I bought a Craftsman cordless electric lawnmower this year. I have had no problems with it at all. A few things I don't like are...it is heavy and you cannot tell if it is charged until you start the mower up.
The problem with cordless products is the battery will except so many charges and the it won't hold a charge anymore. So the chargeable battery needs to be replaced if it is possible (some aren't) or you may need a new mower. You didn't say how old the unit is. The life of a rechargeable battery operating under normal conditions is generally between 500 to 800 charge-discharge cycles.
This translates into about three years of battery life for the average user. As the rechargeable battery begins to die, the user will notice a decline in the running time of the battery. When a battery that originally operated the flashlight for a whole shift is only supplying the user with an hour's worth of use, it's time for a new one.
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