How To Check Car Battery Is Charged Or Not. You can buy a hydrometer-style battery tester that measures the specific gravity of the battery acid and can tell you whether any cells are dead or not. Another option is to get the battery charged at your local auto parts store.
A problem with your battery is causing it to not hold a charge. Its a good idea to write down the reading. If the dashboard lights are dim something is likely wrong with your battery.
If not consider getting it checked out fully prior to a replacement.
This will include such things as a GPS or a phone charger. To check this wait 12 to 24 hours after charging to the full voltage keep the battery out of the vehicle and measure its voltage. However knowing a cell is dead is of no more use to you than knowing that the battery wont hold a charge so a test of the resting voltage is just as effective a. Even if your phone itself is not plugged into the charger if the charger is still plugged into.
