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Some stuff i learned today about batteries
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<blockquote data-quote="swampratt" data-source="post: 2400858" data-attributes="member: 15054"><p>I learned this the hard way.</p><p>I have 4 12 volt batteries that i use in my garage to power a pin tumbler to clean brass cases.</p><p></p><p>These batteries are old but will turn a small dc motor fine and with a fresh charge will crank a car up.</p><p>One of these batteries in the bunch will drain to the point where it will not power anything.</p><p></p><p>I hooked them all in parallel to keep voltage at 12 </p><p>Now i had them on my charger which is a 4 amp that trickles down to nothing when they are charged.</p><p></p><p>I usually leave 1 battery on this charger for 8 hours..never any issues with the charger.</p><p></p><p>So with all batteries tied together i charged them all at the same time.</p><p>The charger trickled down to 1.5 amps after so many hours and I removed it.</p><p></p><p>I left all batteries hooked up together..</p><p></p><p>WHAT I LEARNED:::</p><p>After a couple weeks hooked together i went out today to tumble some brass.</p><p>NO GO!!!</p><p>The tumbler spins very slow..I checked Voltage and i get 7.8Volts</p><p></p><p>I found out ONE bad battery will drain all the other batteries if they are all hooked together.</p><p>SUCK!</p><p>Now i will charge them all individually and see if any will hold a proper charge.</p><p></p><p>Hope this helps the next guy...</p></blockquote><p></p>
[QUOTE="swampratt, post: 2400858, member: 15054"] I learned this the hard way. I have 4 12 volt batteries that i use in my garage to power a pin tumbler to clean brass cases. These batteries are old but will turn a small dc motor fine and with a fresh charge will crank a car up. One of these batteries in the bunch will drain to the point where it will not power anything. I hooked them all in parallel to keep voltage at 12 Now i had them on my charger which is a 4 amp that trickles down to nothing when they are charged. I usually leave 1 battery on this charger for 8 hours..never any issues with the charger. So with all batteries tied together i charged them all at the same time. The charger trickled down to 1.5 amps after so many hours and I removed it. I left all batteries hooked up together.. WHAT I LEARNED::: After a couple weeks hooked together i went out today to tumble some brass. NO GO!!! The tumbler spins very slow..I checked Voltage and i get 7.8Volts I found out ONE bad battery will drain all the other batteries if they are all hooked together. SUCK! Now i will charge them all individually and see if any will hold a proper charge. Hope this helps the next guy... [/QUOTE]
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