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I was going to purchase an SLA battery that I intend to recharge whenever it runs out,
and I was hoping someone could tell me if I'm buying the right components, and if there is anything I should watch out for when recharging them.
I was going to buy this 12V, 7Ah battery and charge it with this charger which I think connects to the battery with these connectors.
I have never charged a battery like this before, and I was hoping someone could tell me if I have chosen an incorrect piece of equipment or if there are any dangers or anything I should be aware of.
(Thank you to Soeren for the help me gave me in my previous thread!)
Hi! For a 12V 7amp,a 0.8 charger is enough, but it will take 7 hours. You can use smart charger like a CTEK, wich has a disulphation cycle for a longer life.SLA hate being completely flat, they can last up to half the time, wich is about 7 years normally.Use a permanent connention to the battery and use an other connector far away from it. Always pull the power cord from the plug before connecting the charger to the battery to avoid sparks...And explosion!SLA looses 25% of capacity every 6 month with normal temperature
Hi! For a 12V 7amp,a 0.8 charger is enough,
I would really like to see what you built for your friend. If you think it might lead to a safer and more efficient way of charging the SLA battery, I'll try my best to mimic whatever you did. I really appreciate your help!
If the plates have sulphation then the battery will not take a full charge so I believe desulphation should be done first. It can help in extending a batteries life and works if the sulphation is not too extreme.
Hi,Quote from: Hal_Emmerich on September 23, 2010, 03:35:59 PMI would really like to see what you built for your friend. If you think it might lead to a safer and more efficient way of charging the SLA battery, I'll try my best to mimic whatever you did. I really appreciate your help! The circuit, updated to 7Ah as well, is hereIf your relay are different, I can change the PCB to match (if you give me the details).The regulator should have a transfer heat sink mounted between the PCB and the regulator itself.Any questions about it?
Hi! For a 12V 7amp,a 0.8 charger is enough, but it will take 7 hours. You can use smart charger like a CTEK, wich has a disulphation cycle for a longer life.
I am no good at PCB design (I barely even have experience soldering!), but having a schematic like this helps me immensely. Thank you again, Soeren!
Hi,Quote from: Hal_Emmerich on September 25, 2010, 06:59:45 PMI am no good at PCB design (I barely even have experience soldering!), but having a schematic like this helps me immensely. Thank you again, Soeren! You're welcome If you build it on perf-board or similar, keep the contact(s) of the relay and the "go-switch" (if auto-off is used) a long way from the low voltage parts and make sure they're not able to short something even if a lead break loose!The first and foremost rule of construction is: Don't get killed!
I' m using a CTEK 0.8 amp on a 12v 12Amp/h power-sonic for 6 years now, for 2 lights and a water pump, and it's still ok. Now I'm scared it lets me go any minute!
Well, it takes about 5 hours to charge, but I never wait untill its flat before I charge it.