Makita power tool battery circuit board problems

When a person gets in his late 70's he believes he knows most things. Rest assured that is not true and I have allowed myself to learn anything I can.Here is what I have learned lately;

Makita in their wisdom created a battery protection system unlike any other on the market. There Li-Ion batteries and chargers operate from four parameters of information. All parameters must be met before the battery can be charged. If one parameter fails the circuit board in the battery gives the charger three attempts to function. If it fails to comply the chip in the battery shuts the charging circuit down permanently. This wisdom was probably implemented in a safety protocol all corporations use against liability these days. They think.

I thought this was some conspiracy theory by other entities, but in my opinion it is not.

Bottom line,

I have two perfectly good batteries sitting here that I can charge with all safety features intact, but they can't be charged with a Makita charger.

I use a universal smart charger that performs all safety parameters as the Makita but is not influenced by the Makita chip. My charger has the ability to charge multiple batteries at a time of all brands but cannot perform the function of product brand specifics.

Once I run the gambit of tests and conclude the battery is functional I still do not know if the specific brand charger will charge or not without having that charger. This implies that I have to have dozens of chargers in house to know if I am finished or not.

I think technology has come close to perfecting the perfect OSHA approved device. If the charger does not charge no one can be hurt. Perfect world, unless you need to use power tools.

Eco Friendly power tool battery rebuild, recycling

Being Eco Friendly is an important responsibility.

These batteries like others listed in my store are those that have been disposed of either in recycling or in landfills. Most of these batteries were unusable, mostly by the shorting out of a cell or two.

I completely disassemble each unit and test all cells for   usability. 
I add cells from other teardowns of like compatibility until I get a pack that performs.  This minimizes the impact to the enviroment as well as supplying my customers to low cost replacements.

Almost 90% of recycled power tool batteries and similar types of batteries around the job or house are generally put into landfills. There is not enough volume of recyclable materials to promote recovery operations. You might have good intentions and put your batteries in a recycle container but sadly they are not.

Purchasing this battery will not change the worlds problems with hazardous waste, but it all helps. 

I have invested a lot of time in this program and so far it has proven successful. I feel better and the customer gets a good product with a warranty.

The process includes at least the following:

1- Completely dismantle used batteries, Test all cells and replace those that fail. Test the pack on a computer aided breakdown testing unit and confirm the rebuilds usability.

2.  The battery is ready to go back to work,

3. Full replacement 30 day warranty.

4. See my eBay store for details.