???You do not need to change any parameters - just plug in and go. But if you want to read the battery voltage, you have to take the Mavic battery apart and remove the battery management board. Then you have to connect the 4s battery to the 3s control board . . and this is a bit tricky. Mavic batteries are a bit pricey and it's not difficult to blow up the battery or the control board. Then you have to find a way to connect the control board back to the Mavic, and a way to mount the batteries. This is not for the faint-hearted! If you still want to try it, go back a few pages in this thread and see how I did it . .
Interesting this. Are you saying the Mavic will happily operate on 16.8v???
I have heard that before. But if you don't do what he is saying, and just use these external batteries along side the stock internal, when you plug them in, the internal battery will start charging and then shut off. I haven't tried this but that's my understanding. Also heard that it flies pretty aggressively with 4s batteries
I'm not sure what procedure you are using to start up with the externals but I do the following:
Turn on the Mavic with the internal battery, externals unplugged.
Let it get GPS lock and then plug in the internals and start the motors.
Wait a few seconds to see if the lights on the internals start flashing, indicating that it is charging.
If it's charging, wait till it turns off and then turn it back on. Otherwise, take off and hover.
Once you take off, keep an eye on your voltage/percentage. If it doesn't start dropping after a bit, it probably shut off and you should bring it back in.
Yeah, the app only shows the internal battery voltage. If you use externals that track pretty closely to the internals as far as discharge rate and capacity, like the Protek 3600, the battery percentage/voltage shown in the app is still a good indicator as to how much is left in the tank. I haven't flown with externals that don't track that close to the internals yet but I have some on the way. In anticipation of that, made some adjustments to the Mavic parameters such that it will not try to force a landing when the internal gets low.
If you want to know how the battery behaves, just run it till the Mavic internal gets low and then charge your externals. You can see how many amps they take to recharge and thus gauge how close they track to the internal.
As to your last question, obviously the more weight, the more energy spent to keep it in the air. You will notice your RPMS will be higher when hovering once you have external batteries mounted. This extra load can cause the motors to get hot but most people don't have issues with it. I've only flown with 2 externals that weigh 440g total. Some are flying with 660g extra weight but I hear that's about as much as you're going to want to load it with.
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