Welcome:

Welcome to Alternative Battery Enterprise weblog, Alternative Battery Enterprise is a small business based in Malaysia, that realt/refill/recell or even repair your laptop and notebook battery.


Alternative Battery Enterprise always emphasize on the quality of the refilled battery, you are welcome to search for our services record or user experience on other web space.

Since first operates from year 2006, Alternative Battery Enterprise maintain good customer sales and services record.

Fast turn around time, your battery will be fixed in less than one week time. Usually customers get their batteries back in next day although they are normally told 3 working day to proceed. This could be the most efficient battery refill service that really work you could possibly found in Malaysia.

Battery is backed with 100% money back satisfaction guarantee in the first month of recell. Alternative Battery Enterprise accept any reasonable reject of any refilled battery and refund will be issued immediately in 3 working day after battery is post back to us.

A total of 1 year warranty will be given!

There are 6 months warranty on battery cell, in this period you will still get a refund of 80% if your battery fail beyond repair.

After 6 months, Alternative Battery Enterprise will still fix your battery if it fail within any period of 1 year without any additional charge excluded postage fees.

Even after the warranty period, if you confirm that your battery cell is still in good condition, but battery just no working, it can be repaired at RM30! Which is the best way to ensure you get a working battery that value for your money!

Most customers reported that a refilled battery work 2-3years! Some really poorly designed (too few cell with big load) battery may last merely just 1 year, some may last up to 4 years.

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Wednesday 17 October 2012

4-Pin to 3-Pin CPU Fan V2.0

I have written an blog entry about a heat sink fan unit that come with 3 pin fan where there are 4 pin connector on the motherboard, here.

I have replaced two stop working casing fans to new quality fans, previous casing fans die of lack of grease and rusted. But the new fans is noisy too, so I decided to tie the new casing fans to CPU PWM control.

Picture below show the signal from PWM pin-out of CPU fan socket:


It is ~23.5kHz control signal. Sometime, it take forever to hesitate but it only take one day to complete a not so difficult task.


I know the components used is overkill and not having optimized rating, especially the 100uH 2A inductor, fan won't required 2A, at 23.5kHz 5V output all it need is ~300uH 0.5A, but that is what I have in my hand currently. Without the inductor+capacitor filter, it still work but the rpm signal from fan will be significantly interrupted and there will be some weird reading like 11500 rpm.


Side view of control board showing that it connect to 3 fan. But it only take the rpm signal of CPU fan and feed it back to motherboard.
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1 comment:

Anonymous said...

I like your initiative to make a board that splits out the control signals to run multiple DC fans from one PWM fan signal. Ingenious, I could do with making something like this myself. Very well done. :)

26 February 2017 at 06:07

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