The installation of battery in HHTK can be done by following below instructions:
1. Remove six screws (A).
2. Separate front housing (B) of Hand-held Test Kit from back housing (C).
3. Carefully remove battery circuit board (D).
4. If replacing batteries, remove old batteries.
5. Insert new batteries (E) making sure polarity is correct.
6. Carefully install battery circuit board (D).
7. Attach back housing (C) of Hand-held Test Kit to front housing (B) using six previously removed tapping screws (A).