Bests & Worsts Reviews from Amazon

After owning the mower for 3 months I thought I would write a review. I when the mower first came it worked good. The batteries lasted about what I was expecting. Not long after I noticed a steep decline of the battery capacity. I eventually called the company and they told me that I cannot leave the batteries in for days at a time. So basically I damaged the Battery and now it won't hold a good charge. It works but at about 35% of what it originally held. I understand that's my fault for not reading the manual carefully enough but my issue is with the engineering. 1) why make a charge that doesn't automatically shut off when the battery finishes charging? There are lights to tell you when it is fully charged. The batteries are insanely expensive you would think they would do more to make sure that the battery would not get damaged. Heck even a warning light sticker on the battery.