Will a bad battery keep a laptop from turning on

Good day sir/maam, anything bad on your laptop is not good, if you are in doubt about the battery being bad, read the text written on your battery, you will get the information of how much voltage is the full charge of your battery, 9 volt, 12 volt 15 volt or 18 volt, depending on the make and model. Using a voltmeter measure the voltage across its terminals. If the charge is up to full, the battery is good, if the charge is low even if you charge it for an hour, your battery is bad. replace it.

if the battery is bad, yes. Also, if the batter charging circuit is bad, yes. The thing to do is get that battery tested in a shop, or, have another battery like it to try. Batteries are expensive and only have a 1 yr warranty. But, most people do not use the batteries because they are on an AC plug.