14 F-POD USER GUIDE
Installing batteries
The POD battery pack consists of 2 stacks of 5 cells, side-by-side in the
housing, with the positive end of all cells facing inwards.
For most purposes, alkaline D-cells are recommended. See Calculating
the maximum deployment time on page 9 more information.
F-POD buoyancy varies with total cell weight. Positive buoyancy is
approximately 0.7 kg with alkaline D-cells and 1.2 kg with lithium batteries.
The POD uses one stack of D-cells at a time. The electronics selects the
stack that provides the lower voltage. When the voltage from this stack of
cells falls too low, the POD software selects the other stack of cells
automatically.
To install the batteries:
1. Inspect the batteries for damage. If the insulation around the outside
casing of the battery is damaged, it can cause the battery pack to short-
circuit. Either repair it with tape or use a new battery.
2. Place the POD on a horizontal surface.
3. Slide the cells into the POD one by one, filling first one stack and then
the other.
4. Fit the battery pack connector spring as shown below by squeezing the
spring gently and passing the loop in the bottom of the spring over the
rod. Then slide the spring down the rod until it touches the batteries.
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