Welcome DJI Spark Pilot!
Jump in and join our free Spark community today!
Sign up

iPhone 6 battery drain

canaanbill

New Member
Join
Jul 5, 2017
Messages
3
Age
72
Anyone else seeing this? Couple of Spark flights and my iPhone 6 is pretty much sucked dry. Seems there are reports that older apps didn't do this with older iPhones. What's happening?
 

el cap

Member
Join
Jun 7, 2017
Messages
13
Loc
kailua kona
I have iPhone 6 as well. Two batteries worth of flight time and I'd drain almost 70 percent of my battery. My phone is over 2 years old (almost 3 years) and works fine otherwise. Just think it's an old battery. Upgraded to iPad mini 4 last week (wifi only) and two batteries of flight drained 7 percent of the battery! Good luck, but I'd consider upgrading the mobile device for your RC.
 

Alex_Tijero

Member
Join
May 30, 2017
Messages
21
Age
36
First flight with OTG and same issue but then the next ones with same configuration didnt dry that much my iphone 6s battery, keep trying and no worries
 

canaanbill

New Member
Join
Jul 5, 2017
Messages
3
Age
72
Ordered a refurb mini 4 this morning. Will dedicate it to the Spark, or whatever I buy after that. Thanks for the feedback.
 

Stone

New Member
Join
Jul 6, 2017
Messages
1
Age
44
I have an iPhone 7+ and I'm seeing the same exact thing. Big battery drain after just a couple flights.
 

briri

Member
Join
Jun 15, 2017
Messages
13
Age
55
DJI Go4 is a huge battery sucker... Not so noticeable on P3/4 where the controller charges your phone when connected.
 

Dronason

Well-Known Member
Premium Pilot
Join
Jun 28, 2017
Messages
1,136
Loc
Switzerland
GO app draw battery, that's clear. But if you use OTG cable between phone/tab and RC, where you insert the "OTG" adapter has an big effect on power supply. Thepower supply will be connected together (tab and RC) by the cable. The side with the OTG cable will become the host and will try to charge the device on the other side of the cable.

Measuring the current in the USB cable give for me:
1) Samsung S6 phone with OTG adapter, RC with normal USB cable, current is 1.0 A, yes 1A
2) Samsung S6 phone with normal USB cable, RC with OTG adapter, current is 0.17 A

So you can guess which way I am using now, 2).
I tried also the 2) configuration with a iPad Mini4 and got 0.10 A. Didn't want to try the opposite way.

The phone/tablet is made to power with high current a USB device where the RC can only deliver small current to an external device. The RC can run 2.5 h so at 0.17 A at 5V it is about 2 Wh. The battery in the RC is 3.7 V rated 3 Ah, so it has 11 Wh.
So we are talking of a reduction 20%. So we can expect a run time of the RC of at least 2h. This is more than 4 flights using the battery in full. For all the benefit of the cable connection, it is not a problem IMO.

For the case 1), your RC battery will be nicely charged by the phone/tablet but then your phone battery will go down quickly. In my case of S6, it is 3.7 V 2.5 Ah = 9 Wh, having 1A at 5V on USB, it would be 5 W, so it will have huge impact on the phone autonomy. At some point, the RC will be fully charged but the RC need about 4.4 W, so even with RC charged, there will be still a high current I would guess (didn't want to test and stress my phone/RC for the sake of verifying a theory).
 

New Threads

Members online

Forum statistics

Threads
12,277
Messages
103,043
Members
16,042
Latest member
Ricky Dee