Posted by John T on August 21, 2016 at 14:15:42 from (216.249.81.101):
In Reply to: Alternator Bled back posted by farmallstrong on August 21, 2016 at 13:05:11:
NOOOOOOOOOOOO 0.5 Milliamps is only 1/2 of one thousandth of one amp, and that's HARDLY ANY AND CERTAINLY NOT enough to discharge a rubber chicken, let alone a 100 or so Amp Hour Battery in a short time period. So, if the battery is discharging prematurely, that's NOT enough draw to cause it. THERE MUST BE SOME OTHER PHANTOM LOAD or else the battery is shorted or badly sulfated and pretty well shot. A battery shop will check voltage and load test it for free plus measure its specific gravity. If the battery checks out okay then you have to find the short or load that's causing the discharge BECAUSE THAT TEENY TINY 0.5 MILLIAMP DRAW ALONE IN A SHORT TIME IS NOTTTTTTTTT THE CAUSE !!!!!!!!!!!!!!!!!!!!!
FYI Those cheaper lighter duty so called "RV/Marine" Batteries are semi deep cycle at best, NOT full true Deep Cycle batteries such as a deep cycle golf cart battery like Trojan and others make.
True full Deep Cycle Batteries have thicker plates and are designed to allow a relative deep discharge before recharging HOWEVER CAUTION its best NOT to draw them down much over 50% of their rated capacity on a regular ongoing basis because that reduces battery life significantly. DO NOT EVEN CONSIDER ITS GOOD TO DISCHARGE A DEEP CYCLE ALL THE WAY BEFORE RECHARGING JUST BECAUSE ITS A DEEP CYCLE BATTERY, THATS NOTTTTTTTTTTTT WHAT THEY WERE DESIGNED TO DO, a 50% max (I suggest no more then 20% to 30%) discharge before recharging is muchhhhhhhhhhhh better for the battery. Yes Billy Bob, they can be drawn down heavy and still recharge and still work but that's NOT best for battery or battery life
Cars trucks and tractors generally use a regular starting battery NOT a deep cycle which are used more on golf carts and forklifts and in the RV industry. SURE Billy Bob, they will still "work" in a vehicle but that's NOT their designed and engineered best use.
TEST THE BATTERY AND IF ITS OKAY FIND THE CAUSE OF THE CURRENT DISCHARGE IS MY ADVICE
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