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 Post subject: Makita from g to LXT
PostPosted: Fri Jan 06, 2017 9:16 pm 
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Hi everyone!

I accidently bought a makita hedge trimmer, which is not suitable with my lxt batteries, meaning the tool body was from the g-serie.
I discussed about the matter with the ebay seller, but he says he is not responsible for covering the return shipping fees, which would be 1/3 of the purchase price.
There was no mentioning about the battery compatibility, just informing that it works with 18V makita batteries.

And now I would want to ask, would the hedge trimmer work with LXT batteries if I installed an LXT battery terminal/contact plate to the body of the trimmer?
I attached a photo of the terminal (g-series one) (ignore the red oval).

If anyone knows or has experience of such thing, please feel free to share it with me

Regards,
Janne


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 Post subject: Re: Makita from g to LXT
PostPosted: Fri Jan 06, 2017 10:02 pm 
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heeelllooo and welcome ebetra :welcome: :welcome: :welcome:
not worth the trouble really
if i remember rightly is it something to do with battery capacity as in high draw tools can cook smaller capacity batteries so not worth the risk
what ah [amp hour ] are your batteries and how old are they ??
i could off course have an incorrect recollection so wait for others to comment

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 Post subject: Re: Makita from g to LXT
PostPosted: Fri Jan 06, 2017 10:56 pm 
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Maybe I'm wrong, but isn't the G-series also a slightly different design physically? One of the guys who works for us has a G-series battery and LXT batteries won't slide onto that, nor will the G-series batteries slide onto an LXT - this is according to him. I thought the pin arrangements were somewhat different.

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Makita LXT Battery Connection 001 01.JPG
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I still have an old shell from an impact driver that was "reskinned". I'll ask him on Mpnday if we can do a little experiment if you'd like

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OK, I'm an "old school" chippie, so please don't ask me to do a bodge job - I didn't bring my horse today and in any case you don't seem to have a hitching rail!


Last edited by Job and Knock on Fri Jan 06, 2017 11:08 pm, edited 2 times in total.

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 Post subject: Re: Makita from g to LXT
PostPosted: Fri Jan 06, 2017 11:03 pm 
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yes it could be that i just rember star marked tools or something like that :lol: :dunno:

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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 12:17 pm 
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Job and Knock wrote:
Maybe I'm wrong, but isn't the G-series also a slightly different design physically? One of the guys who works for us has a G-series battery and LXT batteries won't slide onto that, nor will the G-series batteries slide onto an LXT - this is according to him. I thought the pin arrangements were somewhat different.



I still have an old shell from an impact driver that was "reskinned". I'll ask him on Mpnday if we can do a little experiment if you'd like


Maybe you are right, they might be physically different and would require some kind of slotting to make it fit. If you would be so nice to do such expirement, go ahead! :-)

big-all wrote:
heeelllooo and welcome ebetra :welcome: :welcome: :welcome:
not worth the trouble really
if i remember rightly is it something to do with battery capacity as in high draw tools can cook smaller capacity batteries so not worth the risk
what ah [amp hour ] are your batteries and how old are they ??
i could off course have an incorrect recollection so wait for others to comment


My LXT batteries are 4 ah


What is this makita g-series anyways? I've never been introduced to them earlier


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 12:32 pm 
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iirc the G series is the lower end Makita diy grade stuff usually comes with 14.4 or 18V 1.3 ah with the grey or white tops


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 12:47 pm 
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When I tried to fit my 4.0 battery onto my BHP451 combi drill it would't fit, you need to knife off the small plastic block on the tool where the battery slides onto.


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 1:53 pm 
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Master of all wrote:
When I tried to fit my 4.0 battery onto my BHP451 combi drill it would't fit, you need to knife off the small plastic block on the tool where the battery slides onto.


As much as I have learned to this day there seems to be 3 series from makita 18V: LXT, G and if I remember correctly the third one is LCT.
LCT tool bodies has the block you are talking about, and by removing it you can use LXT batteries aswell, but be careful since LCT tools does not have the low-battery cover system.


But my main question is that is it possible to modify the g serie hedge trimmer to be used with my 18v lxt batteries, can I just install the new contact plate and run the tool without making explosions or electric shoks? :binky:


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 2:22 pm 
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ebetra wrote:
But my main question is that is it possible to modify the g serie hedge trimmer to be used with my 18v lxt batteries, can I just install the new contact plate and run the tool without making explosions or electric shoks? :binky:


I should think so, after all I modified a Dewalt nail gun to accept Makita LXT batteries. You only need to connect a +ve & -ve correctly.

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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 2:56 pm 
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Master of all wrote:
When I tried to fit my 4.0 battery onto my BHP451 combi drill it would't fit, you need to knife off the small plastic block on the tool where the battery slides onto.

