Icom IC-02A/AT/E Instruction Manual page 11

(2) Using IC-BP4
. Place the power switch in the OFF position. Remove the power
pack from the bottom of the set by pushing the pack in the
indicated direction while sliding the lock button upward.
Separate the pack into two parts as follows:
While sliding the lock button
upward, push the pack in the
indicated direction.
Press both sides of the pack. Push the chassis downward.
. The chassis holds six AA type batteries. Install batteries into
each holder, according to indicated polarity. With the batteries
properly in place, carefully replace the pack and slip it onto the
set with the reverse procedures.
_ Also, AA type nickel-cadmium, rechargeable batteries can be used,
but the charger for them should be the optional BC-35 charger.