New Battery / Alternator Kwik Fit

oldagetraveller1

"I had a stop / start battery fitted"

In their print out it states battery type as standard. I thought that vehicles with stop/start should have a battery sufficient for that technology?

Mutton_Geoff

forgotmyname said:

Mutton_Geoff said:

forgotmyname said:

Just because the alternator charges does not mean its 100%.  Faulty rectifier?

Which is integral inside the alternator. 

Yes and?   Your point?

Just because the alternator passes the charge test does not mean the alternator is 100%.  The rectifier could be faulty
and draining the battery. This may only happen some days and not others or at certain temperatures or even when
there is a temperature change, or even down to the moisture in the air.

Lots of ways it could pass the charge test yet actually be faulty.

I agree but probably misread your post thinking you were directing the OP towards "the rectifier" as a separate component when it's an integral part of the alternator. Unless they have the knowledge to strip and test an alternator and it's parts, then failure of any of the electronics inside the body of the alternator means they would need to replace "the alternator".

droopsnoot said:

What does that "Battery health" bar graph actually measure? 
Interesting that the first receipt has a note about the charging system on the bottom that says "no problems".

It appears the graph is measuring the battery volts with a narrow range. The "low" indication is 12.39v and the "high" is 12.48. A range of 0.09v over six blocks of the display so circa 0.015v per division. I honestly doubt the equipment could accurately measure or is calibrated to three decimal places of voltage, so I'd say the graph is indicative rather than definitive.