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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Sunday 6 December 2009

Controllable Current Sink/Source Device

Our lab new member, controllable current sink/source device, the picture below show a working prototype.

Technical Spec: -General-
Interface: Fully I2C controllable, seamlessly switch between source and sink
Input Voltage: 16-24V
Current Sense: Gound Side, 20miliOhm sense resistor

-Current Sink Section-
Type: Closed loop current sense, high error amplification gain, fast sinking current correction
Maximum Current Sink: > -4A
Minimum Current Sink: 0mA
Sink Current Stability: Within 5% variation of sink current
Resolution: ~50mA per increasement, up to maximum current sink/sources

-Current Source Section-
Type: Buck Topology, closed loop current sense, bootstrapped high side N-Channel drive
Maximum Current Source: >5A
Minimum Current Source: 0mA, first step is ~200mA
Regulation Stability: Within 5% of output current, variation less than 50mA
Resolution: ~50mA per increasement, up to maximum current sink/sources
Temperature Stability: N/A (not tested)
Bulk Source Efficiency: >90% at 50-60% duty cycle
Transient Response: N/A (not tested, but in the catogory of considered slow
Switching Frequency: 200KHz
Ripple Voltage: less than 1v


Laboratory equipment, suitable to charge/discharge smart battery, can work together with microcontroller through I2C to modify the output current according to the aplication need.

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