A true deep-cycle battery is supposed to be charged at a higher voltage then a cranking battery. 15 volts normal charging and 16 volts to "equalize." That's why deep-cycle batteries never get fully charged when hooked to standard automotive alternators.
12.3 volts is a battery with only 70% charge - IF your voltmeter is correct.
You stated it's a 12 volt battery which makes me think it is NOT a true deep cycle - but more of a quasi dual-purpose battery. But, I could be wrong. What brand and what part # batteries are they?
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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