From memory, each of the six cells in a lead acid battery is between 2.2v and 2.4v when charged but after it has had time to 'settle' after being charged.
Hence, when all charged up and ready to go, you should expect to see 14.4v.
If one of the cells has failed (this is typical occurrance), the voltage will be 12v, and will drop quite quickly when under load.
Solution? Change the battery.
0.5A discharge? Chase the culprit circuit. The multi-meter is your best friend in these cases.
__________________
Piers du Pré
Last edited by Piers; 04-11-09 at 00:47.
|
Threaded Mode