Tech Tips Online
April 15, 2002
Battery Charging Information
We are finding that many warranty return batteries simply need a good charge.
After charging these batteries pass all tests. This is puzzling since batteries must
be fully charged before a technician can perform proper diagnostics on a battery.
One possible explanation is that the battery voltage on these batteries was so
low the Deltran charger would not function.
There is a protection circuit in the Deltran chargers that does not allow charging if
the battery is below 4.5 volts. If you encounter any very low batteries they will
require charging for a short time on a generic variable rate charger to get the
battery up to 4.5 volts before the Deltran can be used.


Source: http://www.harleyhog.co.uk/