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Author Topic: How to measure one cell lipo with a GT Powr Battery Controller/Checker?  (Read 677 times)

Offline Two-Six

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I have one of these:
https://www.banggood.com/GT-Power-Capacity-Lipo-Battery-Tester-With-Balance-Function-For-RC-Models-p-989621.html?cur_warehouse=CN

I want to be able to make a little lead/adapter to measure the voltage of a one cell lipo using this thing but I can't make it work. 

I am not sure which connectors to use.  I am also not sure if it will work at all with just one cell.

Any suggestions as to how I should hook up the battery or as to why it doesn't work?
Nighthawk Pro, Trex 450 L Dominator 6 cell *FLOWN*, Blade 450-3D, MCPX-BL, MCPX-V2, Hubsan X4, Seagull Boomerang IC .40 trainer, HK Bixler, AXN Clouds fly,, Spektrum DX7, Taranis, AccuRC

Offline Bad Raven

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Don't know that SPECIFIC checker, but many (if not most) will not work on only 3.?? (used battery) supply as they cannot drive the internal cct and display.

I have done it OK with SOME of the tiny checkers by making a 3S balance plug to various 1S battery connections.

One of the ISDT checkers I have will display 1S, but you have to make connections to the balance port.

Offline mo_miah

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easiest way to check a 1s lipo is with a multimeter
multimeters, even a cheap one, is a must have in my opinion for anyone working with electrics
just measure to output voltage on the output lead

Offline jamesb72

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Some of the cheap led checkers which flash through total volts and each cell voltage work down to 1s, i made a harness with all the usual connectors so i can check small lipos.

The one i used is like this one

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F122933775359

Offline trebor

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Depends on your 1 cell battery connection there all different. Most of these only go down to 2 cell for attaching your lipos https://www.banggood.com/JST-XH-Balance-Port-Adapter-for-Chargers-p-1060396.html?rmmds=search&cur_warehouse=CN

Offline trebor

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Here is a good picture  ~~ http://www.4-max.co.uk/gt-lipo-capacity-tester.htm

Not sure if this will fit your lipo, down near the bottom of the list  http://www.4-max.co.uk/cables.htm

I've got this meter might be the same controls without the wattmeter  http://www.4-max.co.uk/pdf/GT-Multifunction-Watt-Meter.pdf
« Last Edit: March 10, 2018, 09:48:17 by trebor »

Offline Two-Six

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Thanks for the info!  Those little battery checkers look good.  I do have a multi-meter or two, its just the pins are so small its a bit fiddly measuring the cell voltage.  I was just wondering why I couldn't use my existing battery checker. That thing about about one cell not having a high enough voltage to power it makes sense.

When I fly my new XK K110 helicopter, if I fly to my timer they usually end up at almost exactly 3.80 volts, perhaps I could push another minute out of them. 

This heli is still in the experimental stage...It works pretty well now I have almost sussed out the gyro in it, which has the ability to stabilise it so much its totally unflyable it is so docile at one end of the scale and so agile that it is a real handful and needs very delicate control inputs at the other end of the scale.  I have got it just about right now. Agile and nippy but with a little stabilisation.
Nighthawk Pro, Trex 450 L Dominator 6 cell *FLOWN*, Blade 450-3D, MCPX-BL, MCPX-V2, Hubsan X4, Seagull Boomerang IC .40 trainer, HK Bixler, AXN Clouds fly,, Spektrum DX7, Taranis, AccuRC