glennfin

That's great news about the MAX battery!,,,, I will be changing all the batteries and there will be considerable savings if I go with the MM's. Did you have any issues with charging? Also, did you pre -charge the MM before you installed it? I'm assuming you did..

I'm pretty sure there's a Youtube video that covers removal of the tray. ...Also check the Roybi website for the service manual download.

Finally found this thread after hours of exhaustive online research... Jim, I've read through the entire thread and I must say, your posts are gold! I am grateful that you've followed up to date with this valuable information that i couldn't seem to find anywhere else. I've had my ZT480E now for, I believe this is the 5th season of mowing. I believe it's the 75AH model. ....same battery issues that others have reported, 50% / 70%, can only mow for about 20 mins right now. Mower is always stored in heated garage on the Roybi charger, etc etc. Considering the age of the mower/batteries, I will most likely be replacing the pack very soon. I understand your advise about individually load testing each battery to find a bad one, but I have to consider the chances of another battery in the pack going bad after not so much time which brings me to my fist hurdle/question....... From the photo you posted, I see you've built a wood riser on top of a dolly to help removing the battery tray. Are you able to slide the tray right onto the riser from the mower without having to do any lifting?.. This will be a must for me before I can consider anything else. Any info on that would be greatly appreciated. I have a dolly that would work, with locking wheels. Finally, The current price for Leoch LPC12-100 from HD is $239.20. The current price for the Mightymax ML100-12 from HD is $185.39 Amazon has the Mightymax ML100-12 w/free shipping (prime) for $179.99 Do I take a chance with the Mightymax?... that is a considerable price difference considering 4 batteries. Glenn