use only the ac adaptor specified for use with the charger unit to connect to an electrical outlet. be sure to connect the ac adaptor and turn charger unit power on before attempting to charge the battery pack of the data collector.
1 plug the ac adaptor into an electrical outlet.
2 after making sure that the power switch of the charger unit is at the off position, plug the other end of the ac adaptor into the ac terminal at the top of the charger unit.
3 turn on the charger unit. the power indicator on the charger unit lights red.

4 attach the data collector to the charger unit, making sure the charge terminals on the back of the data collector come into contact with the terminals of the charger unit.
if the data collector is attached properly, the power indicator lights green.
start of charging is indicated by the charge indicator of the charger unit lighting red.

pay attention to the ambient temperature when charging the battery pack
temperature ranges for battery pack use, charging, and storage are specified below. temperatures outside these ranges create the danger of deterioration of battery pack performance and shortening of its service life, as well as fluid leakage and heat generation.
operating temperature: -5℃ to 50℃
charging temperature: 0℃ to 40℃
storage temperature: ?-20℃ to 60℃
1 if the charge indicator does not light during charging, remove the battery pack and then re-attach it. if this does not solve the problem, it means that the battery pack is defective and needs to be replaced.
2 use only the specified battery pack.
3 battery packs naturally discharge even when they are not loaded in the data collector. use a battery pack as soon as possible after charging it.
4 for best charging results, keep the charger unit, data collector and battery pack contacts clean by periodically wiping them off with a cotton swab or dry cloth.