Author Topic: Charging Mazda 3 Battery  (Read 5269 times)

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Offline gtmazda3

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Charging Mazda 3 Battery
« on: February 20, 2016, 10:15:09 AM »
I left my Gen. 2 Mazda 3 for 8 days in the cold weather and the car now won't start. This seems like a relatively short time for it to go dead in and the I hadn't left anything on of plugged in except the wiper stalk was left in the on position.

In terms of charging the actual battery, do I need to disconnect it from the car first, and if so will I have to re-enter any security or radio codes, or is it possible to charge the battery while its still connected to the car?

Thanks for any advice

Offline Willpower

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Re: Charging Mazda 3 Battery
« Reply #1 on: February 20, 2016, 11:35:16 AM »
Provided you use a commercially available battery charging device, then there is no real need to disconnect from the car.

If you do still decide to disconnect the car then there is the possibility that you may have to enter a radio code. 

Let me qualify that a little.  If you have owned the car from new and you yourself have not entered a code,  then you will not need a radio code and everything should be OK.
If however you are the second or subsequent owner, there is the remote possibility the a previous owner has entered an anti theft code.  What happens next will depend upon these facts.

If you ultimately find that you do need a code, then please contact me by PM. There are ways around this situation, but it is not something that we publish on an open website.  (There are some dodgy people around)   ;)

As for the reason for the dead battery, It has become fairly common on this forum to discover that the battery might only be fully serviceable for around 5/6 years. As your car is around that age, it might be worth your while going into a battery specialist and have them do a battery drop test. It might be the right time to get a new one

Hoping all goes well for you.

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Offline gtmazda3

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Re: Charging Mazda 3 Battery
« Reply #2 on: February 20, 2016, 12:06:39 PM »
Thanks for the informative reply!

I have had the car second hand for almost two years now and as far as I know it is still the original battery. I searched the user handbook and car paperwork but have been unable to find any details regarding radio or security codes.

I have a 'Challenge' Battery Charger, which I am unable to find the user manual for but previously on older cars I have had, I used to just attach the leads to the car while the battery was still connected, although I was unsure if this was technically safe to do so with the Mazda.

I'll charge the battery for now so the car is available for me to use, but will probably replace the battery very soon as I don't want the hassle of having the battery go dead more often. I'll probably change the battery myself so will search for more info about my car regarding codes etc.

The car was serviced by Mazda a couple of months ago so I thought they might have check the battery then but it's not something i specifically asked them to do at the time.



Offline Willpower

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Re: Charging Mazda 3 Battery
« Reply #3 on: February 20, 2016, 01:30:35 PM »
The car was serviced by Mazda a couple of months ago so I thought they might have check the battery then but it's not something i specifically asked them to do at the time.

There is nothing specific in the servicing schedule, that requires a battery condition check.  Batteries are considered to be "consumables" and are never scrutinised unless they exhibit a problem.
 
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Offline speedy mazda

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Re: Charging Mazda 3 Battery
« Reply #4 on: February 20, 2016, 06:24:55 PM »
hi willpower the scheduled maintenance for my mazda 3 says inspect electrolyte level and specific gravity for every service.
I recently topped up my battery and noticed pink grease on terminals so I guess my dealer had lifted lid checked battery last march service.They seem to like pink grease all earth terminals on front struts were greased too last time, hinges etc.

Offline speedy mazda

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Re: Charging Mazda 3 Battery
« Reply #5 on: February 20, 2016, 06:33:57 PM »
hi gt mazda3 the aa do a battery conditioner which you can charge the battery on the car.
I had the same problem as you had the aa out and they tested the battery which was just discharged but in good condition,thats when he showed me the charger on van.He told me to just leave it running  charge it up  which I did no problems since.make sure you check distilled water levels in battery manual tells you in detail how to top up the  battery

Offline gtmazda3

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Re: Charging Mazda 3 Battery
« Reply #6 on: February 20, 2016, 08:01:05 PM »
Hi speedy mazda, thanks for the reply.

I am with the AA and considered calling them out but I didn't fancy paying £100 for a battery from them, and as the battery could be over 6 years old I wanted to replace it anyway.

I bought a new battery from Euro car parts today for about £60 and was going to fit it once I'd rang Mazda about radio and security codes etc but it might be worth asking the AA to check the battery anyway as I don't know for sure how old the battery is or what condition its in and then take the new one back if turns out to be OK.

Although, despite the cold weather and using lights and heating on short journeys recently, I thought the battery would be able to hold its charge for longer than a week.


Offline speedy mazda

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Re: Charging Mazda 3 Battery
« Reply #7 on: February 20, 2016, 09:03:03 PM »
hi gtmazda I must say the aa put a tester on my battery run tests then jump started the car then run test again then printed out results.he did not try to sell me a battery infact he said they don't carry my battery as its funny size lol.if your battery is clear black top with star shaped filler holes its original one I suspect.

Offline Willpower

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Re: Charging Mazda 3 Battery
« Reply #8 on: February 20, 2016, 09:14:06 PM »
.......... the scheduled maintenance for my mazda 3 says inspect electrolyte level and specific gravity for every service.

You're probably quite right and likely an addition for the Gen 2 onwards.  I stand corrected..... but checking the electrolyte level, spg and putting a bit of grease on the terminals, does not in my view qualify as a voltage drop test.    To do a voltage drop test, you create a load in the circuit that's being tested. Then you use a digital volt meter to measure the voltage drop across the live connection while it is under the load. 

Personally I wouldn't be confident that the mechanic would take the time to do that on every service.
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Offline speedy mazda

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Re: Charging Mazda 3 Battery
« Reply #9 on: February 20, 2016, 09:42:15 PM »
It  does not mention a voltage drop test in schedule so I don't think they would do it on service, but then it does say   inspect electrolyte level and specific gravity for every service which should say the state of charge at least. I was just saying willpower that at least they had been in the battery box as the terminals had fresh grease on, whether they had got there hydrometer out is another thing .

Offline gtmazda3

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Re: Charging Mazda 3 Battery
« Reply #10 on: February 20, 2016, 11:24:24 PM »
I think they at most just looked at my battery during my service as there was no sign of grease on the terminals but I may be wrong.

I also had an issue when asking them to top up the coolant level slightly as I wanted them to used the special pre-mixed Mazda coolant but they went ahead and just used water. Bit disappointed, especially as I was misled about a couple of things when buying the car at the Mazda dealer.


Separately, I've searched high and low but can't seem to find an answer... Replacing the actual battery itself is simple enough, but in terms of the car electrics, is there anything to bear in mind other than the radio code might need re-entering or that could go wrong with the electrics?
The car is factory-standard in terms of alarms and has no sat-nav I just am nervous when it comes to more modern cars and messing around with their electrics.





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Re: Charging Mazda 3 Battery
« Reply #10 on: February 20, 2016, 11:24:24 PM »