May I know what exact model of the battery it is?

What makes you think of reconditioning it when the cost of buying a new is a lot cheaper i guess?

GS GTZ4V 12V 3Ah (10hr)

Bought a new one, cost over RM120, if memory serves.
The second one did not last as long as GS.
Third one cost over RM210, if I recall. This one is lasting.
Instruction is to add distilled after 15 months but no indication of volume.

I dont know if recond is cheaper or not.

Eventually, the battery needs to be recharge or landfill.
LYN lots of 20k salary would not waste time or care about eco.
But for the few who comment and guide me - Thank you.

Probably IMAX B6 charger, from Cindy's in Kepong, about RM80+
Then a clamp meter from Mr.DIY RM32
Bought Aneng ST180 at 26, claim manufac warranty, but Lazada refuse to refund.
Now learning to use PGmall and Mudah.my

Still searching for sulphur. Its a side project and can only look into this when time permits.

Get yourself a bench power supply. Can supply what ever rate that you want.



Just don't leave it alone as it might damage your battery.

I have one, use it to charge many kind of battery.

This post has been edited by haturaya: Oct 12 2023, 08:17 PM

I think TS wants a low output battery charger, yours might be too powderful for TS..

Bench power supply can control the voltage and current, so it can be as TS required.

But TS kena sus d.

I bet u never use one. It's handy as you can dial up / down your voltage & current as you want.

yup, my working place chargers are all analog.. except that latest charger which I cant use without my boss supervisions.

1 thing I want to point out -

For vehicles lead acid battery, the recommended charging voltage range is 13V(min) - 14.5V(max).

does it differ by chemistry? like, calcium, silver, antimony, etc?

No idea..
My guess -

silver is used to boost discharge power but, requires high charging voltages.

As for calcium, it's used for reduced electrolytes lost.

I have a Bosch C3 since my bike always failed to start after a weekend. Then when i bring my bike for service the mechanic say either i got a fake yuasa battery or something is wrong elsewhere.

Turns out the headlamp bulb is draining the power preventing cranking up the engine. Changed that and Bob's your uncle.

But i still changed the battery anyways.

what bike? headlights not run through relay?
my bike the headlights will only turn on once there's enough voltage from the stator to trigger the headlights relay

it's a Z650. The voltage requirement for a bulb is not as high as requirement for cranking up an engine. same with cars.

means the headlights turn on the moment the key is in ON position?
not after the engine has started?

Light turns on and dashboard lights up in ON position. as per other vehicles i suppose.

+1 Thank you for this recommendation.
A bench power unit is costly.

+1 Thank you. I notice lead acid battery can apply different charging techniques.
Such as pulse charging, high amp charge and trickle charge. I was looking to trickle charge.

+1 Thanks for sharing.


In the end, I opt for an IMAX B6 v2 charger.
I could not find battery acid at reasonable price.
I abandon the project, salvage acid into another battery.

The bench charger was the best tool but the cost exceed a new battery.
Now that battery is dried out useless.

Thank you all for your input and thoughts.

Wow Necro thread. Hahaha


Anyway, not difficult to find trickle chargers on shopee.

Modern bikes with so much electronics tend to have battery drain issues especially if not ridden frequently. The 800NKs battery goes flat in 2-3 weeks of sitting so a number of us have an automatic trickle charger.

https://my.shp.ee/3nEAA8H

https://my.shp.ee/iav5NWH
Max 1.5A but I doubt it charges anyway near 1A at most.

I don't use a trickle charger as my bike is a daily bike so no issues with the battery running flat.

This post has been edited by jaycee1: Sep 20 2024, 10:05 AM

Buy this, power it with a 5V1A (5W) charger/powerbank that's widely available and cheap,
the output will meet your 0.3a requirement.

Loboo USB Charger
https://detail.tmall.com/item.htm?abbucket=...xc=taobaoSearch

https://shopee.com.my/LOBOO-motorcycle-batt...19-fb8764474bf8

Charger input output specs:

Thank you
I browse cannot find how the charger enables setting between the 3 modes.
The promo price is 162 exclude shipping, very costly to getting it wrong.

It's automatic based on input power.

That's why I mentioned, use 5A1A USB phone charger.

Plenty old charger are this specs.