Usually who uses LiPo or LiIon batteries for an airplane uses electric motors (with 2s, 3s or even 4s packs). For those you have to use a speed controller with a BEC that makes the 5V for the radio and I am not sure others but for example I have one that specially designed for LiIon/LiPo batteries so that it measures it I do not know how many times in a second and shuts the system (nearly) completly down if anything is wrong -- well, it does not measure the temperature of the battery which might be a good idea. I am also using a cell equalizer for charging and a quite expensive charger that also measures the battery several times a second but I know lots of others do not care about of that -- as far as I know the cell equalizer is nothing about the safety but the durability of the battery, however, using an improper charer has a risk of having an explosion. Well, mechanical protection... when I smashed my plane into the ground at around 60 Km/h the battery itself had not even scratched as it was housing in a styroplast strengthened by fibre glass -- I think it is much more protective than a mobile phone or a laptop battery, so i do not know, when you drop it onto to a hard floor I think you have a better chance to happen something. Tamas On 15/08/06, William Chops Westfield wrote: > > > On Aug 15, 2006, at 11:14 AM, John Ferrell wrote: > > > Li-Ion are pretty tame compared to Li-Po technology. > > > I hear that, generally from the model plane community where they're > in the habit of using cells without any electrical protection, and > with very little in the form of mechanical protection. (in an > application where the mechanical protection might be important.) > But the technology is very similar to li-ion, and I'm not convinced > that they're fundamentally "less tame." > > (likewise, the last laptop battery pack I stripped for it's cells > happened to have LiPo cells rather than li-ion cells, so it's hard > to tell which is which...) > > BillW > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- unPIC -- The PIC Disassembler http://unpic.sourceforge.net -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist