Taranis QX7 battery options? - RC Groups
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Mar 16, 2017, 03:17 AM
Registered User
Question

Taranis QX7 battery options?


Hi all

I've just got a Taranis QX7.

Can I plug a 2S battery balance lead directly into the battery pack socket?

Thanks.
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Mar 16, 2017, 07:08 AM
AKA 8178 - MIke Dailey
Jet_Flyer's Avatar
Quote:
Originally Posted by Axle Jack
Hi all

I've just got a Taranis QX7.

Can I plug a 2S battery balance lead directly into the battery pack socket?

Thanks.
Take a look at the index in the first few posts in the main Q X7 thread. Lots of battery options listed there https://www.rcgroups.com/forums/show...featured-radio

Mike
Mar 16, 2017, 10:38 AM
S.A.D. member
ivanc's Avatar
Quote:
Originally Posted by Axle Jack
Hi all

I've just got a Taranis QX7.

Can I plug a 2S battery balance lead directly into the battery pack socket?

Thanks.
Without sending you to other pages, links, etc. which is typical for the OpenTX/Er9X/ErSky "gurus":

The answer to your question is YES.

Ivan
Mar 16, 2017, 03:00 PM
Registered User
Thanks Ivan.

I appreciate the help, and not having to read 177 pages of posts to get it
May 29, 2017, 07:22 PM
Krotow

Taranis Q X7 with LiPo battery


No problems at all with any 2S or 3S LiPo battery which can squeeze into QX7 battery bay with possibility to close cover over it. You may connect 2S batteries directly to battery connector in QX7 battery bay through balance connector. For 3S batteries you should create a connector cable before from battery connector (XT-60, XT-30, 3S JST-XH balance male connector etc.) to 2S JST-XH balance female connector. In QX7 connector both side pins are used. Middle pin isn't connected to anything. Mind polarity though. In QX7 menu adjust battery voltage range for 2S (6.8-8.4V) or 3S (10.2-12.6V). That is all. More - if you are flying something on 2S/3S batteries which have compatible dimensions, you can use them in QX7 in field if main battery goes empty.

Did a successful conversion of my Taranis Q X7 to 2600 mAh 2S LiPo at yesterday. It fit in bay exactly in length and height and works as expected. Connected directly through 2S balance connector. Those NiMH AA-s at left now can return into X6 transmitter from where I borrowed them.

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May 30, 2017, 12:40 AM
Registered User
Quote:
Originally Posted by Axle Jack
Thanks Ivan.

I appreciate the help, and not having to read 177 pages of posts to get it
You don't. You only have to look at the first few posts. Davos has done a lot of work linking relavent posts and even writing a decent basic manual. Ivanc is just being snotty. People get weary of answering the same question over and over and that is not an exclusive trait of open tx people.

So even though your immediate question was answered you should take a look at that thread. Usually you will get a faster response to qustions there too.
May 30, 2017, 12:41 AM
Registered User
Quote:
Originally Posted by Axle Jack
Thanks Ivan.

I appreciate the help, and not having to read 177 pages of posts to get it

Amen...
May 30, 2017, 07:11 PM
Registered User
Quote:
Originally Posted by pressalltheknobs
you don't. You only have to look at the first few posts. Davos has done a lot of work linking relevant posts and even writing a decent basic manual....people get weary of answering the same question over and over and that is not an exclusive trait of open tx people.
....
amen!
Jun 18, 2017, 01:47 PM
Registered User
Another battery option for DIYers.

$6 Taranis QX 7 DIY Battery Pack* (27 min 49 sec)
Jun 21, 2017, 11:55 AM
Registered User
Cantaloupeman's Avatar
Quote:
Originally Posted by Krotow
No problems at all with any 2S or 3S LiPo battery which can squeeze into QX7 battery bay with possibility to close cover over it. You may connect 2S batteries directly to battery connector in QX7 battery bay through balance connector. For 3S batteries you should create a connector cable before from battery connector (XT-60, XT-30, 3S JST-XH balance male connector etc.) to 2S JST-XH balance female connector. In QX7 connector both side pins are used. Middle pin isn't connected to anything. Mind polarity though. In QX7 menu adjust battery voltage range for 2S (6.8-8.4V) or 3S (10.2-12.6V). That is all. More - if you are flying something on 2S/3S batteries which have compatible dimensions, you can use them in QX7 in field if main battery goes empty.

