How To Tell If A 12 Volt Battery Is Bad. A reading of 1210 volts means that it is halfway. 80 or lower means your battery is empty.
A reading of 1210 volts means that it is halfway. The easier way how to find whether lithium battery is bad or not. A full step-by-step is outside of the scope of this article but there are a few key points to remember.
The battery is not charged and could be bad if the reading is 119 volts or lower.
These are the clear signs of having a bad battery. This is a pretty neat product that can test for dead cells in a battery and test. Take another reading of the battery. Charge to somewhere around 4142V and then start discharge with 1A current.
