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charging lead acid batteries
On Friday, November 6, 1992 at 12:55:57 PM UTC-8, James W Gourgoutis wrote:
I want to buy a 12 volt, 3 amp-hour lead acid battery to use in a lighting system that I am building. Following the 1/10th rule, I need to use a charger that delivers 300 milliamps. I have a wall converter that is rated at 300 milliamps & 12 volts. Can I use this to charge the battery? What is involved with doing this? Do I have to guess at the charge time, or is there some way that I can calculate this? Can I use this power source as a trickle charger? Any info would be helpful, since I will base my battery purchase on this info. Thanks! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= James Gourgoutis Mechanical Engineering O University of Pittsburgh _ /__, e-mail me at: (_) /(_) or Thanks! "Why am I so late? It took me 25 minutes to decide which bike to ride!" -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -- Buy a charger that turns off when the battery is fully charged. One of Harbor Freight's 400mA float chargers is fine and they often are on sale for under $5 https://www.harborfreight.com/automotive-motorcycle/battery/automatic-battery-float-charger-42292.html But you're probably better off with a Li-Ion set up. Use 4 protected 18650 cells in series with a 14.4V Li-Ion charger. A little more expensive than SLA, but much more energy dense. |
charging lead acid batteries
On 11/8/2017 1:54 PM, SMS wrote:
On Friday, November 6, 1992 at 12:55:57 PM UTC-8, James W Gourgoutis wrote: I want to buy a 12 volt, 3 amp-hour lead acid battery to use in a lighting system that I am building. Following the 1/10th rule, I need to use a charger that delivers 300 milliamps. I have a wall converter that is rated at 300 milliamps & 12 volts. Can I use this to charge the battery? What is involved with doing this? Do I have to guess at the charge time, or is there some way that I can calculate this? Can I use this power source as a trickle charger? Any info would be helpful, since I will base my battery purchase on this info. Thanks! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= James Gourgoutis Mechanical Engineering O University of Pittsburgh _ /__, e-mail me at: (_) /(_) or Thanks! "Why am I so late? It took me 25 minutes to decide which bike to ride!" -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -- Buy a charger that turns off when the battery is fully charged. One of Harbor Freight's 400mA float chargers is fine and they often are on sale for under $5 https://www.harborfreight.com/automotive-motorcycle/battery/automatic-battery-float-charger-42292.html But you're probably better off with a Li-Ion set up. Use 4 protected 18650 cells in series with a 14.4V Li-Ion charger. A little more expensive than SLA, but much more energy dense. Maybe someone can buy one of those float chargers and ship it back to James in 1992. -- - Frank Krygowski |
charging lead acid batteries
On Wednesday, November 8, 2017 at 1:54:13 PM UTC-5, SMS wrote:
On Friday, November 6, 1992 at 12:55:57 PM UTC-8, James W Gourgoutis wrote: I want to buy a 12 volt, 3 amp-hour lead acid battery to use in a lighting system that I am building. Following the 1/10th rule, I need to use a charger that delivers 300 milliamps. I have a wall converter that is rated at 300 milliamps & 12 volts. Can I use this to charge the battery? What is involved with doing this? Do I have to guess at the charge time, or is there some way that I can calculate this? Can I use this power source as a trickle charger? Any info would be helpful, since I will base my battery purchase on this info. Thanks! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= James Gourgoutis Mechanical Engineering O University of Pittsburgh _ /__, e-mail me at: (_) /(_) or Thanks! "Why am I so late? It took me 25 minutes to decide which bike to ride!" -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -- Buy a charger that turns off when the battery is fully charged. One of Harbor Freight's 400mA float chargers is fine and they often are on sale for under $5 https://www.harborfreight.com/automotive-motorcycle/battery/automatic-battery-float-charger-42292.html But you're probably better off with a Li-Ion set up. Use 4 protected 18650 cells in series with a 14.4V Li-Ion charger. A little more expensive than SLA, but much more energy dense. In the 25 years since the original post he's probably figured something out. Just love these ressurected Zombie threads. Cheers |
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