how long to charge a 110Ah battery

longwalks1

How long to charge a 110Ah 920CCA car battery with a 3.8A charger?


or is it not that simple?

BoGoF

Plug it in and see

alan_d

Really you should be using a 'smart' charger, which charges until it's full.
The time to charge will depend on how discharged it is, and what charging current the battery accepts - it could be an hour, it could be 24 hours...

jk0

Until it starts gassing rapidly, and the charge rate drops to about 2 Amps.

jimbo6977

I have one of these:

https://www.eurocarparts.com/ecp/p/car-accessories/summer-essentials/car-accessories/summer-essentials-deals/?553998750&0&cc5_1055&type=shopping&gclid=EAIaIQobChMIks-HgMbZ4AIV7ZztCh09XAzhEAQYASABEgKD1vD_BwE

and would recommend it.

longwalks1

Thanks all, jimbo6977 i have something similar, olny a cheap one from Lidl that shuts off after its fully charged.
Just need to move the car and wondered if there was away of working out how long it will take to charge, ill leave it and keep checking


Last questions guys I promise, is there an easy way of seeing how much charge the battery has once charged? (what i mean is if any damage is done, or if the battery is kn@ckered)

ElefantEd

110Ah / 3.8 A = 29 hours. But that assumes all sorts of things, including that it is starting from zero charge (unlikely) and that the charging current is actually constant. But it should give a reasonable estimate.

System

24hrs or so. Just done our 110Ah leisure battery from the caravan.

(what i mean is if any damage is done, or if the battery is kn@ckered)

If it isn't a leisure battery and has dropped below 11.5V before you charged it then it has internal damage. Whether or not that'll be an issue for you you can only find out by trying it. Use the car daily and you may never notice an issue until it spends a few days stood or it is a particularly cold night.

forgotmyname

The 3.8A charger is probably a smart one and it will be 3.8A with a dead battery and then cycle down to less than 0.5A so to fully charge it can take a long time.

jk0

britishboy wrote: »

Last questions guys I promise, is there an easy way of seeing how much charge the battery has once charged? (what i mean is if any damage is done, or if the battery is kn@ckered)

If it's not a sealed battery, you can use something like this:


https://www.amazon.co.uk/Draper-5010559617920-61792-Battery-Hydrometer/dp/B0001K9XSO/ref=sr_1_3?ie=UTF8&qid=1551203016&sr=8-3&keywords=hydrometer+battery


Just suck out a little electrolyte from each cell, note the reading, then return the electrolyte.

longwalks1

Thanks all, left it on charge on the car for 5 hours and she started first time. She had been sat and not used for 3 weeks prior to the battery going flat