taranis battery

Hardware help and support for the FrSky Taranis

taranis battery

Postby gorsepig007 » Sun Sep 15, 2013 4:59 am

i have changed my tx battery to lipo and it works fine but wondering if that is the better choice or should i use liFe or just stick with origanal any thoughts?
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Re: taranis battery

Postby janekx » Sun Sep 15, 2013 10:32 am

I use life 1500mAh fits well and is safer then lipo...

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Re: taranis battery

Postby Romolo » Sun Sep 15, 2013 11:34 am

6 NiMh 2400mah LSD and I can charge them inside the radio without any mods...
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Re: taranis battery

Postby ShowMaster » Sun Sep 15, 2013 2:55 pm

Romolo wrote:6 NiMh 2400mah LSD and I can charge them inside the radio without any mods...

+1
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Re: taranis battery

Postby Daedalus66 » Sun Sep 15, 2013 4:44 pm

Another with six NiMH. I made a pack from Eneloop cells.
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Re: taranis battery

Postby wrenow » Sun Sep 15, 2013 8:12 pm

I understand, an Eneloop set with 6AAs will be sent out by FRSky soon. So the best options, IMHO, are to build a pack with 6 AA Eneloops yourself that match the format of the original, or wait a week or so and buy them already made when they become more widely available (unless you are near T-9, then buy now).

I am patient enough to wait until they are ready, and don't have the time and energy to roll my own right now.

Cheers,

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Re: taranis battery

Postby GeoffSleath » Sun Sep 15, 2013 10:15 pm

gorsepig007 wrote:i have changed my tx battery to lipo and it works fine but wondering if that is the better choice or should i use liFe or just stick with original any thoughts?


What LiPo? I got a 3S 2500 mAh LiPo from HK which fits easily in the battery bay but in the end I chickened out of using it and I've made up a 6 cell NiMh 'Instant' (similar to Eneloop) 2500 MAh pack with cells from Vapextech and that seems to working OK. My transmitter has had a lot of 'On' time during my learning phase and none as yet at the field, partly because I've been ill the last few days.

I've made an adapter lead from the JST to a male servo connector (I call them male but for some reason others call them female despite the fact they have pins :) ). I'll charge outside the transmitter using a decent fast charger (Graupner Ultramat 16) rather than trust the built in one after my recent travails :)

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Re: taranis battery

Postby gorsepig007 » Mon Sep 16, 2013 4:43 am

oh i got a 3s 2200 tx 8c from bang good just cut one of the three power choices end and resoldered on the nimh connector that came with nimh pack http//:youtu.be/j2btOoqZwYw[/BBvideo]look at dwexoticmaple YouTube you sholud see vid will try to post link tomorrow
Last edited by gorsepig007 on Mon Sep 16, 2013 11:40 am, edited 4 times in total.
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Re: taranis battery

Postby GeoffSleath » Mon Sep 16, 2013 9:51 am

Thanks. I was just wondering if you'd gone to a 2S LiPo. Unfortunately your video won't play for me and just returns the message that it's 'Private'. Didn't know there was an option fr YouTube videos to be private.

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Re: taranis battery

Postby gorsepig007 » Mon Sep 16, 2013 11:23 am

http://youtu.be/j2btOoqZwYw[/bbvideo] Sorry second link should work its public :D




O
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Re: taranis battery

Postby rcgyuk » Tue Sep 17, 2013 12:11 pm

I also went for a 3s 2200 lipo, and I set the low voltage warning to 9.3v, Given that the Tx should still be working at 6v, loosing a model from low battery in the Tx should never happen (I hope)
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Re: taranis battery

Postby Flaps 30 » Tue Sep 17, 2013 12:39 pm

rcgyuk wrote:I also went for a 3s 2200 lipo, and I set the low voltage warning to 9.3v

IMO If the alarm should ever go off at that setting, you may as well put the Lipo in the bin. That voltage is fine (well almost) if the battery was under a load of ten Amps or so, but that isn't the case with this TX. Personally I would aim at a minimum voltage alarm of eleven Volts.
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Re: taranis battery

Postby jhsa » Tue Sep 17, 2013 12:50 pm

well spotted Flaps30 ;)

For a 3 celll LiPo i would set the alarm at something like 10.5V. Some people even suggest a higher voltage like 11.1V as the tx takes very low current..

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taranis battery

Postby Daedalus66 » Tue Sep 17, 2013 2:52 pm

A voltage of 9.3 is FAR too low for a 3s LiPo. That may pretty much destroy the battery.

A resting voltage of 3.5 or 3.6 per cell is as low as it should go (10.5 or 10.8 for 3s). I would set it at 11.0, which corresponds to about 10% of capacity left.

Don't confuse resting voltage (which is essentially what we are dealing with in low drain situations like this) with voltage under heavy load (driving a motor). ESCs may be set at 3.0 or 3.2 per cell for LVC, but the voltage they are measuring can be depressed 0.5v under load.

By the way, the 6v number is irrelevant in such a situation. If you ever get down to 9.3v the battery will be on such a steep downward path that you will only have seconds left to land.

EDIT: Nice to see consensus :)
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Re: taranis battery

Postby Romolo » Tue Sep 17, 2013 5:54 pm

rcgyuk wrote:I also went for a 3s 2200 lipo, and I set the low voltage warning to 9.3v, Given that the Tx should still be working at 6v, loosing a model from low battery in the Tx should never happen (I hope)


Please have a look to this graph for 0.5 c:
discharge_curves_1.jpg


At 3.1v the battery is almost dead...the voltage drop vs capacity used is huge.
you are using the battery at 0.1C setting 9.3V is indeed too low.
a good point as already suggested is between 3.7 and 3.6V per cell.
11V is indeed a good suggestion, you will probably have 10% left, that means, at 200mA consumpion, 60 minutes of usage with your battery.
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Re: taranis battery

Postby rcgyuk » Tue Sep 17, 2013 8:10 pm

Thanks for all the info, you learn something new every day !!!
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Re: taranis battery

Postby Imho » Tue Sep 17, 2013 11:06 pm

This is the battery I bought for the Taranis: Turnigy 2650mAh 3S 1C LLF Tx Pack (Futaba/JR)
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Re: taranis battery

Postby gorsepig007 » Wed Sep 18, 2013 5:56 am

true i set mine at 11 too just to make sure
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Re: taranis battery

Postby gorsepig007 » Fri Sep 20, 2013 10:27 pm

hmmm after some research and advice im changing to liFe battery now only cause way less hassle and peace of mind cheers everyone
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