Battery
Various Types of batteries - from Marshall Brain 's HowStuffWorks
Learning Center of Eveready - from EVEREADY(R)
Introductory & Historical Information - from Electronics Information Online
Battery Facts - from Vidtek Battery Canada
Battery Guide - from Advanced Battery Systems

Ni-Cd
Comprehensive Article about Ni-Cd Battery - by Red Scholefield
The Rechargable Battery Clinic - by C. L. "Red" Scholefield
Ni-Cd Battery Care - by Bill Ludwig


NiMH
Benefits of NiMH Battery - from Super battery Packs
NiMH features - from The Palm Tree
Discharge and Retention Curve - from MAHA battery
Charge Curve - from Thomas Distribution
Discharge Curve - from Thomas Distribution
Curve for Cycle Life - from Thomas Distribution


Li-ion