Earlier B-series LXT tools are not necessarily compatible with later high amp MakStar batteries. In the D-series tools and some later B-series tools Makita introduced circuitry to limit the capability of the tool to draw so much power that the batteries overheated and potentially failed (in extremis all Li-Ion batteries can combust - Google Boeing 777 Dreamliner if you don't believe me). If you do make this mod be careful to check from time to time that the battery isn't overheating (e.g. when using a 150mm holesaw on a composite warm roof..... :oops: ).

B-series tools capable of using the later high amp batteries generally have either a yellow connector plate with or without the Makita Star logo (see photo above) or they have a black plate with the Star logo on it. The B-series LXT is what ebetra is probably referring to when he talks about "LCT" tools

The current D-series tools all have this circuitry built into the tool as well as low voltage detection and in addition the MakStar bateries (which have a star log on top) have some form of temperature sensor which means that a D-series tool with a MakStar battery will automatically shut down if the battery starts to overheat or the current drawn is too high or the volage drops too low. Some of the late B-series tools such as the BTD145 impact driver also had this feature built-in. It has meant an and to pretty much all those tales of unreliable Makita batteries, often from people who simply pushed tools too hard.

ebetra wrote:
But my main question is that is it possible to modify the g serie hedge trimmer to be used with my 18v lxt batteries, can I just install the new contact plate and run the tool without making explosions or electric shoks? :binky:

If we can get a G-series battery to go onto an (later) LXT body then we'll at least know if the form facto is correct. The next stage might be to try conver ting a surplus G-sries drill. But that will be Monday, as I don't have any G-series stuff myself. I doubt that you'll get a shock, but if it works you will need to monitor that the battery doesn't overdrain or get too hot, and you will need to get into the habit of bringing the batteries indoors and recharging them after each session. Also don't store LXT batteries (or any form of Li-Ion battery) out in the garden shed - freezing weather can kill them

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OK, I'm an "old school" chippie, so please don't ask me to do a bodge job - I didn't bring my horse today and in any case you don't seem to have a hitching rail!


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 5:02 pm 
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It depends how its pinned out and the way the tool handles the sensing so the cells don't drop below there threshold if you run the cells down too low they tend not to take a charge and the chemical in the cell breaks down

Todays modern lithium batteries are not plug and pray they are complex with built in motoring and thermal cut off features, unlike the old ni-cad batteries


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 07, 2017 5:44 pm 
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darrenba wrote:
ebetra wrote:
But my main question is that is it possible to modify the g serie hedge trimmer to be used with my 18v lxt batteries, can I just install the new contact plate and run the tool without making explosions or electric shoks? :binky:


I should think so, after all I modified a Dewalt nail gun to accept Makita LXT batteries. You only need to connect a +ve & -ve correctly.


That sounds nice. How does it run with makita batteries and was it a hard project? Since makita does not have nailguns on LXT serie it would be handy :-)

Job and Knock wrote:
Master of all wrote:

ebetra wrote:
But my main question is that is it possible to modify the g serie hedge trimmer to be used with my 18v lxt batteries, can I just install the new contact plate and run the tool without making explosions or electric shoks? :binky:

If we can get a G-series battery to go onto an (later) LXT body then we'll at least know if the form facto is correct. The next stage might be to try conver ting a surplus G-sries drill. But that will be Monday, as I don't have any G-series stuff myself. I doubt that you'll get a shock, but if it works you will need to monitor that the battery doesn't overdrain or get too hot, and you will need to get into the habit of bringing the batteries indoors and recharging them after each session. Also don't store LXT batteries (or any form of Li-Ion battery) out in the garden shed - freezing weather can kill them


Thank you for the info, I keep good care of my tools and would never leave them out in the freezing weather! :wink:


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 21, 2017 9:47 am 
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Progress:

I ordered an LXT battery terminal from ebay and received it yesterday.
Swapped it with the previous one, and when I tried to run the trimmer with the LXT battery, it only showed me a red light
In the manual it said that the red light turns on when the tool is overloaded or something like this.

Is there something I need to remove from the tool?


Thanks in advance!


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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 21, 2017 12:37 pm 
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ebetra wrote:
Progress:

I ordered an LXT battery terminal from ebay and received it yesterday.
Swapped it with the previous one, and when I tried to run the trimmer with the LXT battery, it only showed me a red light
In the manual it said that the red light turns on when the tool is overloaded or something like this.

Is there something I need to remove from the tool?


Thanks in advance!

theres your answer as i pointed out in my first post the tool will try to draw to much power more than the battery can give so the battery is protecting its self as it is designed to do


its obviously to do with how many amps the newer tools demand exceed what the older batteries can give and thats why the they dont fit

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 Post subject: Re: Makita from g to LXT
PostPosted: Sat Jan 21, 2017 3:43 pm 
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as I said above its not that easy. the battery packs have built in protection the device also has current sensing so it knows what level the cells are at you may find the 2 systems are incompatible with each other, also the way circuitry is designed will have a big factor

iirc the chargers are interchangeable why not get the correct pack for the strimmer

assuming you got this 'new other' from ebay it may be a customer return with a issue


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