Li-Ion 7.4v 3000mAh Nunchuck Battery
(Tamiya)

A LiPo
7.4 V pack, designed especially with ASG electric replicas in mind. The
pack is equipped with a female Deans connector. High quality of constituent
parts allows this battery to function for a long time on a single charge. 

Li-Ion packs are characteristic for increased energy
efficiency. They do not feature the so-called memory effect, that is why they
can be charged very often (it is even recommended) and it will not affect the
packet’s qualities in a negative way. It is also characteristic of them to have
a small size in relation to the accumulated energy (they are exceptionally
small and light). This makes them very well suited for AEG replicas.

Li-Ion battery should not be left with a minimal charge
for prolonged periods of time as that may lead to the worsening of the
qualities guaranteed by the manufacturer and to damaging of cells.  In
order to maintain safety, good performance and parameters specified by the
manufacturer, it is worth to remember not to discharge the battery completely
and not to overcharge. Li-Ion batteries have a low level of self-discharge.
Depending on the environmental conditions, it can reach up to 8% per month.

Usage of Li-Ion Batteries (PDF)