Suggestions for a SLA battery charger

[har297]

SLA battery charger

hi , i wanna charge a 12v 18Ah SLA battery , after googling i have settled with this circuit, is it ok, or please suggest any better option


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



thank you

 

[Dmitron]

SLA battery charger

this charger generate a lot of heat. but it simple.
SMPS on LM2673(for example) working better.

 

[kids78]

SLA battery charger

yes very good one. I tried it.

 

[har297]

Re: SLA battery charger

thank you ppl for the replies


as this circuit doesn't have automatic cutoff, is it ok if i leave the charger connected ALWAYS.
or can you please suggest a circuit with automatic cutoff

 

[Andy G]

Re: SLA battery charger

a battery must be charged with 1/10 of its AH value
so18 divided by 10 comes to 1.8 amps
LM317 has a 1.5 amps output so it is not advisable to use this circuit as it will run overheated and fail
better to use the LM350 circuit which has a 3 amps rating

 

[Dmitron]

Re: SLA battery charger

thank you ppl for the replies


as this circuit doesn't have automatic cutoff, is it ok if i leave the charger connected ALWAYS.
or can you please suggest a circuit with automatic cutoff

Use stend-by mode of charging. This way you can leave the charger connected ALWAYS

 

[Andy G]

Re: SLA battery charger

try this circuit, it will float charge the battery also
**broken link removed**

 

[Tahmid]

SLA battery charger

Hi,
These are from Tony Van Roon's site. His circuits are usually quite reliable:

http://www.sentex.ca/~mec1995/gadgets/labc2.htm
**broken link removed**
**broken link removed**
**broken link removed**

Hope this helps.
Tahmid.