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Hitec Flash 8 Battery Life

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RC Plane Flyer11/07/2019 07:22:41
618 forum posts
22 photos

Hi all Hitec users. Having had to upgrade to Flash 8 after trouble free Flash 7 which had a unfortunate accident I am now troubled with short battery span. I estimate I am getting 45 mins flight times with different models where the 7 lasted a lot longer. I have the correct charger for the 8's battery LiFe 6.6v 1400Mah and shows 6.7v at full charge r ( the 7 was on 2000Mah eneloops ) after some 6 ic flights I am seeing 6.4v and this then drops rapidly over next two flights. I am searching for a new or replacement battery pack but nothing showing up as yet, so come here for any experience, advice

Frank Skilbeck11/07/2019 08:11:35
avatar
4424 forum posts
101 photos

A full charged 2s liFe battery should be 7.2v, can you charge the battery out of the Tx and check the fully charged voltage.

Glenn Stevenson11/07/2019 08:37:49
36 forum posts
2 photos

Hi, check in the management settings that the battery is set to Life.

Maybe thats wrong

Glenn

RC Plane Flyer11/07/2019 08:57:51
618 forum posts
22 photos

Hi respondents. I do charge the battery out of the TX but only shows 6.7 v on screen maybe need to do further checks on charger settings. The Tx is factory settings to Life battery and that's why I get low battery warning

Thanks for replies so far

iqon11/07/2019 09:27:15
avatar
1444 forum posts
239 photos

Mine showing 6.7v, never seen low battery warning. Lasts ages

Glenn Stevenson11/07/2019 11:07:05
36 forum posts
2 photos

I charge mine in the tx, stays charged for ages

I usually top up after a days flying though, just in case

Shame the beeper isnt louder though.

Glenn

RC Plane Flyer11/07/2019 11:57:27
618 forum posts
22 photos

Hi Iqon & Glenn just out of interest which charge system are you using to charge the Life battery.

Multi purpose charger or the Hitec charger

I have reduced the backlite timer down to 20 secs from 30 secs and not using the dc output for anything

contrast down to 30%

Just sent an e mail to service dept in America see what happens

Glenn Stevenson11/07/2019 12:02:21
36 forum posts
2 photos

I use the charger it came with, not turned backlight down or contrast. Voltage stays at 6.7 volts as long as I need.

Try another battery.

Glenn

RC Plane Flyer11/07/2019 12:13:50
618 forum posts
22 photos

Hi Glenn thats the problem with another battery Hens teeth is what i am looking for until early august

Had a look in the battery bay and not much else will fit in

Glenn Stevenson11/07/2019 12:34:54
36 forum posts
2 photos

Hobbyking sell a 2100 life 2 cell transmitter pack that I use for receiver in planes that could be used if a bit of the tx case was trimmed a bit, a seller on ebay has hitec batteries for £30 but postage from germany is £14.30

Glenn

Glenn Stevenson11/07/2019 12:49:50
36 forum posts
2 photos

Have a look at this, it should fit

**LINK**

Glenn

iqon11/07/2019 12:50:45
avatar
1444 forum posts
239 photos
Posted by RC Plane Flyer on 11/07/2019 11:57:27:

Hi Iqon & Glenn just out of interest which charge system are you using to charge the Life battery.

Multi purpose charger or the Hitec charger

Hitec charger that came with TX.

RC Plane Flyer11/07/2019 13:13:01
618 forum posts
22 photos

Hi Glenn did have a look at that earlier but did not double check battery chamber just checked and it should be a goer. Will wait to see if Hitec America get back to me.

alan p11/07/2019 14:43:51
219 forum posts
3 photos

Hi Glenn

Just charged tx battery on multi charger after discharging, showed full charge 7.0. back in tx screen showed 6.9.

Mine usually shows min 6.8 using supplied charger, and holds charge well, just make sure if it needs a top up if required.

John Tee11/07/2019 14:49:55
756 forum posts
65 photos

As a coincidence I have just bought one of these Tx's and it didn't work when I turned it on. The charger (Hitec supplied) was giving out 9 volts, the battery 0 volts. Charged the battery for the stated 8 hours and with all the playing about I have done with various settings and model setup's still shows 6.7 volts. Was a bit concerned at the lack of volts but seems to be holding up now. Time will tell. Never used Life batts. before.

John

RC Plane Flyer13/07/2019 09:07:52
618 forum posts
22 photos

Quick up date or is it a bump? America did not provide an answer and directed me to English agent still waiting for a reply from them. Looking at the option to get a Hitec charger that's another hens teeth problem. Looked at my current charging regieme and the charger auto shuts down after 2 hrs . So after mods to that and a charge for 4 hours I could see over 400 MaH input and the battery on screen showing 6.8 v.

Looks like I may be getting there

RC Plane Flyer15/07/2019 19:27:45
618 forum posts
22 photos

Last update for now I am led to believe that the Tx has an inbuilt Life charging PCB installed and that it only needs a 9/12 volt dc supply so its left to chance how many MaH go into the battery. I have had some responce from two suppliers re an alternative power pack supply but no responce from English Agent so I am going to charge my battery on a modern charger so I can see how many MaH have been input . I have seen over my last two charges over 600 MaH in put and a cut of voltage 7.2 v. So pen an paper in the Tx box to jot down flight times and see how we go from there

Happy Flying to all

robert chamberlain18/07/2019 08:54:58
117 forum posts

I have a Hitec Optima 6 Sport which has a low trans voltage warning but only for NiCad and NiMh. To use a LiFe I need to program it to accept this. The instructions say I need some kind of equipment, possibly to go through a computer. I can not find any reference to this anywhere. Does anyone know about this?---Thanks--Bob

RC Plane Flyer18/07/2019 15:25:36
618 forum posts
22 photos

Hi Bob. It's a long time since my Optic 6 but I am unable to remember if I every saw Life batteries being mentioned. Maybe à call to something like Airtekk Hobbies or Steve Webb to chat with someone. It sounds like an on line update maybe required Good Luck

Denis Watkins18/07/2019 16:12:40
3746 forum posts
179 photos

Do you know Bob, a good Nimh will last you years

You will have no concerns about programming your tranny

And your consumption is around 300mah, 300 milliamps in an hour

Overlander always served me well

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