Quote:
Originally Posted by decojoe67
Thank you so much, but please bear with me, the novice I am in electronics. If I could not get any audio out of the speaker with the 6V 4AH battery then how it is possible that I did with the 6V 12AH one? That was my reasoning for going ahead and trying a 6V 20AH battery. Does this reasoning make sense or can I expect to be disappointed with investing in the 20AH battery other than a longer life?
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Sounds like the 4AH battery's voltage was sagging under load, while the 12AH battery was holding up. Having twice the AH capacity, it can sustain twice the load (12 amps) without sagging (if fully charged). Was the 4AH one fully charged?
You need to put a voltmeter on the battery and monitor its voltage under load. If the 12AH battery holds 6V without sagging, then going to a 20AH battery would be no advantage other than run time.