This article applies to:
- Field Gauge, all models.
What you will need:
- Two (2) Alkaline AA Batteries
- Torque wrench with a 2mm (0.6 N-m) allen key
Make sure the Field Gauge is powered off.
Remove the four screws from the back of the Field Gauge with a 2mm Allen wrench

Remove the back panel.

Remove expired batteries, and replace with fresh AA batteries.
Be sure to properly align the positive and negative ends to the proper contacts.

Replace the back panel.
Insert and tighten the four back panel screws to 5 in-lb (0.6 N-m)
Tighten to 5 in-lb (0.6 N-m) to maintain water resistance.