PSU,
What is above is not wrong, but it is incomplete. On the other side of that breaker should be battery voltage. If that is like 7-1/2V, something is wrong. I suggest that you get a largish 12V bulb and socket and put one each across those breakers. The light will (should) not light, but it will allow the battery to be charged slowly. Give it a few days (no Joke) and measure the battery voltages again.
It is my suspicion that you have more wrong than just those circuit breakers. It may be a bad battery and if you replace the breakers now, you will just have to replace them again later.
Matt