2.8 Whr Nokia 2600 Classic Cell Phone Battery by Nokia (3.7V Li-Ion) | Amstron® UltraXP 1.8PB® Portable Battery for Nokia 2600 Classic | Nokia 2600 Classic Cell Phone External Battery (5V 24 Whr Li-Polymer) by Amstron | Powerocks 5V 39 Whr power bank for Nokia 2600 Classic Cell Phone |