H906A transmitter operating voltage

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bradj013
Posts: 3
Joined: Thu May 24, 2018 12:40 pm

H906A transmitter operating voltage

Post by bradj013 » Sat Jun 30, 2018 8:46 pm

I have the H906A transmitter that I use with my H109S quad copter. I want to use high capacity NIMH batteries with the TX but I am concerned about the reduced nominal voltage that the NIMH batteries produce. Is there a known battery voltage at or below which the transmitter will begin to lose signal strength or range? Is there a known critical battery voltage at or below which the transmitter will shut down?

BushrangerRed2
Posts: 1
Joined: Sat Jun 30, 2018 5:13 am

Re: H906A transmitter operating voltage

Post by BushrangerRed2 » Fri Jul 06, 2018 3:54 am

Hi Brad,
I also have the H906A transmitter flying an H501A and I have only used normal alkaline batteries so far. I have found that it will operate no problems til it gets around 7.5 volts. The low voltage affect on range I cannot really answer as my max range so far is around the 500 Metre mark.
There's a beeper which begins in the controller when around 7.5 volts or slightly lower, but as I am within a close range it has not become a problem. The Transmitter has not shut down.... yet. ( I do head home asap when I hear the beeper go)
I have found that the transmitter does use a significant quantity of batteries per hours flown and I'm considering a similar act as yourself. (Does yours chew the batts too) I do not think the 1.2 volt of normal rechargeable battery would be a great problem unless your out at maximum range. (8 X 1.2 = 9.6 volts not 12)
I am considering an outer battery, for a number of reasons. The battery compartment security looks like something you see on a cheap short life device. Which I find disappointing and a bit weird when I inspect the rest of the device, which I find excellent quality. I suspect that range may be affected due to the lower voltage, but I'm not an electronics expert.
https://www.banggood.com/collection-5889.html?bid=28507?rmmds=category-top-bbanner#maodian_0
Lists many batteries for use in other applications, but of higher voltage (11.1 V) and much higher mAh. The connectors for these are available also, so some small modifications can be applied to allow fitment of your preferred battery externally. The only thing I have not found so far (only been checking it out for a day) is the appropriate charging device for such a battery.
I hope this gives info that helps mate.
Regards

Bryan D

bradj013
Posts: 3
Joined: Thu May 24, 2018 12:40 pm

Re: H906A transmitter operating voltage

Post by bradj013 » Sun Sep 02, 2018 10:22 am

Hey Bryan,

Looking through the manual, I noticed that Hubsan claims you could use a 2S-4S lipo to power the transmitter. That would indicate that it *should* be able to function on supply voltages as low as 7.4 volts. I bought a set of Panasonic Eneloop batteries for my transmitter. I found that they can run the TX for several hours without the voltage falling below 9v. I am going to consider a TX voltage of 8.5 as the cutoff voltage to leave some buffer for safety. If I have any specific challenges, I will update the forum, but I am happy with the NIMH batteries so far.

justjarhead
Posts: 334
Joined: Sat Jun 30, 2018 12:45 pm
Location: Elgin, IL USA

Re: H906A transmitter operating voltage

Post by justjarhead » Sun Sep 02, 2018 1:59 pm

The Hubsan 1300 mAh 7.4V 2c Lipo has been used or if you can find the 1400mAh Hubsan battery.

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magicmannst
Posts: 51
Joined: Mon Jul 30, 2018 2:06 pm
Location: Southern US

Re: H906A transmitter operating voltage

Post by magicmannst » Mon Sep 03, 2018 7:09 am

https://www.amazon.com/dp/B00USRD91W/?coliid=IE5KBI0EEKYES&colid=3D7QS4PTUTMZ9&psc=0&ref_=lv_ov_lig_dp_it


this is an 11.1v 2200 mah 1.5 c closer to what Hubsan originally sold for the H906A

philbur
Posts: 1
Joined: Mon Sep 03, 2018 11:57 pm

Re: H906A transmitter operating voltage

Post by philbur » Tue Sep 04, 2018 12:23 am

I went the route of using a 3s (11.1V 2200mah) LiPo.
It fits the battery bay (just barely, after I changed the cables to smaller diameter stuff).
You just need to hit a hobby store and bring your Tx to try what they have.

SO far I have about three HOURS on the Tx with a full cahrge and there has been ZERO voltage drop.

Hope this adds food for thought.

SomeGuy
Posts: 19
Joined: Wed Aug 01, 2018 6:53 pm

Re: H906A transmitter operating voltage

Post by SomeGuy » Tue Sep 04, 2018 12:42 am

I use one of these. Works great and takes forever to drop voltage.

https://www.ebay.com/itm/2600mAh-11-1V-Battery-Hubsan-transmitter-H109S-H501S-H502S-H301S-FPV1-H906A/162409959152?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

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