LIPO re-Build for B44
Info and pictures by pullinteef >> D.I.Y. $22 (plus shipping)
4500mah saddle pack (R/C Tech Forum / Electric Off-Road)
It takes about an hour if you're quick, 30-60 mins more if you take
your time.
WARNING: Do not do this unless you are very comfortable
with
soldering (quickly) and li-pos in general. I'd feel awful if somebody
did something really bad trying to do this when they shouldn't.
Here's the packs.
First, if you want to try to re-use the shrink wrap that they come in
carefully cut the end off the connector side of the pack and slide the
cells out leaving a shell.
Remove the power wires and balancer wires.
Carefully and as quickly as possible so as not to heat up
the cells, remove the bulk of the solder from the board. I found that
using an x-acto to pry up the tab while its molten worked the best, but
it would usually take 2 or 3 attempts to get it completely free. Let
the tabs cool down in between attempts or jump back and forth between
the two packs while waiting for stuff to cool. Also, be very gentle
with the tabs as they are the aluminum ones that have a solderable tab
crimped onto them. If you break the aluminum one, it is a serious pain
to connect to anything.
Always tape over areas that can short out with a slipped tool:
When you get the tabs free, use a credit card to slowly push down
between the cells to separate the sticky tape:
And then you have three cells, remove the orange tape and black sticky
bars here.
Line up all the pos and neg tabs to connect in parallel.
Then carefully fold the corners in and the end up over the folded in
corners (did that make any sense?) to shorten the cells as much as
possible. You can see the folded ends here. Again be real gentle so as
not to break off any of the tabs, they are pretty fragile.
The tabs are too short, I was able to connect with little 13g wire
tinned, do this for both packs:
Wire up your power wires and balance connector:
Tape up the connections really well with masking tape, then put some
strapping tape over the masking tape:
Slide the original shrinkwrap shells back on or just re-shrink with
your own:
Fit is perfect! They are really small and light, so you'll probably
need to add at least some weight:
Here is what I did with the above info for my T4. I used
two 4000
Mah batteries from WinForce in Hong Kong (cyberport888 on ebay), $29.98
SHIPPED!!
Because they are 4000 Mah does this mean I have a 8000 Mah Battery????
These are rated at 10C with 15C burst!!! :-(
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Ellenton, FL. Forecast
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