majenko:
calvingloster:
if you had to charge a battery in 3 stages like they say you must how can u know when one stage must be finished and the next stage must start? by measuring the battery voltage? but how do you do that when the battery is on charge? will you not measure the charging units voltage? or must you first unplug the battery from the charger and then measure the voltage then decide what stage it should be on?The battery voltage varies all the time you are charging. As I mentioned earlier the power supply's voltage is variable, so the voltage at any one point in time will be the charge voltage. You can measure this at any time while charging quite happily.
ok so for example if i have a flat battery, it measures 10volts and i put a 14v charger on this battery and try and measure the batteries voltage with the charger on i will not get 10volts. so how can you know what the batteries voltage is while it is on charge??