19-02-12, 12:44 AM
If it reads 14.23V after 24 hours of 'resting' then your voltmeter is inaccurate... :'(
Typically they read 14.3 volts (ish) when they're fully charged and still charging.
If you let them rest from that state then they gradually relax (over a few hours) to about 12.9V.
Over the next month they self-discharge down to about 12.0V.
No 12V battery I ever saw will maintain 14V after 24 hours of inactivity.
BTW ... to check your voltmeter... a brand new Duracell 1.5V alkaline battery at room temp is about 1.56V.
(that's the simplest 'calibration' I've managed to think up over the past 10 years. Everything else relies on a 'special chip' or a calibration lab.)
Typically they read 14.3 volts (ish) when they're fully charged and still charging.
If you let them rest from that state then they gradually relax (over a few hours) to about 12.9V.
Over the next month they self-discharge down to about 12.0V.
No 12V battery I ever saw will maintain 14V after 24 hours of inactivity.
BTW ... to check your voltmeter... a brand new Duracell 1.5V alkaline battery at room temp is about 1.56V.
(that's the simplest 'calibration' I've managed to think up over the past 10 years. Everything else relies on a 'special chip' or a calibration lab.)