Minelab F3 Mine Detector Operation Manual page 12

e. Unlock the Battery Pack Lid by twisting the Battery Lock Lever
counter clockwise one-quarter turn. Once unlocked, pull the lid
away from the Battery Pack (the lid will stay attached to the
Battery Pack by a tether – Figure 5).
Figure 5: Removing the Battery Pack Lid
f. Using the battery maps, located on the side of the Battery Pack
and on the inside of the Battery Pack Lid, insert four D cell
batteries. Replace the Battery Pack Lid and rotate the Battery
Lock Lever clockwise one-quarter turn.
inserted incorrectly, the F3 will fail to function when switched on.
The F3 requires 4 D cell batteries for operation. Use only high
quality alkaline
recommends that only rechargeable batteries with a capacity of
4000 mAH or greater be used with the F3. Rechargeable batteries
have specific charge/discharge maintenance requirements, which
should be strictly followed to ensure maximum battery life. Only
NiCad and NiMh type D cell rechargeable batteries are suitable for
use with the F3.
NOTE
(LR20) or rechargeable
9
If the batteries are
batteries. Minelab