battery dies after less then 15 minutes even though charger is at 100%. Just bought these in April .
this is the 21"inch self propelled lawn mower with the 7.5 Ah battery and rapid charger. I purchased in May and it has been working perfect up until the last couple of cuts. I have always been able to cut the entire lawn which takes less the an hour to do with no problems. the charger is completely green but within less then 15 minutes the battery goes dead.