Helicopter Lipo Battery
Li-po vs NiMH batteries in helicopters?
Whats the difference between a 7.4v lipo and a 8.4v nimh battery. The two rc helis are the same basically. Al;so which one takes longer to charge?
http://www.raidentech.com/green-shuttle-3-ch-helicopter.html
http://www.raidentech.com/the-shuttle-rc-full-3d-promotional-indoor-helicopter.html --I really have no clue
Lipo's have a higher discharge current capability and they're about 30% more efficient and lighter than NiMH's. So if you have a NiMH pack weighing 10oz, you'll get the same amount of runtime out of a 7oz Lipo, PLUS it'll discharge harder meaning more power when you need it.
Yes, the 8.4V is higher and therefore will initally make the motor go a little faster, but NiMH's also don't have as good of a discharge curve as Lipo's. If you are considering either, always go with Lipo's. They cost a bit more, but you get what you pay for.
Charging: Most lipos can charge at 1C or at their rated capacity (aka 1000 milliamp battery can charge at 1amp for one hour for full charge). NiMH's usually do best at 1/4C charge rates, but others charge at 1C, but they take a little longer to charge because of their charging sequence requirements. Some batteries (25C+) can charge up to 3C, but it'd advised against going over 2C for fast charge.
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April 14th, 2008 in
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