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Unread 05-13-2009, 08:47 AM   #1
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Default Amperage draw down

The following specs (taken from the Battery Comparison Sticky) show the number of minutes at different amp draws. How do I determine the amp draw of my cart?
T-105, 447 Min @25Amps, 115 Min @75Amps, 225Ah @20Amps, 62 Lbs;
T-125, 488 Min @25Amps, 132 Min @75Amps, 240Ah @20Amps, 66 Lbs;
T-145, 530 Min @25Amps, 145 Min @75Amps, 260AH @20Amps, 72 Lbs
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Unread 05-13-2009, 08:58 AM   #2
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Default Re: Amperage draw down

Those battery specs are tricky sometimes.... everyone changing the test to get the results they want......If you are looking for info to help you determine the proper usage of your battery pack, refer to this chart and use the 50% draw down rule
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Unread 05-13-2009, 09:05 AM   #3
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Default Re: Amperage draw down

To answer your question, you determine the actual amp draw of your cart by measuring it with a DC ampmeter, something none of us actually own. The numbers you provided are for comparing the batteries to each other. Your cart is the constant in the equation.
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Unread 05-13-2009, 09:15 AM   #4
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Default Re: Amperage draw down

A DC amp meter with a scale high enough to read ( OVER 250 ) and should be available from electronic supply houses but be ready to pay through the nose for them. While in the service during the Korean war we had meters heavy enough to cover the range up to 1000 AMPS. Maybe there are still some around from surplus stores that can be picked up for a song?
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Unread 05-13-2009, 09:21 AM   #5
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Default Re: Amperage draw down

Quote:
Originally Posted by scottyb View Post
Those battery specs are tricky sometimes.... everyone changing the test to get the results they want......If you are looking for info to help you determine the proper usage of your battery pack, refer to this chart and use the 50% draw down rule
Heh, I'm with you, now what is the 50% draw down rule.

Dick
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Unread 05-13-2009, 09:48 AM   #6
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Default Re: Amperage draw down

The Trojan battery co. ( which is the industry leader in GC batteries) says do not draw the pack down below 50% capacity. Armed with this chart and a simple voltmeter you can determine when 50% occurs and extend the life of your pack by recharging at or before 50%.... all battery readings for full charge are taken 1 hr after charger shuts off... hope this helps?

ps:
To get the most out of your batteries...... Install a voltmeter and calculate it with your handheld to verify where 50% is at.
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Unread 05-13-2009, 09:51 AM   #7
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Default Re: Amperage draw down


It sure does help, thanks. Lots of stuff to learn, appreciate your thoughts.
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Unread 04-13-2010, 10:16 AM   #8
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Default Re: Amperage draw down

If a golf cart repair shop marks your repair ticket with: "92 amp drawdown. Batteries are good." What does this mean, other than their phrase "batteries are good"?
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Unread 04-13-2010, 04:55 PM   #9
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Default Re: Amperage draw down

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Originally Posted by wtc88c View Post
If a golf cart repair shop marks your repair ticket with: "92 amp drawdown. Batteries are good." What does this mean, other than their phrase "batteries are good"?
I'd like to know too, I've never hear that before.
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Unread 04-13-2010, 06:06 PM   #10
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Default Re: Amperage draw down

Maybe wtc88 can call the shop and get an explanation for us?
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