Did a successful conversion of my Taranis Q X7 to 2600 mAh 2S LiPo at yesterday. It fit in bay exactly in length and height and works as expected. Connected directly through 2S balance connector. Those NiMH AA-s at left now can return into X6 transmitter from where I borrowed them.

Attachment 10079147

Will this HK life battery fit in the qx7? The pic is attached and the dimensions are 102mm x 23mm x 28mm.
Jun 22, 2017, 10:00 AM
Krotow
Quote:
Originally Posted by Cantaloupeman
Will this HK life battery fit in the qx7? The pic is attached and the dimensions are 102mm x 23mm x 28mm.
You mean this battery?

https://hobbyking.com/en_us/hobbykin...tter-pack.html

I don't think that it can fit in QX7 battery bay which have 17mm height Batteries with height below 17mm need some fitting to not rattle battery inside bay. 17mm high ones fit in perfectly. 18mm - bay cover is already hard to close. Larger batteries will not fit at all. See in post about QX7 parameters:

Quote:
Battery compartment size: W: 92mm (remember that you have to fit wires there) x H: 57mm x D:15-18mm
If you’d have 15-16mm depth battery — it would fit perfectly. You can fit up to 18mm battery but the battery bay cover might rub against the battery and it would be harder to remove it. The bay cover gets easily removed if you’d press it a little bit inside to shift it from the holding openings in the shell… That is why 15 -17mm is preferred…
So use smaller battery - 2S TX packs are good for that too. Get ones with larger capacity. C number is not significant here. For example these

https://hobbyking.com/en_us/turnigy-...tter-pack.html
https://hobbyking.com/en_us/turnigy-...iver-pack.html
https://hobbyking.com/en_us/turnigy-...-and-3pks.html

Or do a query for 2-3S batteries with compatible sizes in HobbyKing LiPo finder.

https://hobbyking.com/en_us/lipo.htm...2&width_c=0-17

For 3S batteries use a connector adapter from one of battery connectors to 2S balance plug on QX7 mainboard. And check polarity twice before connecting.
Jul 10, 2017, 12:01 PM
Registered User
Can I use this battery? Is it safe or will it fry my TX?

Also, do I have to mod my QX7 to get it to fit?

I'm asking bc I have a couple at home from my old Laser 4 TX.

http://www.robotshop.com/en/hitec-54...FYSKswod06APDg

Sorry about reviving an old post...
Jul 10, 2017, 05:53 PM
Registered User
Quote:
Originally Posted by Imozeb
Can I use this battery? Is it safe or will it fry my TX?

Also, do I have to mod my QX7 to get it to fit?

I'm asking bc I have a couple at home from my old Laser 4 TX.

http://www.robotshop.com/en/hitec-54...FYSKswod06APDg

Sorry about reviving an old post...
no its the wrong shape...

Here are some examples of workable batteries.

NiMH is a sensible choice
http://alofthobbies.com/72v-2600-aa-...tter-pack.html

which allows you to add this...for convenience
http://alofthobbies.com/qx7-charger-kit.html#

or

if you have a lipo charger and you use your radio frequently so managing a lipo makes sense...

http://alofthobbies.com/3800-mah-lip...r-the-qx7.html
Jul 10, 2017, 06:34 PM
Registered User
Thanks.
Aug 03, 2017, 07:07 PM
Portuguese fast learner
I've bought a 2S LiFe from HK, couldn't go worst. The nominal voltage is 6.6 V but the minimum voltage for the radio is 6.0 V so you have very little range there. Besides my radio is always screaming "battery voltage low" when it isn't. Don't do like me and buy 2S LiFe to the QX7.


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