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Offline Kobus

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Battery chargers
« on: June 03, 2020, 08:25:48 pm »
Non brand specific.

So all these chargers range from 1 Amp to 3 Amp and higher.

For keeping a battery "conditioned" , is there any reason to go higher than 1 Amp?

Any other things to consider?

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Offline GeenSand

Re: Battery chargers
« Reply #1 on: June 03, 2020, 08:37:20 pm »
Depends on battery size. Bike battery is fine with 1 amp, but if you want to use it on your car/bakkie aleast 5amp will be needed.
I have a 0.8amp (ctek m300 starter)one on my bike, but its ok for keeping it topped up. After awhile comuting short ends i use a normal 6amp car charger to help it. I can hear quite an improvement in cranking speed after using the bigger one. So i will be getting a bigger smart charger if mine gives up.

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« Last Edit: June 03, 2020, 08:40:34 pm by GeenSand »
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Offline Kobus

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Re: Battery chargers
« Reply #2 on: June 03, 2020, 08:43:58 pm »
So is there a negative in having a bigger one, like 3amp; for continuous charging?
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Offline PapaDragon

Re: Battery chargers
« Reply #3 on: June 03, 2020, 08:50:53 pm »
 :sip:
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Offline GeenSand

Re: Battery chargers
« Reply #4 on: June 03, 2020, 09:41:02 pm »
The reason for smart chargers over normal chargers is normal chargers gives a continuous current that can cause batteries to dry out (boiled dry) over time and be damaged/overcharged. Where as the smart charger can minimize the output current so not to damage the battery when fully charged(float charging).That way you can leave it on the battery for months it switches on and off as needed to keep the battery fully charged. For the maintance part of it they use diffrent charging voltages and currents to desulfate ect.

Charger size depends mainly on battery size. (From ctek site)
0.8 amp up to 32ah
5.0 amp up to 120ah.
To sum it up the small charger will take longer to charge a depleted battery of the same size than the bigger one will.
You can charge small batteries with a big charger but not big batteries with a small one. Bigger one can do bakkie and bike where the smaller ones can only do bikes.

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Offline Manic

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Re: Battery chargers
« Reply #5 on: June 03, 2020, 09:52:40 pm »
I have only Cteks
 
The 0.8 kak to get a decent battery full. If you connect it onto a car battery, they get hot as hell.

The 3.8 one works like a bomb. Car and bike.

The 5.0 one charges a big Hilux battery in no time and even works on a truck battery  :thumleft:

Running 12 Cteks at the moment, I think they are awesome  :drif:
 

Offline Colin Kaapschehoop

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Re: Battery chargers
« Reply #6 on: June 03, 2020, 11:07:27 pm »
I agree, the “smart” cteks will help bring a dead battery back to life and extend battery life, especially the life of the crap SA Automotive batteries! Ever noticed how they fail just after the guarantee has lapsed?
 

Offline Edgar

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Re: Battery chargers
« Reply #7 on: June 04, 2020, 09:37:02 am »
I am looking at a OptiMate 5 charger. Are they also good?
 

Offline lukestrugnell

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Re: Battery chargers
« Reply #8 on: June 04, 2020, 09:43:33 am »
I am looking at a OptiMate 5 charger. Are they also good?
Very good, I run 2 of them and they great.

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Offline Superboet

Re: Battery chargers
« Reply #9 on: June 04, 2020, 10:24:37 am »
I am looking at a OptiMate 5 charger. Are they also good?

Optimate also very good. I got one with "can bus" mode specifically designed for a motorcycle like the 1200GS.
 
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Offline SmuGS

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Re: Battery chargers
« Reply #10 on: June 04, 2020, 11:11:23 am »
I am looking at a OptiMate 5 charger. Are they also good?

I had an Optimate 5 and it stopped working just after 2 years. Cannot be repaired as the chip that fried could not be found. Bought a National Luna with a 5 year guarantee and never looked back..

https://www.outdoorwarehouse.co.za/product/national-luna-battery-charger/6980
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Offline Smoky

Re: Battery chargers
« Reply #11 on: June 04, 2020, 11:50:34 am »
I have Optimate 3 that is more than 5 years old that is used for alarm batteries up to a car battery. I also have an Optimate 6 that I use for everything including my 220 amp solar battery.
 

Offline jaybiker

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Re: Battery chargers
« Reply #12 on: June 04, 2020, 12:06:34 pm »
Don't know why life has to get so bloody complicated. The only charger that I had for about 52 years was given to me by a girlfriend who got it with her Green Shield stamps.

(Who remembers them?  :biggrin:)

When it packed up a couple of years ago, I replaced it with the cheapest jobbie from Midas. Don't know how many amps it is, there's mo meter or settings. It's got a red clip and a black clip.
Connect 'em right way round, plug in and it charges. Works OK.  :thumleft:
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Offline Manic

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Re: Battery chargers
« Reply #13 on: June 04, 2020, 12:46:51 pm »
I am looking at a OptiMate 5 charger. Are they also good?

I have 1 Optimate here. Tried it out.

Connected it to my bike battery, took it 10 min to show battery is full. Touched teh battery and it was warm.

Waited a few hours, connected the Ctek on it, took 4 hours to show its full, and the battery was cold throughout.

Optimate not for me thanks.
 

Offline Manic

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Re: Battery chargers
« Reply #14 on: June 04, 2020, 12:55:04 pm »
Fast charge kills any battery.

There is a reason why the one cost R600 and the other R1600  :deal:
 

Offline Kobus

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Re: Battery chargers
« Reply #15 on: June 04, 2020, 05:24:04 pm »
New Harley.
Dont know battery capacity.

Optimate 5 @ 2.8 amps or
Optimate 3 @ .8 amps

help
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Offline lukestrugnell

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Re: Battery chargers
« Reply #16 on: June 04, 2020, 05:29:40 pm »
New Harley.
Dont know battery capacity.

Optimate 5 @ 2.8 amps or
Optimate 3 @ .8 amps

help
Get the optimate 4. Up to 50AH....your bike will be 9ah or something close to that.

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Offline Manic

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Re: Battery chargers
« Reply #17 on: June 04, 2020, 06:33:55 pm »
New Harley.
Dont know battery capacity.

Optimate 5 @ 2.8 amps or
Optimate 3 @ .8 amps

help

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Offline Sláinte Mhaith

Re: Battery chargers
« Reply #18 on: June 04, 2020, 07:19:29 pm »
Non brand specific.

So all these chargers range from 1 Amp to 3 Amp and higher.

For keeping a battery "conditioned" , is there any reason to go higher than 1 Amp?

Any other things to consider?

You can use a small size on a big battery.  It just takes longer to charge. Mine is less than 0.9Amp and works fine on the bakkie battery.  Will take a while to charge if it is really flat though.

A big size charger will also work as long as they can step down the amps.  Larger amp chargers are normally just more expensive.

Mine keeps charging at max amps and steps up the voltage until it reached a specific voltage and then it starts stepping down the amps.


Other things to consider:  Look at the functions of the charger. Some can do pulse charging for desulphation (or something like that).  Others have functions to recover a battery with too low a voltage.
 

Offline Sláinte Mhaith

Re: Battery chargers
« Reply #19 on: June 04, 2020, 07:21:34 pm »
Like so: