Topic: 12V battery options? and solar panels?

[lagoausente]

 I would need battery packs at 12V DC. I want they are light, so forget the lead ones.
 Amperage would need, 2200, and, 4400, or maybe more if are not very expensive. Also would be useful to have power level indicator. What do you suggest?
 
  And what about those solar panels at around 20 watt?  They seem not very big, have you tried them?