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Battery Care:
Many people are still
in the habit of storing packs at low voltage (below .9 a cell) like
they did with GP cells. This is not good for the IB cells. We
found rapid loss of runtime leaving a cell below .9volts (5.4 for a
6cell pack) for more then a week, yet the voltage gained from this was
so minimal that we strongly do NOT recommend sacrificing the runtime
to gain voltage! There are a few different methods that can be
used for storing cells, but this is what we recommend to keep you
packs in the best shape possible:
Charging:
Before charging,
ensure the pack is discharged, equalized, and at room temperature.
We recommend a 6 amp linear charge for almost all circumstances, along
with a .03volt (30mv) cutoff value, and if you have thermal on your
charger, set it to 120degrees F. This will ensure a full charge
that is safe for your pack. Higher amp charges will create more
power on the track, at an apparent loss of runtime during that run,
and if done frequently, in overall pack lifespan. We found 8
amps with a .02v (20mv) cutoff to be the highest rate worth charging
at, above that will just get the pack hotter. Whenever charging
at higher amp rate, use a lower peak detect and keep a close watch on
temperature. Over 130 degrees F can cause severe damage to the
cells.
Re-Peak:
Sometimes your
battery will be sitting a while before it is actually needed to run.
We recommend re-peaking only if the pack has been sitting 20 minutes
or more before the race.
Use the same parameters as your charge, and watch the temperature, if
the pack is getting hot, or the voltage has started to decrease, your
pack is ready to go.
Discharging:
After each run
discharge the pack at 30 amps down to .9volts per cell (5.4 for a
6cell pack) and then use a discharge tray such as the Novak Smart
Tray, or the Much More CTX-D to bring each cell to .9volts. You
can also use a more economical version with bulbs, just monitor the
voltage of each cell closely. The use of trays that bring cells
down to a lower voltage (such as the Tekin or Integy 0-30) is alright
to get all the cells equalized, but some charge must be put back in
afterwards if the pack is not being used again that day.
Storage:
Store your packs with
about 500mah charge in them on a week to week basis. If you will
not be using a pack for longer periods of time, such as once a month,
then keep around 1000mah in the pack. This storage method
preserve the cell the best.
If you store packs at
.9volts per cell (5.4 for a 6cell pack) you will notice a small
decrease in runtime, and the voltage will creep up slightly.
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