Gartenmeister

Well, now my mower won't drive. Blades and lights work for whatever that's worth. It makes ONE beep when I close the control levers and it won't move, forward or reverse. The diagnostic code chart in the service manual says one beep has to do with "angle sensors" but there is no reference to angle sensors anywhere else in the document. Any ideas?

Is it current consensus that the Mighty Max ML100-12 is the best value in replacement battery? $179.99 at HD, $1 more at Lowes but Lowes' card gives a discount. Thinking of ordering 4 as my mower runs for about 5 minutes cleaning up leaves.

@SuperDave733 if you want to convert to Lithium you are probably better off checking out this thread. Be prepared, it will be a long read. In a nutshell it appears that guys are doing it but it is fairly expensive and is an in-depth DIY project that requires fairly advanced skills/knowledge. I believe that most of the guys build their own batteries...so absolutely not a drop-in solution.

Hi, I signed up here just to participate in this thread. I purchased a 75Ah ZT-480e in May 2019. So it has 3 summers of service, 55hrs on the meter. Used May-Oct to mow 10,000-15,000 ft as well as leaf cleanup in the fall. First season: 45-60 minutes of mowing left 60-70% charge remaining when finished. "70% battery issue" did appear occasionally during this first season. Second summer: similar performance but only 25-40% remaining when finished. "70% battery issue" becomes regular occurrence. Third summer: sharply reduced run time, could barely compete a full mow on one charge early in season, two charges required by Fall. "70% battery issue" is standard operating procedure, except when showing only 40%. Battery gauge becomes random and completely unreliable. Now: mower only runs for 12-20 minutes although I've only had it out a few times for spring cleanup. Any kind of heavy load (consuming a modest pile of leaves, driving full-speed, reversing quickly) kills it fast. I've read this entire thread and others, well-aware of Jamis' experience replacing a battery early on. Have never pulled and load tested mine. Wondering if it makes any sense to do that or if at this point just better off replacing all 4? Also wondering about substitutes for the LPC battery. Is there any reason not to use 100 Ah or even 110 Ah batteries to replace my 75s? Mighty Max looks to be priced slightly more reasonably. Data point: there are two reviews of the battery Eric S bought (HD# 1004165704) that mention using the battery in Ryobi mowers. There are also two reviews of the 110 Ah version (1004178597) that mention same. Terribly disappointed in this mower (due to battery life) but at this point I guess it is what it is. Looking forward to more replacement reports.