Her finner du alt om batterier:
http://batteryuniversity.com (http://batteryuniversity.com)
Noen direkte linker:
AGM Batterier: http://batteryuniversity.com/learn/article/absorbent_glass_mat_agm (http://batteryuniversity.com/learn/article/absorbent_glass_mat_agm)
Vanlig bly batterier: http://batteryuniversity.com/learn/article/lead_based_batteries