Not quite. A simple estimate of charge time for a completely discharged
battery is:

Charge Time = Battery Capacity / Charge Current

The current rating of the charger is (probably) NOT the charge current--that
is controlled by whatever circuit feeds the batteries. All the batteries
are charged with the same current (they are connected in series in the
scanner), so you do not have to multiply the capacity by the number of
batteries. The charge current with the batteries in the scanner is not
likely to be terribly high (100 mA), so it is quicker to charge high
capacity batteries with a smart charger that uses a high current initially,
then switches to a lower current when the charge is complete. Also remember
that the batteries aren't generally fully disharged, so the charge time to
replenish them is less than the calculated time. The suggestion made in
another reply to charge overnight is a good one.


"Evan Platt" wrote in message
...
I'm wondering if I have the formula down correct..

Scanner with a plug in 1000 mah charger. 4 2300 mah batteries. 4 *
2300 = 9200 mah. 9200 (total mah of batteries) / 1000 (mah rate of
charger) = 9.2. So 9.2 hours? Am I using the correct formula?

Thanks.

Evan