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View Full Version : how to charge a battery using a SMPS????



samurai_01
01-22-2010, 08:57 PM
I have got a SMPS supplying 12v dc.....
the battery charger also supplies 12v dc,so is it possible to charge a battery( LEAD ACID-12V) using a SMPS??

if possible......then how can we charge ????

Ulhas
01-23-2010, 08:43 PM
go through
http://www.quasarelectronics.com/batteries-chargers.htm#Battery-Chargers

samurai_01
01-25-2010, 12:04 PM
i have 12 V 7AH sealed lead acid batteries that i bought 1 year earlier. now the batteries are giving outputs as low as 5 volts. moreover people sell those chargers with transformers in them at 300-350Rs but i feel like they are cheating. I used to charge the batteries using them but their conditon still detoriated.Please help me to recover the batteries i dont have much money to buy new ones.
Also suggest me the best charger that i can buy for these batteries?I need help for my batteries urgently or else testing of my robots wont start.

AVnetics
01-28-2010, 12:57 PM
Here is a simple circuit

http://www.uncommonprojects.com/uplog/2008/10/22/solar-charging-a-nokia-n95/

change the R1 and R2 to make the output 12V use the calculator :
http://www.electronics-lab.com/articles/LM317/

I feel that the battery is dieing, better use a good battery original SUNCA ... (u need experiance to find real one) ... exide may have better ones in automobile
shop.. if u use in table light etc . better go for Nicd battery .. made by eveready (make a pack )...

Ulhas
01-28-2010, 09:18 PM
See this

http://www.circuitstoday.com/lead-acid-battery-charger