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RizzleKicks

Active Member

• Dec 24, 2023

• #1

Evening Folks , got a query regarding by Discovery 2 car battery. Bought a YUASA around 1 year ago & if it’s not started at least once a fortnight and taken for a run it goes totally flat.

Now it is a fair size of battery and as it’s used only on weekends is this the cause for it going flat. Is there anything I can do to prevent this from happening time and time again.

I was advised to take it for a run , how long a run would be best for once a week ?

Having it idling stationary would that also charge the battery or not ?

Merry Christmas When It Comes.

 

Badger688

Well-Known Member

Full Member

• Dec 24, 2023

• #2

Sounds like you may have an earthing issue !!

I have left my battery in for 3 weeks before! (Forgot to unplug it before going to work) came back! Started straight away!!

If I know I'm going to be away for a week or two!! I will do 2 things?
Ask someone to start her for a few minutes!

Or unplug her!!

Kev

 

sierrafery

Well-Known Member

• Dec 24, 2023

• #3

Hi, OK it's Yuasa but what AH and CCA?, if it's the proper one you might have a quiescent current draw even though in two weeks unused if it was not fully charged before + cold outside it's not very strange to get weak. Buy a smart charger, you can't fully charge a weak battery with a short run or at idle unless you let it idle for few hours

 

MJI

Well-Known Member

• Dec 24, 2023

• #4

Short trips, low use, cold, kill them.

Charge for a few hours once a week or do

 

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tilly2

Well-Known Member

• Dec 26, 2023

• #5

+1 for the parasitic draw from SF. Do you you have a multimeter that can do DC current, to see what the vehicle is drawing off the batttery when not running, and ignition off ?

 

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RizzleKicks

Active Member

• Dec 26, 2023

• #6

I can purchase 1, what do I need to do with it as never used 1 before

 

kermit_rr

Very

Full Member

• Dec 26, 2023

• #7

It could well be damaged and not holding charge anymore.
Disconnect the battery and charge it up overnight. Disconnect the chamber and leave for an hour. Measure the voltage, what is it? Reconnect and start the engine. What is the voltage while the car is cranking? Should be around 11v.
What is the voltage when the car is running with everything on, heater fan, radio, lights, heated screens etc

 

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RizzleKicks

Active Member

• Dec 26, 2023

• #8

This is like a foreign language to me lol. Is there a video on how to do ?

 

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tilly2

Well-Known Member

• Dec 26, 2023

• #9

 

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RizzleKicks

Active Member

• Dec 27, 2023

• #10

Cheers Tilly

 

JUKE179r

Well-Known Member

• Dec 27, 2023

• #11

For automotive maintenance, always invest in a good clamp multimeter measuring both AC/DC amps & voltage, battery condition tester tool, a battery reconditioner/charger and a battery jump pack.

 

MJI

Well-Known Member

• Dec 27, 2023

• #12

I was able to recover a flat battery with a day long charge.

Lack of use and winter kills them.

Only took of charge today due to rain direction.

 

kermit_rr

Very

Full Member

• Dec 27, 2023

• #13

MJI said:

Lack of use and winter kills them.

Click to expand...

Plus the sulphation process starts at 12.4v