Minimum battery voltage

**red_one** · February 10th, 2017 06:12 PM

Originally Posted by baludoy

Kaya pa ba madala sa digital charger ang pag charge ng mga naka 9v na batt para bumalik sa optimum or satisfactory condition?

to be or not to be, that always confuses me!

Depends sa age ng battery. If too old, baka hindi na maghold ng charge. You will charge today, pero drained ulit the next day. If you have battery charger, use it. No harm in trying.

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**red_one** · February 10th, 2017 06:17 PM

Originally Posted by kimbon

It's not voltage that determines whether you can start the car, but it's the starter's ability to deliver amperage. A volt meter will only give you a rough idea of the state of charge assuming that the battery is known to be in good condition. An average car batt produces roughly 400 to 500A to start the car. Assume the car batt is 9V while cracking but the ampere is only 70 so di pa rin mag-start ito

So how do you measure the remaining amperes of your battery? Para alam mo kung magstart pa engine?

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**red_one** · February 10th, 2017 06:19 PM

*double post*

**kimbon** · February 10th, 2017 06:25 PM

use the ampere meter

**red_one** · February 10th, 2017 06:30 PM

Originally Posted by kimbon

use the ampere meter

Ampere meter is not easy to use on car battery. Whereas a voltmeter, you just connect in parallel sa terminals. Basta 12V and above, I am good to go. One click start. Never pa ko nagmeasure ng amperes ng battery.

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**kimbon** · February 10th, 2017 06:52 PM

Originally Posted by red_one

Ampere meter is not easy to use on car battery. Whereas a voltmeter, you just connect in parallel sa terminals. Basta 12V and above, I am good to go. One click start. Never pa ko nagmeasure ng amperes ng battery.

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maybe your multi tester has only up to mA (milliamp) range. Mayron sa T alonzo high ampere range.

**red_one** · February 10th, 2017 06:59 PM

I have a 400Amps AC-DC digital clamp meter but I have not used it for car battery yet.

Ito lang ginagamit ko. In-car voltmeter.

Engine Off - 12.6V (Battery OK - Fully Charged)

Engine On - 14.5V (Alternator OK - Battery Charging)

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**kimbon** · February 10th, 2017 07:24 PM

iba yung saken. mine is digital handheld clamp meter multimeter with probes. if mahanap ko sa bodega i post ko.

**kai s.** · February 10th, 2017 09:43 PM

^ I use the same voltmeter that *red_one posted. Seems accurate naman, same reading with the handheld clamp type meter used by the casa when I had my car serviced last weekend.

**JJB** · February 11th, 2017 12:01 AM

Originally Posted by red_one

I have a 400Amps AC-DC digital clamp meter but I have not used it for car battery yet.

Ito lang ginagamit ko. In-car voltmeter.

Engine Off - 12.6V (Battery OK - Fully Charged)

Engine On - 14.5V (Alternator OK - Battery Charging)

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I use a similar one pero I bought one na walang temperature. Kahit cheap chinese gadget sya, accurate sya.