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COLVERT · 31st October 2019, 20:29

Further to this battery thread if anyone is interested.

Battery voltage is not an accurate indication of battery condition.

A battery can show a high voltage reading even when it is half way through its useful life.

Before batteries became sealed a test of the electrolyte was quite an accurate method of assessing the battery.

Now the only accurate way is to use a garage Drop Tester.
This will measure battery Capacity. ie. how much power is available for work. Voltage is only an indicator of battery Pressure ( volts. ) and not capacity.

For instance if only ONE plate of a battery was working you could still get a reading of 12.68 volts.--

Wouldn't start your car though.----

31st October 2019, 20:29	#24
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Further to this battery thread if anyone is interested. Battery voltage is not an accurate indication of battery condition. A battery can show a high voltage reading even when it is half way through its useful life. Before batteries became sealed a test of the electrolyte was quite an accurate method of assessing the battery. Now the only accurate way is to use a garage Drop Tester. This will measure battery Capacity. ie. how much power is available for work. Voltage is only an indicator of battery Pressure ( volts. ) and not capacity. For instance if only ONE plate of a battery was working you could still get a reading of 12.68 volts.-- Wouldn't start your car though.----