I couldn't figure out how to calculate charge times...what kind of time difference to charge are we talking for a 6600mAh?
Battery Mod Info
- Thread starter damoncooper
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It's very simple math, voltage*amps=watts. So if you have 3S (12.6V) battery with capacity of 10000Mah, you'll need 120W of power to charge it for 1 hour or at 1C rate.
V*A=W
12.6V*10A=126W
For 6S battery the voltage is 25.2 and if the battery capacity is 6600Mah, then
25.2V*6.6A=166W
With 80W charger this could take about 2 hours, with 166W charger it will take 1 hour.
Hope that clear the things a bit.
Gotcha. I might get the D100 just so I can do two at once for convenience.
Actually, I might give this a try, it seems smaller/lighter than the D100 but twice the power: Turnigy Neutron 200W DC Touch Screen Balance Charger LiHV Capable (but no power supply).
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Not well rated on HK site but the price is really nice and if the specs are right it can charge one 6S 8000Mah battery for one hour or 6600Mah charged at 8A will be full for less than hour. That sounds better than D100, actually the D100 can do 200W but only with additional DC power supply, but with that price the Neutron is the winner.
I just re-ordered the multistar 6600 liHV batts since emtea mentioned they are back in stock. Hopefully this time I don't get an email that they are out of stock again. I too was looking for a good LiHV charger. I couldn't believe the sale HobbyKing was having on this Turnigy
TURNIGY MEGA 1344W / 40A Balance Charger / Discharger
It's just a re-badged Powerlab charger. I'm an old r/c guy and I never had chargers that had internal power supplies. They were always too slow for me since the power supply they could squeeze into the charger was never going to be powerful. Most chargers on the market are going to be fine, but 6S batteries are another animal. Like Niki mentioned, its easy math, but the high voltage of 6S really chews into the available amps when dealing with a 50-100W charger. Also note that most of the chargers that have internal power supplies can charge at faster rates when using an external power supply. Anyways, I couldn't believe the power output of the Turnigy Mega 1344W.... and with the price drop to $74, it was too good of price to pass up. It only has one charging port, but that is easily taken care of with a parallel charging board. I still have my old Venom medion with two charging ports for any other types of batteries I need to charge.
I use a 1000W power supply for all of my charging needs. I built my own charger for the Inspire 1 batteries using my 1000W power supply. I then made an output with banana connectors to plug in standard hobby chargers so that I'm not lugging around a spare power supply just for the standard charger.
TURNIGY MEGA 1344W / 40A Balance Charger / Discharger
It's just a re-badged Powerlab charger. I'm an old r/c guy and I never had chargers that had internal power supplies. They were always too slow for me since the power supply they could squeeze into the charger was never going to be powerful. Most chargers on the market are going to be fine, but 6S batteries are another animal. Like Niki mentioned, its easy math, but the high voltage of 6S really chews into the available amps when dealing with a 50-100W charger. Also note that most of the chargers that have internal power supplies can charge at faster rates when using an external power supply. Anyways, I couldn't believe the power output of the Turnigy Mega 1344W.... and with the price drop to $74, it was too good of price to pass up. It only has one charging port, but that is easily taken care of with a parallel charging board. I still have my old Venom medion with two charging ports for any other types of batteries I need to charge.
I use a 1000W power supply for all of my charging needs. I built my own charger for the Inspire 1 batteries using my 1000W power supply. I then made an output with banana connectors to plug in standard hobby chargers so that I'm not lugging around a spare power supply just for the standard charger.
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I use a Powerlab8 which has never let me down.
I'm guessing the Turnegy is a rip off of the Powerlab8.
Revolectrix
Yeah it's definitely not super compact but it works great so far !!
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Let me pick all the gurus brains. The tb48 I used for my first battery mod was messed up from day 1 DOA after first charge, something went bad on the "smart board" so it sat charged for approx 2-3 weeks which I know is bad but had to wait on my D100 to make it here.
Now, with that in mind. I put a new board in that battery and it's back in action & now modded for aux batteries.
On my first test everything went well !! 2x2200mah 6s lipos in parallel but I noticed my main tb48 was way out of balance when I landed @ 7% - 26min flight.
Now is this a bad battery ? Or just part of the deal when running aux batteries ?
Anything to worry about ??
(Ps the aux were also @ 7% after landing)
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Now, with that in mind. I put a new board in that battery and it's back in action & now modded for aux batteries.
On my first test everything went well !! 2x2200mah 6s lipos in parallel but I noticed my main tb48 was way out of balance when I landed @ 7% - 26min flight.
Now is this a bad battery ? Or just part of the deal when running aux batteries ?
Anything to worry about ??
(Ps the aux were also @ 7% after landing)
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I wouldn't worry about it at this moment, but it is good that you are paying attention to the cells. You first mentioned that you had left it fully charged for awhile and you drained it to 7% during your flight. I wouldn't be surprised by the results you are seeing (regardless of carrying an auxillary battery). 7% is pretty low and that is where you'll start seeing the small discrepancies in cell quality in a pack. I also wouldn't consider a 0.21V range wildly out of balance at 7% remaining. My guess is that you'll see a more balanced result over the next few cycles of the battery. If not, its always good to be paying attention and if for some reason that first cell really starts to increase its difference from the others, it'll be time to retire the pack. Also, does the first cell charge to the same voltage level as the rest of them?
For now, I'd say you are good to go.
