User Guide for the Platinum Series Sound Processor 17To charge the lithium ion rechargeable batteries:• Place charger on a flat surface.• Connect the power supply cord to the power supply. Connect the cable from thepower supply to the charger. Plug power supply cord into power outlet.Figure 13: Connecting the Power Supply to the Charger.• Gently insert one or two rechargeable batteries in the charger so that the con-tacts on each battery match up with the contacts in the charger. The charger isdesigned so that batteries will only insert in one direction.Figure 14: Battery Charger with Battery.• The batteries will start charging automatically.• If a partially charged battery is placed in the charger, the battery may be fullycharged in a shorter period of time. The battery can be removed at anytime.The charger and batteries will not be damaged if the batteries are left in thecharger longer than the required charging time (approximately 3.5 hours). Itis a good idea to use the batteries on a rotating basis to maximize battery life.Batteries can be labeled (e.g., 1, 2, 3) to keep track of the rotation.