Received the x4 7000mah lipo. Could not charge cell no1 above 3.75v , returned to Amazon for exchange. Pretty crappy for a €63 lipo.
Great Amazon service as always.
That sucks! Well have them send another. Just bad luck probably.
Received the x4 7000mah lipo. Could not charge cell no1 above 3.75v , returned to Amazon for exchange. Pretty crappy for a €63 lipo.
Great Amazon service as always.
Received the x4 7000mah lipo. Could not charge cell no1 above 3.75v , returned to Amazon for exchange. Pretty crappy for a €63 lipo.
Great Amazon service as always.
It is still a lipo but pretty light for its capacity. The idea was to test it against double 3000 MS and a MS 3000+4000 combo. Would be a good everyday long-range deal if it outperforms double 3000 MS. I cannot rest until i ve tried this one.By the way, interesting battery. It could be combined with a multistar 3000 for some serious capacity! Might need to lighten mavic slightly as it would be just a touch heavier than dual 4000 multistar, but you have way more capacity. I'm sure DirtyBum will overpack it as well. Heck, it may reach 8000mah on it's own with overpacking.
It is still a lipo but pretty light for its capacity. The idea was to test it against double 3000 MS and a MS 3000+4000 combo. Would be a good everyday long-range deal if it outperforms double 3000 MS. I cannot rest until i ve tried this one.
Info session:
Did a maiden flight with The Ugly today. Freshly hardwired, no issues before that.
I decided the first flight without external to test normal functioning. Parameters set for 53 kph max full stick in p mode. Wind was moderate. Flying oval pattern,1.5km legs. Crosswind on the straight legs out/inbound.
Issues started with the turn after outbound leg into the wind. With the 180 almost halfway got "compass error" and "exit gps". (Mind i had checked the sensors state during preflight, all greens and little deviation, all good.)
The Ugly started drifting heavily and i was not sure if i was controlling it. The nose pointed to homepoint with full throttle and still drifting with the wind. Made a 45 deg crosswind correction, still drifting the wrong way. The wind was not high enough to do this, almost seemed controls were not corresponding to stick input. Brought it back safely and after restart of motors it reacted normal until i did the same. Making the turn into tailwind gave no issues.
Decided to calibrate compass during this session and that solved it. I have no idea why the compass got messed up yet still indicated all good.
Next flight i loaded it with the double 3000. Flew it 32 mins in an inefficient pattern until 5%.
Like all modded birds with top-loading: got compass error when tilt became maximum into the wind. Pretty sure the external cables on the rear end or battery overhanging compass2 interfere. 3 different birds, same thing, with higher headwind, always no2 compass. This has zero effect on functioning since no1 is in charge but gives reduced redundancy.
More weirdness: Finally after landing the main battery was 3.55v, 3.35v, 3,55v.
Externals were: 3.48, 3.60, 3.50..
I find the no1 and no3 readouts acceptable.
The no2 cells being opposite puzzle me.
I need help understanding this, never happened before!
Still have to pull the data from the moverio when home.
The batteries were charged evenly and voltage confirmed by multimeter. Also after flight. The packs are plugged in parallel to the mavic, i use a single mod.You see this issue on BOTH externals? This is likely a problem with the charger voltage meter. If it were 1 of the batteries, I'd say battery issue, but across both packs, must be charger meter. Use a multimeter to check the cells. The mavic battery mod has nothing to do with individual cell voltages as you are not using the balance lead. The XT60 connector is wired in series across the 3 cells and there's nothing the Mavic draw would do to unbalance those cells.
Edit: I should add, the charger may be bad. You may have charged the cells unevenly. So if you find that multimeter shows the same unbalanced result. Charge the packs and check with mutlimeter again across balance lead pins.
The batteries were charged evenly and voltage confirmed by multimeter. Also after flight. The packs are plugged in parallel to the mavic, i use a single mod.
What threw me off also the main pack, middle cell way lower than the others opposite to the external where the middle cell was way higher..
What are you planning to do with the stripped down stock batteries? What it's the weight off a stock battery fully cased?
Stock battery as light as it gets. I just did two here and one is 7g heavier than the other. I wonder if that translates to 3.7% more capacity as well?
Me too I fly with a stripped dji battery the original one is 246-250 gr taking away 50 gr you can obtain 1-1.5 min more , I also take away other part from Mavic even if they are onlu 3-5 gr less I made because better to take away gr than add to have more timeWhat are you planning to do with the stripped down stock batteries? What it's the weight off a stock battery fully cased?
Please can you post some photos of your stripped down battery set up off and on the AC?Me too I fly with a stripped dji battery the original one is 246-250 gr taking away 50 gr you can obtain 1-1.5 min more , I also take away other part from Mavic even if they are onlu 3-5 gr less I made because better to take away gr than add to have more time
Thanx for the information. One more question how much does the circuit board weigh on its own?
Stock battery as light as it gets. I just did two here and one is 7g heavier than the other. I wonder if that translates to 3.7% more capacity as well?
Fly them. The upper shell is 20g, lower 8.2g and 4g for the black peel off covering. Add back 2g for mounting and it's an easy 30g off. This stock Mavic with Platinum props started at 732g so 4.1% is a nice improvement.What are you planning to do with the stripped down stock batteries? What it's the weight off a stock battery fully cased?
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