Tecsun PL-660 Operation Manual page 27

QUESTIONS
The charging time
becomes shorter and
shorter.
Radio malfunction.
. -- 28 --
TROUBLE SHOOTING
ANSWERS
The chargeable batteries
getting old.
This may caused by
interference, and the
computer microchip does
not function properly.
SOLUTIONS
Replace the old rechargeable
batteries with new ones.
Remove all batteries, then
reload again.
If it is still not working,
please press on the reset
button with a pointed object.