R Francis

i have been having battery problems during lockdown yesterday car would not go into ready mode kept saying put in park and press star. it was in park i put my tester on the battery it said 8v i then put trickle charger on and tester read 12.8v 2 hours later it was back at 9v took it back up to 12v but still dose not want to go to ready mode i think the battery is on its way out its 4 1/2 years old being such a small battery perhaps its time is up. anyone else had same problem