User Guide

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4
Guide to Lithium Polymer Battery’s
This means that you can safely draw up to 44Amps from that pack, without
damaging it. That is only the theory however, in reality, some of the cheaper
battery brands tend to over-rate their batteries, which causes a lot of people a
lot of frustration, and dramatically reduces the battery's life span.
Breaking in batteries
So let’s start from the beginning. Irrespective of the battery's voltage (cell
count), C rating, or capacity, ALL NEW BATTERIES MUST BE BROKEN
IN before they are used on a model, or for whatever application they were in-
tended for. And this is how it works - all batteries have a "C" charge rate, in
addition to the "C" discharge rate. Usually, the charge rate is much smaller than
the discharge rate. Some brands claim that you can safely charge their
batteries with up to 8C charge rate, but this would be foolish, and experience
has proven that doing this, shortens a battery's life dramatically. Especially for
the break in cycles (1 cycle refers to one charge and one discharge of a
battery), the battery MUST be charged and discharged at 1C. So, for example,
if you have the above mentioned 2200mAh 20C Lipo, you must set your charger
to charge it at 2.2Amps, and then discharge it again at 2.2Amps. It is
recommended to put new batteries through 6-7 break in cycles at 1C, before
putting them in a model. Most modern chargers have automatic programs for
battery cycling, so you just have to input the number of cycles, and the charge
and discharge rates, start the program and wait for it to finish. With older
chargers you will have to manually start every charge and discharge program,
until you complete 6-7 cycles.
Charge C ratings are usually indicated on the label on the back of the battery.
However, not all brands indicate that, so make sure you ask for your specific
battery's charge C rating when you buy it.