How to replace your small helicopter
battery cell. 3- channel helicoptersFirst,
if the new lithium polymer cell you bought does not have its
own protection circuit for low-voltage
will need to rob the one off the original helicopter battery
pack.Once you carefully remove the yellow
Kapton tape covering the battery pack's end (save this to
re-use, as it's very, very sticky stuff), you will see the
itty bitty battery protection board. This keeps the cell from
ever being over-discharged (in theory).
will want to desolder this tiny circuit
board from the Lipo cell, taking care not to short across
the contacts with your soldering iron. The PCB may
have the same or similar markings on it.
Please note what wire is going where, and
even take a digital shot or two for later reference. This shot
has been referred to many, many times.
new pack's leads
My usual "duty cycle" for a
mini heli is two minutes of flight at one time, period. Notice
the tidy connections here, no more wire is stripped than
Below you see the low voltage protection
circuit from a small remote controlled toy helicopter
battery's 3.7volt Lithium Polymer cell. Many models have a
similar board, and they vary a lot in what they look like. The
only real difference in LiPoly cell protection circuits is how
many cells they are designed for.
Then insulate the small
separately from the battery. This makes
installation of your new lipo cell much easier to do.
then tuck the new pack
into the top front of
the canopy like this.
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