Alright guys I've had about enough of my HDO2s beeping at me after running not more than 20 minutes. I'm beginning to think its the SYK Kable from tbs thats causing an even further dip in the voltage. Has anyone else had this experience? For power to the goggles ive been using a pulse 2s rx lipo 2000MAH, the classic 18650 fs case and the GNB 3000MAH (one at a time of course) connected to the SYK Kable and it never fails that ill get maybe 3 packs in before my goggles start to whine for low voltage. I hate having the lipo strapped to my head which is why I use the kables but I'm getting to the point where I may just sell these HDO2s and look for some 04Xs if this keeps up.


Can anyone help or add some suggestions?

I used to fly my HDO2's through a IRC PowerPlay DVR (with upgraded 18500 cells) but I would get low battery alarms in an hour of flying and at times the goggles would just shut down.

Now I fly them on a 2s 1800mah lipo pack (in my pocket) connected via a cable I made myself and I can fly for almost 2 hours (an hour on Saturday and an hours on Sunday) and then I put the lipo back on storage charge till the next weekend with good weather comes.

If you take a chance this once and connect the FS 18650 case directly yo to your goggles, how much flying time do you get out of the goggles?

I built all my li-ion packs for my HDO. I do use good Panasonic 18650. I can got multi-sessions without the goggles beeping. It only beeps when the battery indicator goes to one bar.

(03-Jun-2021, 02:07 AM)kafie1980 Wrote: I used to fly my HDO2's through a IRC PowerPlay DVR (with upgraded 18500 cells) but I would get low battery alarms in an hour of flying and at times the goggles would just shut down.

Now I fly them on a 2s 1800mah lipo pack (in my pocket) connected via a cable I made myself and I can fly for almost 2 hours (an hour on Saturday and an hours on Sunday) and then I put the lipo back on storage charge till the next weekend with good weather comes.

If you take a chance this once and connect the FS 18650 case directly yo to your goggles, how much flying time do you get out of the goggles?

Well w the 18650 pack I usually only get around 8 packs through my mobula7 (23 300mah) so around maybe 30 minutes of flying then it'll start to beep. But if I plug the lipo directly into the goggles it seems to go away, atleast for awhile.

For instance, I charged my 2s GNB 3000mah pack last night and went to fly this afternoon. I had it plugged into the syk kable and halfway through the first pack it already started beeping.

I do notice a SIGNIFICANT difference of flight time when the dvr is set to run continuously vs manually pressing the record button.

I found someone had posted this on RCGroups: https://www.rcgroups.com/forums/showpost...count=3557

Quote from that post:

"FYI this cable is regulated at 7.4 V. If you use a battery from 2S to 6S the voltage will be max at 7.4 V. If the battery is a 2S and it goes below 7.4 V the regulator won't step it up, and the goggles will alarm at 6.8 V or so. Therefore I recommend using this with a 3S or higher!"

(03-Jun-2021, 02:23 PM)kafie1980 Wrote: I found someone had posted this on RCGroups: https://www.rcgroups.com/forums/showpost...count=3557

Quote from that post:

"FYI this cable is regulated at 7.4 V. If you use a battery from 2S to 6S the voltage will be max at 7.4 V. If the battery is a 2S and it goes below 7.4 V the regulator won't step it up, and the goggles will alarm at 6.8 V or so. Therefore I recommend using this with a 3S or higher!"

This is the first time I've heard that the kable is regulated. I thought it was just a pass through. I really don't want to fry my HDO2s by plugging in a 4s. Guess ill have to do some digging.

(03-Jun-2021, 05:56 PM)AtomicAJ26 Wrote: This is the first time I've heard that the kable is regulated. I thought it was just a pass through. I really don't want to fry my HDO2s by plugging in a 4s. Guess ill have to do some digging.

There's an easy way to test this. Make sure the barrel connector is unplugged from your goggles, then plug in a 4S LiPo into the SYK cable, then use a multimeter to measure what voltage is being output at the barrel connector.

Looking at the TBS listing for the product, the Syk Kable accepts 2S-6S voltage input and which indicates that the cable is regulated else several people would be frying their goggles.

You could just plug in a 3S with the Syk Kable and call it a day since most goggles including the HDO2’s can handle 3s.

(03-Jun-2021, 11:18 PM)kafie1980 Wrote: Looking at the TBS listing for the product, the Syk Kable accepts 2S-6S voltage input and which indicates that the cable is regulated else several people would be frying their goggles.

You could just plug in a 3S with the Syk Kable and call it a day since most goggles including the HDO2’s can handle 3s.

Yes thats true but I do not currently have any 3s lipos. Your thought process makes sense but a little clarity from the manufacturer under the specs would clear it up alot. I see a few sites mention it being regulated however the TBS site says nothing.

(03-Jun-2021, 06:12 PM)SnowLeopardFPV Wrote: There's an easy way to test this. Make sure the barrel connector is unplugged from your goggles, then plug in a 4S LiPo into the SYK cable, then use a multimeter to measure what voltage is being output at the barrel connector.

Very true but didn't think I had a working multimeter but managed to find a working one and tested it myself. I checked my 4s lipo which read out 14 and some change volts and then tried it w the SYK Kable and CAN CONFIRM that it puts out 8 volts regulated. So we are safe to use up to 6s w the TBS SYK Kable on our FS goggles. Thanks for the help guys! Consider this topic closed!