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