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I have some 8v batteries in old tractors,we can not charge them with a 12 volt charger,the 6 volt side does not get to 8volts so if we have dead batteries we pull to start then the the gen/recharges the batt.voltage reg will let 8.5 volts in.so how do we recharge,and is tere a float /trickle charge that will keep the batt charged,thank you
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14 volts charge is correct. Standing voltage on a good fully charge battery is 13.2 volts or so. I check one on charge with a 6 amp charger and it was 14.2 volts. It dropped to 13.8 with charger off.
All batteries need to be fully charged. It should hold about 12.3 volts. Amps is the important thing and if you have a ful battery, and the machine turns sluggishly, it means the battery is low in amps. This reduces over time and can only be tested with a special tester. Any Interstate shop or garage will test it for you free of charge.
What I have learned is that if a battery is completely dead, you have to jump it to another or at least get some charge in it to get a smart charger to work. Once it ...
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if you want the same voltage but with increased capacity connect positive to positive and negative to negative on each successive battery ---connected in parallel
example 6 X 12 batteries each of 200 crank hours will be equal to 12 volts and 1200 crank hours ( good for mobile fridges , winches , battery hoists etc)
if you want to increase voltage in the bank then connect positive to negative for each successive battery ---connected in series
for example
with 6 X 12 batteries of 200 crank amps you will have 6 times the 12 volts which equals 72 volts and the current flow is increase from 200 crank amps to exceed the 1200 crank amps because of the electrical principles and formula I think it works out to be around 72 times the 200 crank amps ( I am sure that there are mathematicians out there that will adjust the sum to make it correct)
However I think that you get the idea
when charging batteries it is always positive to positive with the battery leads to the first battery in the bank and the difference is if in parallel the charger has to be big enough the charge at the accepted rate of the batteries ( 12 volts charge at 14.5 volts and around 20 amps an drop back as the batteries charge
when the batteries are in series it all changes and best talk with a good battery supplier as to how it is set up and if you need to change the charging circuit and equipment
7 or 8 won't help you, you need 12.5+ volts to start an engine.
If the battery is dead because of age then it's done for. If it's dead beacuse something was left on, stereo, lights, etc. Then yes, jump starting the car will allow the car's alternator to recharge the battery.
Hello! Due to Charger Voltage Compatibility: Never use a battery charger unless the battery voltage matches the output voltage rating of the charger...Therefore do not use a 6-volt charger on a 12-volt battery and visa-versa... guru........... saailer
YOU CAN USE AN 8 VOLT BATTERY, IT SHOULDN'T HURT ANYTHING. THE ONLY THING IS IT WON'T STAY FULLY CHARGED. THE GENERATOR IS DESIGNED FOR A 6 VOLT BATTERY NOT 8 VOLTS. WHAT I DO IS CHANGE THE SYSTEM TO 12 VOLTS. NOTHING WILL HAVE TO BE DONE TO THE STARTER, IF THE TRACTOR STARTS LIKE IT IS SUPPOSED TO. IT WILL JUST START FASTER. YOU WILL NEED NEW POINTS & CONDENSER & A RESISTOR FOR THE DISTRIBUTOR. ALSO A 12 VOLT BATTERY & A MID 1970'S INTERNALLY REGULATED ALTERNATOR, MOUNTED IN PLACE OF THE GENERATOR. THIS A LITTLE WORK BUT THE TRACTOR WILL START AMAZINGLY FAST. I HAVE DONE THIS SEVERAL TIMES & IT WORKS GREAT. IF THE FUEL GAUGE STILL WORKS YOU WILL NEED A SPECIAL RESISTOR FOR THAT. OF COURSE ANY LIGHTS WILL HAVE TO BE CHANGED TO 12 VOLT GOOD LUCK. DR. VOLT.
Yes to both questions. the charger must sense 41.5 volts to activate the relay inside the charger. Being a repair shop, I have a charger that is rigged to charge even DEAD batteries. I do not recommend this for the novice. A charger set on 12 volts will bring the batteries back up to 8.2-8.6 volts. A cheap trickle charger may not put out enough to charge a battery of this size. Remember that they are used to MAINTAIN a charge. Connect the Voltmeter and watch for voltage rise. If it rises to 8.1 or above, it is charging. Trojan battery company recommends charging at least once a month.
How many amps does this charger put out????
A small trickle charger will take forever to fully recharge a dead battery, you'll need to have a battery charger that can put out enough amps to properly charge a dead battery.To clarify, the chargers sold at Sears, the large square types on wheels are the best for charging dead batteries and they also have an amp meter telling you how much the battery is accepting. After you charge your battery, you should be around 12.5 volts to 12.7 volts. DO NOT OVER CHARGE!!!
You are correct on all accounts. A high number means you dying battery is sucking more juice from the Schumacker. A low number means the battery is not as thirsty. That's how I always think of how to read the meter on mine. Slow charge is a better, deeper charge. The quick charge will get you going, but you should maybe follow it up using the normal mode - car alternator and prolonged drive time. I never use quick charge, personally.
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