Charging a lead/acid battery

[kidthorazine]

I want to charge a 12v lead/acid battery using a wallwort. I have various wallworts with different voltages/milamps. I have a bunch of 12v ones with mAs ranging from 500ma to 2.5 amps. I also have a 15v 850ma one and an 18v 1000ma one. What would be best to go with?

 

[davenn]

that would depend on the rating of the battery .... what is it A/hr rating?

Dave

 

[kidthorazine]

that would depend on the rating of the battery .... what is it A/hr rating?

Dave

Theres no way to know its sealed inside case. Its a car jump-start pak

 

[(*steve*)]

What does it weigh? A lead acid battery's weight is very closely correlated with its capacity.

e.g. a 7Ah SLA battery is around 2.2kg. So you're looking at about 300g per Ah for a 12V battery. (that is confirmed by looking at an 18Ah battery and 38Ah battery.)

Note that it is higher for deep cycle batteries (up to 350g/Ah) but it's still pretty close.