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Unread 03-19-2016, 07:12 AM   #11
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Default Re: Charger with correct amp rating

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Originally Posted by ddh2433 View Post
Thanks for all the input everyone. So will I be better off with the 13 or 19.5 amp Lester charger. What I get out of it is the 20 hr. Amp rating is 170 for my battery type so a 17 amp charger is what would be recommended. If I'm wrong can someone explain it simpler.
You've got the charger amps pretty well figured out, but I'd contact US Battery and ask if the Lester charger(s) you are considering are, in fact, capable of properly charging US Battery brand batteries.

http://usbattery.com/contact/
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Unread 03-19-2016, 07:31 AM   #12
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Default Re: Charger with correct amp rating

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Originally Posted by JohnnieB View Post
You've got the charger amps pretty well figured out, but I'd contact US Battery and ask if the Lester charger(s) you are considering are, in fact, capable of properly charging US Battery brand batteries.

http://usbattery.com/contact/
Johnnie what does USB do that makes their batteries have elevated voltage?
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Unread 03-19-2016, 07:59 AM   #13
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Default Re: Charger with correct amp rating

Thanks JohnnieB I just emailed US Battery and when they respond I will post it.
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Unread 03-19-2016, 08:36 AM   #14
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Default Re: Charger with correct amp rating

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Originally Posted by ddh2433 View Post
Thanks for all the input everyone. So will I be better off with the 13 or 19.5 amp Lester charger. What I get out of it is the 20 hr. Amp rating is 170 for my battery type so a 17 amp charger is what would be recommended. If I'm wrong can someone explain it simpler.
The recamendation is 10 to 13 percent. In your case that's 17 to 22 amps. The 19.5 sounds good to me.
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Unread 03-19-2016, 08:38 AM   #15
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Default Re: Charger with correct amp rating

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Johnnie what does USB do that makes their batteries have elevated voltage?
I don't know, or at least I haven't figured it out yet.

Using a higher concentration of sulfuric acid will up the cell voltage, but according to the attached charts, US Battery uses a lower concentration than Trojan. I guess that means US Battery uses different chemistry in the plates.

Whatever it is, it is not limited to just US Battery vs Trojan. My DPI charger has different charge algorithms for US Battery, Trojan, Exide and Full River, and Trojan has the lowest voltages for the absorption and float stages.
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Unread 03-20-2016, 06:02 PM   #16
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Default Re: Charger with correct amp rating

Here is a link to Lester Chargers that will help with the correct amp rating on battery amp rating.

http://www.lesterelectrical.com/products/summit/
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Unread 03-21-2016, 08:04 AM   #17
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Default Re: Charger with correct amp rating

If you buy one of the chargers linked to, be sure to tell them you have US Battery batteries.

It appears they have brand/model specific charge algorithms.
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