Now that you mention it I had a cheap Walmart battery powered mower about two years ago that had to use two batteries and couldn't even get through my small front yard. Anyway the instructions said the batteries had to cool down BEFORE going back on the charger. Talk about inconvenience, damn! I gave that damn mower away. Even though it was Hart Walmart brand those damn batteries cost just as much as name brand batteries. And you would need probably three sets just to get through my yard.I've seen big expensive cooling cabinets for charging radios, etc.. in hot warehouses; you can do the same thing with a cheap old wine cooler set at 78.



