The radio uses various rechargeable Ni-Cd packs or a dry cell case. To avoid the "memory effect" and protect the unit, never short the charging terminals or use unapproved chargers. Quick Command Cheat Sheet
For those looking for a deeper dive, you can find the complete Yaesu FT-50R User Manual on QRZCQ or a digitized version on the Internet Archive . Yaesu Ft 50R Manual
includes a built-in math game. Power up while holding to enter. Numbers will scroll from left to right; your goal is to press the number on the keypad that adds up to ten with the displayed number, then press F . Maintenance Tips from the Manual The radio uses various rechargeable Ni-Cd packs or