LiPo 7.4V 1200mAh 20C Valken
Energy Stick Battery Pack

Lithium-Ion-Polymer
(LiPo) packs are successors to the known Lithium-Ion
(LiIon) packs. The basic advantage of LiPo is undoubtedly the ratio of capacity to size. The
packs are of very small size whilst maintaining a very large electric
efficiency, which allows for the choosing of an appropriate pack for
practically every AEG replica. They do not feature a memory effect.  Can be charged very frequently, without the
need to be fully discharged. Frequent charging is beneficial for every type of
a battery.

It is crucial to remember not to discharge a LiPo
pack to a level of less than 3 V per cell and not to overcharge over 4.2 V per cell.
Another advantage of LiPo packs is a small percentage
rate of self-discharge. An unused pack will lose approximately 3 – 5% of energy
per month. It is important to pay attention to an unused pack as there is a
risk that as a result of not being used over a prolonged period of time it can
be discharged beneath the acceptable minimal value (3 V per cell) and
inadvertent chemical reactions may occur, which lead to a deterioration of the
pack’s properties including a permanent damage and, in extreme cases, fire. An
unused LiPo pack should be charged to an average of
70%.

Properly used, a LiPo pack has an exploitation period
of on average 500 – 700 cycles. An important factor is the temperature that LiPo packs can work
in. In contrast to other batteries, LiPo cells
perform well at low temperatures.  However, they should be charged at room
temperature. In order to maintain the good condition of LiPo
batteries, it is required to balance them during
charging with a service connector, which most LiPo
packs have (a good LiPo charger features an inbuilt
balancer).

Usage of Li-Po
Batteries (PDF)