Thanks man !! I think it may just be a messed up battery. It doesn't charge balanced either .. Cell one stays a hair low. I think I'm going to run it right down and charge it a few times, see what happens. I'm not worrying about it too much. When the rest of the materials I ordered come in I'm going to do the bird side mod.
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I have found the aircraft mod is more time consuming, but at least it is only done one time. I much prefer it to doing the batteries.
I hear ya, I'm just looking at it from the perspective of, once it's done, it's done. I can use any battery with it, and attaching batteries is going to be more streamlined, etc. and it looks more OEM as well.
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True, and that's why I did it. I only had to do it once, the wires are completely out of the way of the blades, I can use any battery with it, etc... It's just amazing how much needs to be disassembled to get to the right spot! If you haven't seen it, I posted some pictures a few pages back where I've done the soldering. I recently crashed and needed to take it apart anyway to replace the damaged parts, so I went the extra step to go all the way back to the circuit board to take some pictures. I'm not sure how everyone else is doing it, but I found the cleanest install was to run the auxillary battery wires right through the holes used by motor wires, then out the wire hole in the bottom where the sonar module used to be (in my opinion). If you still use the sonar module, the auxillary battery wires can simply exit out the side of the bottom chassis plate.
Yup those photos are what inspired me to do it that way !!
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Damon, how you charging the TB48 battery with TP820HVC, there is no balance plague, no problem with the mod cable for the cornet feeding, but how goes with the balance?
Thanks in advance
I charge the TB batteries with the DJI (traveling) or Smart Powercharge charger (home).
No balance leads, as you say. The TP LiHV charger also requires some trickery to charge non-TP LiHV batteries to LiHV levels (i.e. The Multistar LiHV 5200).
Let me know if you need that info
Wow. Great increase in flight time when I changed over to the Multistar 6600 LiHV batteries. 29 minutes to 14%. I'll take it! That was with an X3 camera as I'm still waiting for my X5 to return to me, but my guess is that the X5 will be around 25 to 26 minutes. Again, I don't do any hover tests. I just go out and fly my normal way. The Multistars are a hair bigger than the Lectron 5400 Lipos I've been using. I'll have to weigh them both. No big deal to mount it up in the same way that I was doing before. Even better, they are only $60 each (leave the page open for a few minutes and the $60 deal comes up). Definitely a lot better than the $95 price I've been paying for the Lectron Lipos. I figure there are still better options out there to get more flight time, but I'm very impressed with the bang for the buck you get out of the 6600 LiHVs from Multistar.
In addition, it allowed me to try out the Turnegy Mega 1344W. This charger is surprisingly small. I was expecting something a lot bigger considering the amps and watts it can put out (assuming you have a power supply capable of maxing out this charger). It only has one output, but considering my main use for it will be the LiHVs for my Inspire, that's not a concern. I simply hooked up a parallel charging board to it and all was well. The charger can supposedly pump out 40 amp, but I don't have anything to test that on (or at least, I don't think I do). The Multistars did not come with a charging rate that they can handle so I only slightly went above 1C (around 15 amp) since both multistars in parallel would be 13200mah. The charger handled that with no problems at all and I didn't feel any heat buildup. Are the electronics in it the same as the Powerlab? Don't know, but I don't really care either if it can keep performing at this level. I'm getting both of my Multistars charged up in 1 hour or less and that is good enough for me. Of course if I get 2 more to plug into the parallel charging board, it will need to bump up to 30 amp or so. I'll see if the charger can handle that when the time comes. All in all, I'm super impressed considering this charger only costs $74! That is a steal considering there are not a ton of choices out there right now for an LiHV charger.
Here is my current charging setup. I built my own charger for the Inspire batteries. I use a 1000watt power supply and have made 3 charging bays although I do have room for a 4th. I'm sure one of these days I'll make one more bay, but considering I also connect my Turnegy LiHV charger to it as well, that's a lot of power output. Works out pretty well getting my Inspire batteries and LiHV batteries charging at the same time while only needing the one power supply to do both.
In addition, it allowed me to try out the Turnegy Mega 1344W. This charger is surprisingly small. I was expecting something a lot bigger considering the amps and watts it can put out (assuming you have a power supply capable of maxing out this charger). It only has one output, but considering my main use for it will be the LiHVs for my Inspire, that's not a concern. I simply hooked up a parallel charging board to it and all was well. The charger can supposedly pump out 40 amp, but I don't have anything to test that on (or at least, I don't think I do). The Multistars did not come with a charging rate that they can handle so I only slightly went above 1C (around 15 amp) since both multistars in parallel would be 13200mah. The charger handled that with no problems at all and I didn't feel any heat buildup. Are the electronics in it the same as the Powerlab? Don't know, but I don't really care either if it can keep performing at this level. I'm getting both of my Multistars charged up in 1 hour or less and that is good enough for me. Of course if I get 2 more to plug into the parallel charging board, it will need to bump up to 30 amp or so. I'll see if the charger can handle that when the time comes. All in all, I'm super impressed considering this charger only costs $74! That is a steal considering there are not a ton of choices out there right now for an LiHV charger.
Here is my current charging setup. I built my own charger for the Inspire batteries. I use a 1000watt power supply and have made 3 charging bays although I do have room for a 4th. I'm sure one of these days I'll make one more bay, but considering I also connect my Turnegy LiHV charger to it as well, that's a lot of power output. Works out pretty well getting my Inspire batteries and LiHV batteries charging at the same time while only needing the one power supply to do both.
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