Wasserstein Built-in Lithium-Ion Battery Compatible with Blink Outdoor and Blink Indoor (2 Pack), The Wasserstein Lithium-Ion Battery is reusable and replaces your current alkaline batteries to power your Blink camera sustainably. Provides 50% more battery life for your Blink camera than using 2 x AA alkaline batteries. You can recharge the battery fully in just under 3 hours.