Specifications

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11. Carefully place the battery cover door on the FT-817 battery compartment, close the door, and insert
the dust plug if desired.
12. Turn the FT-817 over so that the front panel is facing you and the speaker is facing upwards.
13. Turn on the power and verify that the radio is operating.
14. Turn power off. NOTE: The battery is generally delivered in a discharged condition.
15. You are encouraged to properly condition your new One-Plug Power Plus battery pack before regular
usage in order to achieve maximum lifetime and capacity. See subsequent section entitled “Battery
Care.”
OPERATION OF YOUR ONE-PLUG POWER
Once you have installed One-Plug Power Plus, its operation is simple. If you have the battery charged and no
external power sources attached to the FT-817, then the FT-817 will operate as usual from the battery. Unlike the
Yaesu battery pack, One-Plug Power Plus provides charging alternatives for you.
READ "BATTERY CARE" BELOW BEFORE OPERATING YOUR ONE-PLUG POWER.
1. BEFORE ATTEMPTING TO FAST CHARGE WITH THE DOOR CLOSED, REMOVE THE
DUST PLUG (if installed) FROM THE DOOR. STORE IT SO THAT YOU CAN INSERT IT
INTO THE DOOR AFTER YOU HAVE COMPLETED CHARGING.
2. WHEN TO CHARGE THE OPP+:
Although you may charge the OPP+ at any time, it is recommended that you don't recharge the pack
until it is at least 50% discharged. A simple method to estimate this point is to charge only when the
displayed voltage is less than 9.6 VDC. Charging a near-full NiMH pack can damage the cells and
reduce the capacity and lifetime. Read the Battery Care Section on the next page.
3. SLOW METHOD --- Use the FT-817 internal charger to recharge the OPP+ battery pack:
Set Menu #11 [BATT-CHG] to select the charge time. Two 8-hour cycles are suggested WHEN the
battery pack has been fully discharged, i.e., the FT-817 has turned itself off because the voltage has
dropped to about 7.2 VDC. Use Operating Function CHG (Row 11) to activate charging. W4RT
Electronics
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recommends that the external power supply attached to the FT-817 power plug comply
with the Yaesu specifications. The internal charger provides approximately 180 mA charging current
when the input voltage is 13.8 VDC to the FT-817. If the supply voltage is lower, then charge time
increases significantly. For example, if the input voltage is 12 VDC, the internal charger will provide
about 100 mA. NOTE (1): You may continue to operate the FT-817 normally while the battery pack
is being recharged. NOTE (2): The internal charger is a constant current circuit and is controlled only
by the time you select. Damage to the cell may occur if you improperly overcharge.