Lead oxide carbon battery needed

We are looking for a lead oxide carbon battery (or some variant of lead acid that is fast charging and long lasting).
Following are our specs:
Background: Ourrenewable energy product has a power source, which is a generator is12V, 4 to 6 Ampere (spikes of 8 Ampere possible). We can put an overcurrent and over voltage protector in the charger and protect thebattery if the power exceeds 50-60 watt.
We would like to charge a battery using this generator. Please see the schematic AND the generator test reports.
Energy to be stored= 6Wh or higher.
Voltage= Any voltage less than or equal to 12V is OK.
Life= 2000 cycles
Annual volumes= @ 1 cell per lamp= Optimistic case= 900K lamps = 900K batteries per year
Annual volumes= @ 1 cell per lamp= Pessimistic case= 500K lamps = 500K batteries per year
Annual volumes= @ 1 cell per lamp= Realistic case= 700K lamps = 700K batteries per year
Ideallyif you could provide us a battery cell with charger, that would beideal. If you cannot provide us the charger, please provide someguidance and we will get it done from some electronics consulting firmin India.
Thanks!
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Warm Regards,
Ashish Gawade
Social Entrepreneur/CEO
Bottom of Pyramid Energy and Environmental Innovations
ConfidentialityStatement: Everything mentioned in this email is extremelyconfidential. This may not be revealed to anyone without explicitwritten permission of BoPEEI. Otherwise, this will result in heavy lawsuits.