View source for RAPOSA-NG Batteries

[[Image:RAPOSA_Battery.JPG|300px|thumb|Battery used by RAPOSA-NG]]

[[RAPOSA-NG]] uses Lithium-ion Polymer batteries (Li-Po) with 4800mAh and 14.8V. 

==== Battery ====

The primary difference between this batteries and other Lithium-ion is that the lithium-salt electrolyte is not held in an organic solvent but in a solid polymer composite such as polyethylene oxide or polyacrylonitrile.

Each battery is composed of 4 cells with 2400mAh and 3.7V each, in a 4S2P fashion (two 4 series packs in parallel).

[[Image:Raposa_4s2p.jpg|499x174px|4S2P Fashion]]

==== Battery Charger ====

[[Image:RAPOSA_BATTERIES.jpg|400px|thumb|How to charge RAPOSA-NG batteries using ULTRAMAT 10]]

Currently two all-purpose fast chargers from Groupner (ULTRAMAT 10) are used to charge RAPOSA-NG batteries at the Mobile Robots Laboratory (8th floor, North Tower, IST Campus-Alameda).


To recharge RAPOSA-NG batteries using ULTRAMAT 10:

* Connect the ULTRAMAT 10 power plug to an available power socket;

* Connect the battery plug to the ULTRAMAT 10 battery socket;

* Press ENTER (the first button from the right) two times.


If the ULTRAMAT screen presents the following screen (the current and voltage displayed in this image are irrelevant)

[[Image:ULTRAMAT_CRG.jpg]]

it means that it is charging‎. When finished, the ULTRAMAT 10 will beep for a few seconds and the following screen (again, the current and voltage displayed in this image are irrelevant)

[[Image:Raposa_END.jpg‎]]

will be presented.


For any other information regarding the ULTRAMAT 10 usage, please check this manual (in Dutch, English and French):

[http://clubcugnaux.free.fr/Page_notices_techniques/ChargeurGraupnerUltramat10.pdf Battery Charger ULTRAMAT 10 manual]

==== Risks ====

This batteries are highly dangerous when used without proprer measures. They can only be charged with appropritate Lithium-ion Polymer chargers and with the correct specifications. Crashes, high temperatures and short circuits can cause explosions. Please be extra carefull when dealing with this batteries.

==== Precautions ====

* NO NOT use other chargers to charge the batteries, unless it is a Li-Po charger and it is correctly configured;
* Avoid recharging batteries already charged. This can reduce their live expectancy;
* Recharge a battery as soon as possible to prevent live damages;
* Never leave them recharging without any supervision, as any accident with the battery can cause a fire;
* If a battery starts to swell (or is already swollen), STOP USING IT and give them to someone that can thew them away in the proper places;
* NEVER trow a battery into the normal garbage.


== See Also ==

*[[RAPOSA-NG]]