Lower AH battery charger bigger battery

celica1994

ok so car battery went flat,

have bran new charger in the box to find out it only supports a 60ah battery, my car battery is 100ah.... if i leave it over night will it charge it or is there no hope?

smuggler.ie

celica1994 wrote: »

ok so car battery went flat,

have bran new charger in the box to find out it only supports a 60ah battery, my car battery is 100ah.... if i leave it over night will it charge it or is there no hope?

It will.
To complete charge it'll take longer, but its better that "to fast"(good chargers have protections build in)
I guess your charger is rated ~4.5-6.5A - to fully charge 100Ah battery from flat it will probably require at least ~20h-24h.
Its not perfect, but should start car if just "overnight".
https://www.halfords.ie/motoring/buying-guides/car-battery-chargers-buyers-guide.html
https://www.batterystuff.com/kb/articles/charging-articles/how-do-i-pick-a-battery-charger.html

Edit: if car is parked for prolonged periods(>= 3weeks), disconnect battery from terminals to prevent battery drain.

celica1994

smuggler.ie wrote: »

It will.
To complete charge it'll take longer, but its better that "to fast"(good chargers have protections build in)
I guess your charger is rated ~4.5-6.5A - to fully charge 100Ah battery from flat it will probably require at least ~20h-24h.
Its not perfect, but should start car if just "overnight".
https://www.halfords.ie/motoring/buying-guides/car-battery-chargers-buyers-guide.html
https://www.batterystuff.com/kb/articles/charging-articles/how-do-i-pick-a-battery-charger.html

Edit: if car is parked for prolonged periods(>= 3weeks), disconnect battery from terminals to prevent battery drain.

cheer for the reply, downside is i have 10 hours till work, so im kinda hoping its enough to just get the car going as the battery isnt fully flat just wouldnt turn over, i have a jumper pack there on charge too to add to it in the morning

celica1994

i got 10 hours till work the battery wasnt fully dead just wouldnt turn over so hoping it gives it enough to get it started in the morning, i have a jumper pack there too

celica1994

fully charged this morning, so anyone who needs to know for future reference lol

Cerco

smuggler.ie wrote: »

Edit: if car is parked for prolonged periods(>= 3weeks), disconnect battery from terminals to prevent battery drain.

I would advise against this for modern cars. You could well end up with bigger problems than a soft battery. Modern car electronics don’t respond well to battery disconnection.
Best to trickle charge occasionally during prolonged park ups.

smuggler.ie

Cerco wrote: »

I would advise against this for modern cars. You could well end up with bigger problems than a soft battery. Modern car electronics don’t respond well to battery disconnection.
Best to trickle charge occasionally during prolonged park ups.

You right re modern, "severely computerized" cars, but for what it worth, we don't even know what car it is...