Good battery, Sluggish start

[crreed67]

I have a 2022 Cub Cadet Pro Z 960s KW not a year old yet with 58 hrs on it. Always garage kept. After sitting for a week or so between mows it acts like the battery is low or bad and is hard to turn over. Once it stars everything runs just fine. I can then turn it off for a bit, a few hours or so and it starts just great. It's after it sits for a few days is when it starts acting like it's got a dying battery. I've checked for a parasitic drain and found none and checked the battery voltage after a week of sitting and it is at 12.8V not running. What else am I missing or what should I check next.

 

[5030]

Load test the starting battery with a carbon pile load tester and report back... Me thinks you have a bad battery. 12.8 volts is basically low.

 

[2manyrocks]

My guess is it has a lawn mower sized battery that sat over the winter and now the battery is shot. You may want to invest in a battery maintainer charger for next winter. I keep mine charged with a 12v solar panel system. Saves on having to replace batteries and my battery is always charged.

 

[5030]

If you fully charge the lawnmower battery and then take it out of circuit (remove the negative terminal), the battery will be fine in the spring. I do that with my farm tractors that sit all winter in the barn and the lawn mowers as well.

Flooded cell batteries typically loose about 5% of the total charge from parasitic loss monthly.

 

[crreed67]

I've never had one do this over the winter before, especially being less than a year old. Could be though. I'll give it a load test and report back. Be a couple of days though. They're calling for light snow here tomorrow morning so I'll give it a day or three to warm back up.

 

[dodge man]

I agree, load test it.

 

[grsthegreat]

If it passes an actual load test, add a battery disconnect switch on battery.

 

[5030]

If it passes an actual load test, add a battery disconnect switch on battery.

What I use on everything.

 

[LittleBill21]

Load test the starting battery with a carbon pile load tester and report back... Me thinks you have a bad battery. 12.8 volts is basically low.

12.7 is a fully charged battery if sitting with no charge.... no idea why you think 12.8 is a low battery

 

[LD1]

12.7 is a fully charged battery if sitting with no charge.... no idea why you think 12.8 is a low battery

Agree