You will need a #10 torx driver to remove the screws
from the cap.

Remove the large O-ring that seals the cap to the bottle.

Remove the swivel retainer ring from the cap.

Remove the two (2) torx
screws from the top of the cap.

Turn the cap over and slowly pry
the inner cap from the
polycarbonate outer cap using a
butter knife or similar blunt blade

Remove the inner cap.

Note the three black O-rings and be careful not to lose them! The smaller
ones may still be in the outer cap when you remove the inner cap. Remove
them and put them aside. [Note: if you lose a small O-ring or if they are
broken, you can simply use a small dab of silicone caulking on the screw post
when you reassemble the cap.]

Remove the two
screws that attach
the LED reflector
to the cap.

Remove the reflector from the circuit board.

Carefully fold the circuit
board back to reveal the
battery.

Remove the battery,
being careful not to
break any of the wire
connections.

If the battery
simply falls out, the
metal terminals on
either end of the
battery
compartment may
need to be bent
slightly so that they
make a good
connection with
the new battery.
Use a knife, small
screwdriver or
needle-nose pliers
to bend the
terminals in.

Insert the
new
rechargeable
AA battery,
again being
careful not
to disturb
the wires.
[Be sure the
+ and – ends
are in the
correct
position]

Replace the circuit board (don’t pinch the wires!) and
the reflector, lining up the screw holes.

Replace the two screws through the reflector and
circuit board, into the cap.

Note that there is only one correct way to replace the
inner cap to the outer one: there is a small stud on the
inner cap that inserts into a hole in the outer cap.

Replace the inner cap, being sure that all three O-
rings (one large and two small) remain in place.

Push the inner cap into the outer cap so that the small
O-rings remain in place and the screw holes line up.

Replace the outer
cap screws.

Replace the bottle seal O-ring.

Replace the swivel retainer.