My laptop is going off at 70%

When i woke up today i had to go for a run so i left my laptop to charge i let it chage and when i got back i found that it was full so as usual i started using it with no issued till at 70% it suddenly went off,i tried to yurn it on but nothing,i removed the battery and placed it back in and it turned on but while loading it went off again,jow it only works at the charger,when i unplug it goes off at 70 again (note i used my dads adaptor so am not sure if it contributed to the problem) please help