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FES BATTERY PACK GEN2 14S, Version 1.23
4.1 Installing the batteries
Warning: Make sure that both battery packs are fully charged before
installation into sailplane. Both battery packs must have approximately the
same voltage level of each cell (close to 4.16 V per cell). There should be less
than 1V difference, between total voltage levels of each battery pack!
1. Check batteries for any visual damage.
Warning: Even small visually detectable damages imply that the affected
battery is not airworthy.
2. Open battery compartment cover.
3. Check: "Power switch" OFF.
4. Check: Sailplane main switch (fuse) OFF.
5. Insert first pack (terminals facing forward) and slide it back to rear position.
6. Insert second pack (terminals are facing rearward).
7. Place pair of fixation plates in the middle of rear pack, above carrying strap and
tighten fixation knob.
8. Secure forward battery in the same way.
9. Lift power cables from side support.
10. Plug in shorter cable, with 8mm pin in BLUE (or BLACK) housing, to minus marked
8mm socket of front battery pack.
11. Plug in longer cable with 10mm pin in RED housing, to plus marked 10mm socket of
rear battery pack.
12. Insert DATA cable connectors, to each battery pack DATA connector.
Caution:
is correct. Connector should be plugged in straight direction, otherwise pins
could be damaged.
13. Close battery compartment cover.
Warning: In flight the battery compartment cover must be sealed with tape.
If water could possibly enter in the battery compartment on the ground (e.g.
rain shower or when cleaning), then also on the ground the battery
compartment cover must be sealed. Entering water, even in small quantities,
could damage the batteries.
Prior to insert DATA cable connector make sure that the orientation
Page 15 of 26
September 2019
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