12v 20a lead acid battery charging time?
 

Hi

I have got myself a 20a lead acid battery(golf trolley size) to use when I am at the track. I got myself a wall 500ma charger. I just wanted to know how long it will take to charge full from flat? I have been told by the seller that it will take around 30hours. I just want to confirm this as I feel abit uncomfortable leaving a battery charging for 30hours.

A 20A (should be 20Ah, amp hour, but it often get abbreviated to amp) has sufficient charge to deliver a 20A current for 1 hour or 10A for 2 hours, 0.5A for 40 hours, etc.

Therefore charging at 500mA (1/2 A) should theoretically take 40 hours (40A * 0.5h gives the 20Ah) but that is assuming the battery is completely flat.

So your advice was probably somewhere close.

I use my Orion Advantage Touch charger to charge mine. After a full days racing takes around 2 hours to charge fully. Rated the same as the one you have. Brilliant option to charge in the field!

What settings did you have your Orion charger on was it pb setting ?