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Just a word of warning to anyone planning to use Li-ion or Li-Po batteries.
Please use the correct charger. Lithium batteries are charged with a constant voltage and diminishing current, rather than NiCads & NiMhs that are charged with constant current, but rising voltage (until a delta peak is reached to terminate the charge). If you charge a Lithium battery incorrectly it will explode. Larger batteries will explode with more vigor and have been responsible for burning down houses. If you want to see more, google Lipo fires and I'm sure you'll find some impressive videos.
I use LiPo batteries in RC planes, and have seen examples of them self-destructing when abused. If treated with respect they are great batteries - the power delivery is awesome (42V at 100amps = 4.2kW to lift an RC helicopter weighing ~3-4kg = breath-taking performance)
Just my two cents worth,
Regards
David T
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