Einstein E-Collar 800TS Owner's Manual page 10

CHARGING THE BATTERIES
The indicator light will turn solid red during the 10 to 12 hour charge
•
cycle and stay red even though the unit is fully charged.
•
Battery Care:
It is important to fully charge the batteries and fully discharge
them for the first three uses. After that it is not necessary to fully
discharge the batteries with each use, because NiMH do not
exhibit "memory effect" like other rechargeable battery types. It is
recommended that every six months you recondition the batteries
by fully discharging them and then fully charging them, this will
ensure you get the rated 500 charges per battery.
Einstein Owner's Manual 800TS / 1200TS
09