 Battery Chargers, Can you over charge ? |
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| sjhowitson |
 Feb 10 2006, 11:56 AM
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#1
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Member  Group: Members Posts: 478 Joined: 4-August 04 From: Moraga, CA Member No.: 2,449  |
I have a battery charger a friend gave me. I want to plug it into the 914 for the winter to keep the battery charged. Can you over charge the battery? I don't know if the charger has an auto shut off or not. Anybody ???? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
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| WRX914 |
Feb 10 2006, 12:02 PM
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#2
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2.5 WRX STI hybrid powered beast Group: Members Posts: 782 Joined: 16-September 04 From: Las Vegas, NV Member No.: 2,771 Region Association: Southwest Region |
it all depends on your charger...
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| Rand |
Feb 10 2006, 12:10 PM
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#3
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Cross Member Group: Members Posts: 7,413 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
There are battery "tenders" made for that. I wouldn't leave a battery on a charger over the winter.
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| blitZ |
Feb 10 2006, 12:11 PM
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#4
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Beer please... Group: Members Posts: 2,223 Joined: 31-August 05 From: Lawrenceville, GA Member No.: 4,719 Region Association: South East States |
You should not plug in a charger and leave it unless it is designed for that purpose or it will overcharge. There are some smart chargers which trickle down when needed and turn stop charging when the battery is topped.
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| SLITS |
Feb 10 2006, 12:47 PM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
When you start cooking the "electrolyte" with overcharging, the "electrolyte" vaporizes off and exposes the plates...if you continue charging the plates will buckle, touch each other and short.
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| gary gartner |
Feb 10 2006, 01:03 PM
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#6
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i know more than a newbie---way less than a guru Group: Members Posts: 239 Joined: 16-December 04 From: Valencia, Ca Member No.: 3,294 Region Association: Southern California |
Check the Performance Products site. the have a 'tender' in the 30-40 $ range (IIRC) compact size, is comfortable between my battery and charcol canister. made by Shrader on something similar.
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| lapuwali |
Feb 10 2006, 01:40 PM
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#7
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
When you first start using your "tender", place a meter across the battery terminals to check the voltage, which should be 13.5-14v with the Tender hooked up. I've killed batteries with these things, including the brand-name "Battery Tender", which indicated it was charging when in fact it wasn't, and the battery was DIScharging through the tender. A few days later, totally flat battery.
Some of the Optima batteries can fool these things into providing a major surge of current when initially hooked up, as well. My reliable old 2A battery charger (not a trickle charger) will frequently trip it's internal thermal breaker when I first hook it up to an Optima, and will often cycle the breaker a few times until things stabilize and it delivers a steady 2A like it's supposed to. I'll not leave it on this charger for more than an hour or two. If you disconnect the terminals on a fully charged battery, it should go for several weeks w/o losing its charge. Some batteries are better at this than others. Again, I've had good luck with Optimas going a long time w/o charging (2-3 months), and can be recovered with an hour on a normal charger at a low setting (1-2A). |
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