Yaesu FT2DR Operating Instructions Manual page 165

The battery pack cannot be charged or battery
power depletes immediately after charging.
⿠ Is the battery pack being charged with a charger specified by Yaesu?
Charge the battery pack using the accessory battery charger (PA-48B or SAD-14B) or the rapid
charge cradle (CD-41).
When using a external power supply, use the external power supply adapter with a cigarette lighter
plug (SDD-13) or an external power cable (E-DC-6).
⿠ Is the battery pack in use exhausted?
If the "Charging Error" appears on the LCD when charging, there is a chance the battery pack is over
discharged. If the error is repetitively displayed after charging the battery pack several times, the
battery pack may have reached its service life be defective. Battery packs are consumables. Please
replace the battery pack with a new one immediately. Battery packs can be charged and reused up to
approximately 300 times.
Depending on the combination for simultaneous reception, there may be internal beats from high
frequencies caused by the internal oscillator. This is not a malfunction. (See the calculation formula below:
"n" is for the arbitrary integer). Depending on the combination for simultaneous reception, there may be
fluctuations in receive sensitivity.
⿠ Receive Frequency = 12 MHz × n multiplicative
⿠ Receive Frequency = 16 MHz × n multiplicative
⿠ Receive Frequency = 15.6 MHz × n multiplicative
⿠ Receive Frequency = 4.9152 MHz × n multiplicative
⿠ Receive Frequency = 15.6 MHz × n multiplicative
⿠ Receive Frequency = 18.432 MHz × n multiplicative
⿠ Upper Side (A-Band) Frequency = (Lower Side (B-band) Frequency ± 46.35 MHz) × n multiplicative
⿠ Upper Side (A-Band) Frequency = (Lower Side (B-band) Frequency ± 47.25 MHz) × n multiplicative
@ Upper Side (A-band) Mode = NFM
If you suspect malfunction
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