[Ryobi battery riding lawn mower]

Last year I bought 4 new batteries.   I made sure to charge them and kept my mower in in the garage on the charger during the winter.

Now the gauge only goes to about 1/4th charged and when the mower lasted only a few minutes before it stopped mowing.

 

I have to believe the batteries are OK.  Could this be the charger, or gauge or something else?  Any ideas?

[Ryobi battery riding lawn mower]

1 hour ago, TotalRex said:

I replaced a bad battery with a new one, but I am getting the same results.  The mower runs for few minutes then stops moving.  If I lift off the pedal it moves again for a few feet than stops.  Then the blades turn off.   I can then drive it back to the garage but only slowly.  If I push all the way down on the pedal it goes for a few feet then stops. 

 

WilI need to replace all the batteries?  Or should I try one more?

My tester says the other 3 batteries rate at ~380-400 CCA if that helps.  The new battery says ~500. 

 

An update.  I had a 2nd new battery and so I replaced a 2nd old one (long story HD sent me an order I cancelled).  I guess that raised the total power to be enough to run the mower.   I was able to mow the front lawn without it stopping this time.   I am going to fully charge it again and try my back yard which is a little over 1/3rd of an acre.

 

Question, I read to wait until batteries cool down before recharging.  Is that true?

[Ryobi battery riding lawn mower]

I replaced a bad battery with a new one, but I am getting the same results.  The mower runs for few minutes then stops moving.  If I lift off the pedal it moves again for a few feet than stops.  Then the blades turn off.   I can then drive it back to the garage but only slowly.  If I push all the way down on the pedal it goes for a few feet then stops. 

 

WilI need to replace all the batteries?  Or should I try one more?

My tester says the other 3 batteries rate at ~380-400 CCA if that helps.  The new battery says ~500. 

[Ryobi battery riding lawn mower]

HELP,

Anyone know who has a replacement battery for the RM480e in stock?  Home Depot's site says they do, but I ordered one two weeks ago and they keep emailing me that shipping is delayed.  They do not have them in stock.

 

I just need one right now.  One of my batteries is dead according my tester while the are 3 are 'OK'

[Ryobi battery riding lawn mower]

On 5/22/2022 at 5:05 PM, sailracer said:

Here's what I found with the battery tester I linked above.

 

It appears to measure the CCA and determine the health of the battery based solely on that.  It uses the number you give it for a target CCA to tell you the battery state of health.  I'm not sure what the CCA should be for a good Leoch 75Ah battery since that isn't how deep cycle batteries are spec'd.  Does anyone know what a good vs. bad battery will typically read for CCA?

 

All 4 of my batteries measured between 13.06 and 13.12 V when fully charged and removed from the system.  I got the following for CCA on each

Batt 1: 466A

Batt 2: 474A

Batt 3: 536A

Batt 4: 527A

 

This would seem to suggest two of the batteries (the two towards the back of the mower) are weaker.  Does it mean they are bad, though?

 

I am having the issue where the mower shuts down the blades and even stops forward power when moving in forward.   

3 of my batteries rated ~440 and one was only 26.  That is likely my problem.

 

I too wonder what a good CCA rating is.   My mower is 5 years old.  I am debating on how many batteries to replace.  I know at least one.    I am using a car battery charger to recondition one to see of that helps.