Car: 2016 5door passion red civic
Join Date: 22nd December 2007
Location: manchester UK
Thanked 10 Times in 10 Posts
Hi its advisable to disconnect pos connection on battery before charging, you will loose say nav but it will log back on once battery is reconnected. Trickle charge should not harm the car, A new battery ref A402S from euro parts will cost around £40 delivered. To check the battery you need a multi meter, With all off no load current should be 250 milliamps after about 15 minutes NLC wil lfall to 20 milliamps a sound battery will tolerate this for 7/10 days or more Charging volts should be around 14volts, fully charged battery will read 12.6 or above.