![]() ![]() ![]() However with LFP batteries the controller shuts down the blades AND the drive motors simultaneously.Ĥ. Similarly, the controller is tuned to turn off the blades at 48v and allow enough remaining power to get the mower back to the barn. The LFP battery pack reaches 54.5 after a full charge, but that exceeds the controller specifications and it won't turn on. A four-pack of those would work great and provide extended run-time, but the mower's controller won't let the machine start with voltage exceeding 52.5V. Regarding replacement batteries, I did try replacing the OEM batteries with LiFePO4. Sometimes I might get an hour from a "100%" charge, depending on how tall the grass is.ģ. Regardless of what the display indicates (70% or 100%), I seldom get more than 45 minutes of run-time from it. If simply charged overnight, it displays 100%.Ģ. I see the same 70% charge on my Ryobi mower if leaving it on the charger for more than 48 hours. After replacement, the mower runs better than when new.Ĭommenting on several points presented in related posts:ġ. I took mine to a local battery shop for load testing and they found one to be failing. Many people have replaced all four batteries because they didn’t test them individually. ![]() Ryobi’s procedure is to fully charge all four batteries and put a load test on each to determine if one or more have failed. If it has dropped a lot (the system shuts down when the voltage drops below 36 volts), you likely have a weak or failed battery (I.e. Then turn the key on and turn on the headlights. Then measure the pack voltage at the bottom two contacts of the charging port. Based on my experience and from working with Ryobi support, the first thing I would do is fully charge the battery pack to when the charging lights on the charger and the mower glow steady green. Some users have even had the meters replaced under warranty with no improvement. The ZT480s have been described by many as not reporting the charge % accurately. The instrumentation on the Ryobi’s is known to be variably inaccurate. I found my way hear searching if this was an issue anyone else was having. Hey PaulNY! I'm having the same issue with the 70%. I have been using the battery down to 10% on the morning mow (I now realize I should not do this as I read the article from about not taking the battery down to less than 20%).Īnyone else have a similar issue with the batteries or have suggestions? Thanks for your input. ![]() Plug in the mower for a few hours and then mow in the afternoon. She stated they had never heard of the problem before. I called Ryobi about the problem, but their response was that it shouldn't be happening and the representative I spoke with did not believe me. waited a minute, and then plugged it back in for 10 minutes the battery would then show 100% charge. Since it has been charging all week, it should be at 100%. When I get ready to mow, I check the battery level. I mow once a week and keep the mower plugged in whenever it is not in use. Note: I fully charged it before I used it the first time. In the first year I more than paid for it in comparison to what I paid a landscaping company the year before.Īlmost from the beginning I have had an issue with the battery. It s a fantastic mower and well worth the price. I have a Ryobi ZT480e that I bought last year. ![]()
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