How long does it take to fully charge a new battery?

[vtchequers]

Bought a new Dynavolt 12v 12ah battery.
I'm using a Warrior 12v battery optimiser. the output is between 0.35 and 0.6A 12W (max).

I've had it on charge for about 14 hours and it's still on yellow, which indicates it's between 6 and 12 volts.
According to my battery and alternator tester it's on 5.0v!!

How long does it take for the things to charge?

[Krikkit]

Depending on the charge level, and what the charger does, 24-48 hours. Some of them will discharge the battery, condition it, then recharge it.

Using a multimeter on a disconnected battery won't yield a sensible voltage most of the time, as there's no load.

TL;DR: Wait a bit longer.

[trickywoo]

Ideally you would be charging 12Ah battery at 1/10 so 1.2 Amps. That should charge it in 10 hours.

Your 0.6 max Amps will take 20 hours + for efficiency losses.

[vtchequers]

I think I may have cocked it up! I originally filled it up (between lower and upper water level) with deionised water instead of the acid it came with.
After the first charging attempts I emptied the water out and replaced it with the acid it came with.
The battery does fully charge but eventually drops to bellow 11 volts, overnight.
Did using deionised water muck one of the cells up?

[Rubin215]

vtchequers said:

I think I may have cocked it up! I originally filled it up (between lower and upper water level) with deionised water instead of the acid it came with.
After the first charging attempts I emptied the water out and replaced it with the acid it came with.
The battery does fully charge but eventually drops to bellow 11 volts, overnight.
Did using deionised water muck one of the cells up?

You've killed it.

Contact the company you bought it from and tell them it doesn't work, but DON'T tell them what you've done...

[Piersman2]

vtchequers said:

I think I may have cocked it up! I originally filled it up (between lower and upper water level) with deionised water instead of the acid it came with.
After the first charging attempts I emptied the water out and replaced it with the acid it came with.
The battery does fully charge but eventually drops to bellow 11 volts, overnight.
Did using deionised water muck one of the cells up?

Er.... so just what did you think the acid that was delivered inside the box was for if not to fill the battery?

[moanthebairns]

Rubin215 said:

vtchequers said:

I think I may have cocked it up! I originally filled it up (between lower and upper water level) with deionised water instead of the acid it came with.
After the first charging attempts I emptied the water out and replaced it with the acid it came with.
The battery does fully charge but eventually drops to bellow 11 volts, overnight.
Did using deionised water muck one of the cells up?

You've killed it.

Contact the company you bought it from and tell them it doesn't work, but DON'T tell them what you've done...

Brilliant

[CarsOrBikes]

"I originally filled it up (between lower and upper water level) with deionised water instead of the acid it came with"

Why on earth would you do that?


Take the pill and buy another one, and do it properly.

After filling it with the acid supplied, leave it standing as recommended, iirc 12hrs, then put that on charge and leave it for at least 24 hours, conditioning a new battery correctly will reward you with longevity if not left to go flat.

[tivver500]

Buy a 'Motobatt' - they come pre-filled and with about 75% of full charge so just need an overnight trickle charge to have it ready to use the next morning (and they're superb batteries ).

[Gavia]

Aren’t batteries cheap as chips? I bought a couple for my XC last year and don’t think I broke a tenner.

[anonymous-user]

The has got to be the funniest "I'm a bloke, and I don't bother reading instructions" post ever

Batteries are what's called "Dry charged" in that the plates are charged in such a way that 'activation' with the acid is necessary to make them usable. Normally you can whack the acid in, let it fill, click the top cover on and chuck it straight on the bike.

You should be able to get a charge in the battery if you filled it with acid, but I'm guessing all of the distilled water didn't come out (it very rarely does as most batteries are 'flooded cell' and have some form of absorbent matting between the plates).

Buy a new one if you want a trouble free existence.

[vtchequers]

Gavia said:

Aren’t batteries cheap as chips? I bought a couple for my XC last year and don’t think I broke a tenner.

What cc bike was it for? the cheapest I found was the one I cocked up for £29.95

[Gavia]

vtchequers said:

What cc bike was it for? the cheapest I found was the one I cocked up for £29.95

250cc Enduro bike

[Momentofmadness]

Is it a YTX12BS? If so, sir needs one of these https://www.ebay.co.uk/itm/Powerline-YTX12-BS-YTX1... - £1 saving and comes ready to go, no need to add acid.

Or a 'used' Yuasa which still comes in the original packaging for £25.48 https://www.amazon.co.uk/gp/offer-listing/B002EH8Z...


Edit £19.95 including delivery http://www.squaredeals-ltd.co.uk/sprint-1050-05on-...