e-flight22

i have a 1800mah NiMH for my ZagiTazz and am wondering what is the equivalent Lipoly pack or better? im currently using the zagi brushless motor, and a jeti 40amp brushless esc. how do u calculate what the equivalent Lipoly pack is ???

also what do the numbers mean for the Lipoly packs, for example when u see one that is 3300mah 3cell 15C, another at 12C, another at 20C. ive never purchased one and i rly dont know anything about them, im totally lost, i feel like a beginner again. nicads made sense to me but now im rly confused. ????

also if i was to get a Lipoly pack id need a new charger, any recommendations as to what charger or a few chargers that u have had great experience with or would recommend. i have looked at Lipoly packs between 2200mah-4400mah so somewhere in there is what im thinking.

thanks for all your help

jdetray

What is the voltage of your NiMH pack? That is an important piece of information that you omitted.

Each lipo cell has a nominal voltage of 3.7V. So 2-cell lipo pack is 7.4V, and a 3-cell pack is 11.1V. Right off the charger, the pack voltage will be higher than that, about 8.4V and 12.6V for 2- and 3-cell lipo packs.

The capacity of a lipo is specified in mAh (milli-Amp hours), the same as for NiMH packs. The larger the capacity, the long run time you'll have but the larger (and heavier) the battery will be.

The C rating tells you the amount of current the pack can deliver. Multiply the pack's capacity times its "C" rating.

For example, lets look at a 3300 mAh pack.

If the pack is rated at 15C, the maximum current it can deliver is:
3300 x 15 = 49500 mA = 49.5 A

If the pack is rated at 12C, the maximum current it can deliver is:
3300 x 12 = 39600 mA or 39.6 A

If the pack is rated at 20C, the maximum current it can deliver is:
3300 x 20 = 66000 mA or 66 A

- Jeff

Gigaah

Keep in mind also Lipoly max charge rate is 1C(or around 1 hour).