Insert the batteries in the positions as shown by the polarity symbols inside compartment
4.Replace the battery cover and move the latch back to the locked (centered) position.
5.If you are using NiMH battery pack, please charge the NiMH batteries continuously for 14 to 16 hours with AC-DC power adapter, or 3 hours with the optional charging and communication cradle.
Note: The AC-DC power adapter is only for NiMH battery pack recharging. It won’t recharge alkaline batteries. Do not incinerate, crush, or puncture batteries.
Do not dispose of alkaline batteries in fire. Do not attempt to recharge alkaline batteries.
Backup Battery
The PT-500 also has a built-in rechargeable Lithium backup battery that temporarily protects data stored in RAM. The power of the Lithium battery is only consumed when the main power source is not available, such as when the main battery is removed or discharged. When a functional NiMH battery pack or 3 AA-size batteries are in the main battery compartment, power is provided to backup the RAM memory and system clock, which effectively puts the Lithium battery in a standby state.
The power circuitry of the PT-500 monitors the voltage level from the main power source and automatically connects the Lithium battery for backup once it has detected that inadequate power is being provided by the main power source. Under these conditions, the life of the Lithium battery would be up to 10 hours. Therefore it is highly recommended that the main battery always be kept adequately charged inside the unit.
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