Car battery

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A car battery is a lead-acid battery that provides a nominal 12-volt (actually 12.6V) potential difference by serially connecting six cells that each produce about 2 to 2.1V each. (This actually agrees with the XO voltage needings - what do you mean by this sentence? Shenki)

Depending on individual specs, these batteries must be charged at 13.2-14.4V.

Car batteries are comprised of different types of cells, but the XO will preferably need the deep cycle battery (DCB) type, for reasons outlined below.

Deep Cycle Batteries

DCB's are designed to provide a steady amount of current over a long period of time; they achieve this by using thicker plates than typical car batteries. DCBs are found in boats, golf carts, and solar power systems.

Properties of batteries

• Cold Cranking Amps (CCA) - amps that the battery can produce at 0°C
• Reserve Capacity (RC) - minutes that the battery can deliver 25A, voltage > 10.5V

For DCBs, RC is 2-3 times greater than car batteries, while CCA is about 0.5-0.75 of car batteries. While car batteries are not designed to be completely discharged, DCBs should withstand hundreds of discharge/recharge cycles.

Launch Countries

These are the launch countries; places where the XO's will be deployed first. We need to find information about the availability of DCBs in these areas.

As the OLPC organisation deals with these countries primarily at a government level, we need to uncover local knowledge regarding sources of batteries, specifically regarding the availability of DCBs that are light enough for two children to carry. If you can help out in this area, please get in touch with Joel or Rafael

• Brazil (especially rural areas)
• Uruguay (especially rural areas)
• Argentina (especially rural areas)
• Libya
• Nigeria
• Ethiopia
• Pakistan
• Peru
• Rwanda

Vendors

This section should contain different specifications for DCBs and also availability in the different countries.

DCB and CarBatteries

Country	Vendors	Specs	Availability	Price
Argentina	Acumuladores Arizona SRL DIBA de Alvarado EnerSystem GIAFA S.R.L. L&R Ingenieria La Inesina Solar		Good
Brasil	Grupo Multi Comercial Mackey Cyloau Representações Comerciais Industria De Baterias Raiom Ltda. Enerbrax Acumuladores Ltda S.T.A.
Etiopia
Libia
Nigeria	SunEnergy Technologies Rubitec Nigeria Limited Greenpower Overseas Limited Naija Solar Systems Union Autoparts Manufacturing Company Limited AVRS Group (West Africa) Borodo& Co. Limited ComNet Technologies Limited Dahiru Solar Technical Services Darodaz Limited DIKUS INDUSTRIES LIMITED Harvest Solar Jusan Nig. Ltd New World Energy Limited Prince Power Technology Construction (PRINCEPOWER) Sabadel Solar System (Nig) Ltd Siman Engineering Limited Solarmate Engineering Limited Swillas Engineering Limited Yuccan Nigeria Limited
Pakistan	Alternate Power Solutions Jasco Private Limited A Modern Dev. Est. - HITEC Al-Ahmer Enterprises AL-Hassan Engineering & Construction Pvt. Ltd Atlas Battery Limited DEWYNE TRADE INTERNATIONAL Grace Accumulators INDUSTRIAL TECHNOLOGIES Infotech Co. NTERWORLD TRADING CORPORATION Javedan Resources Corporation MESEC Pak China Trade Impex Powertech Project Procurement International Shacho Electronics Siemens Pakistan Engineering Company Limited, BU Solar Solar East Solargy Enterprises (Pvt) Ltd Stabac Electronics Co. Trillium Pakistan (Pvt) Limited Zakaria & Zakaria Zeeshan Electronics
Peru	Industrias Electroquimicas
Rwanda
Uruguay

Links

• Car batteries
• Rechargeable battery

Resources

• http://www.laguarderia.com.ar/optima-batteries/optima_batteries_faq.php (argentina)
• http://www.in-sumos.com.ar/listado.php?id_subcat=648&marca=TRV (argentina)
• http://www.deremate.com.ar/accdb/viewItem.asp?IDI=15993677 (argentina)
• http://energy.sourceguides.com/businesses/byP/batP/batt/byGeo/byC/Peru/Peru.shtml (peru)
• (uruguay)
• (brasil)