Recent content by Renault4

Amazing! I was looking at a KONNWEI KW208 but eventually settled on the Topdon. I'm impressed sofar, but wish it was made in the UK.

UPDATE Today I've tested the battery (fully charged about 3 days ago) with a TOPDON BT100 Battery Tester. It says it is good. I've also tried the tester on an old discarded battery which was at 1.5V . It wouldn't work until I'd got the battery up to several volts at which point it asked for the...

I think the point being made was that if a calcium battery needs a higher voltage for a full charge, a normal float charge function which keeps a conventional battery fully charged, would not do that with a calcium battery. I was told it was tested while flat.

OK - I've discharged it with a headlamp bulb. That gives a current of about 5A which is about C/12.4. I don't want to take it right down to 10V as I gather that would be harmful. At C/12.4, the battery would be totally discharged at 10V - according to the chart at...

I tried to do a capacity test - discharging at C/8.9 down to 11.9V which should be (?) close to 50% capacity - see attached results. It is difficult to know what is 50% capacity though when starting voltage is so high. And looking at the voltage 15 mins after recover - 12.3v and rising, it looks...

Can you expand on that? Is the smart charge system part of a normal alternator or is it only on the cars which need to have battery information coded into them when a new battery is installed? Would a 2008 Golf have a "smart charge system"? OR Would all new alternators now be able to correctly...

That meter currently says 13.48V. Another meter I have says 13.47V A charger I have which gives a reading when connected to battery (before being plugged in) says 13.5V

It is currently at 13.49 V and it is over 19 hrs since last charge. Temp will be about 10℃. The car is a 2008 Golf 1.9TDI.

The Plot Thickens! (Please tell me if I'm going off on a tangent) The expensive replacement battery fitted by the garage was also a calcium technology battery, so would their fancy tester have also told them to replace it I wonder? Elsewhere I read : "An ordinary lead-acid battery will...

CALCIUM BATTERY!!! There is nothing on the battery that says calcium. But having looked that battery up, I now wonder if the garage have actually been sort of right to replace it: When I put the car reg into the GSF website, it comes up with that DriveTec battery as the cheapest option and...

Logistics is one reason

Load was an inverter powering a 230V electric heater. The discharge current was measured using a clamp meter on one of the cables between battery and inverter. It has the figure of 540 on it - presumable CCA, so test load should have been a lot higher, but I suspect that result shows it is still...

Best I can currently do in the way of testing under load, gave the following results: 93 Amps for 55 seconds during which voltage decreased to 11.77 then increasing load to 134A for 19 seconds during which voltage declined to 11.41V and 50s after switching off load, voltage had risen to 13.0V...

Thankyou. That is what I wanted to know. It looks as if the garage was under heavy load and suffering from replaceititis.

The battery has obviously not been "cooked" as it takes a full charge and holds a good voltage, so that info was fake. The reason for my question is that I'd like to know if the claim that it can be tested and condemned while flat is also fake. 12.6V is the threshold below which a 12v lead acid...