What are the wireless home alarm systems with the longest battery life?

A 4K (3840×2160) wire-free spotlight camera with an 8MP image sensor, color night vision, motion-activated spotlight and remote-triggered siren; connects over Wi‑Fi (2.4/5 GHz) and supports microSD and cloud storage. Suited for outdoor use (IP65) and for users wanting high-resolution, battery-operated monitoring with smart‑lighting deterrence.

Aqara P2 is a Matter-over-Thread contact sensor powered by a single CR123A battery with a high-precision Hall sensor for open/close detection. It pairs natively to Matter-compatible Thread border routers for local automations and works across major smart home ecosystems.

Battery-powered 1080p outdoor camera with up to two years battery life (with default settings), motion detection, two-way audio, and Sync Module support for multi-camera systems. Suits renters or homeowners who want simple, wireless surveillance and Alexa integration.

Encrypted two-way wireless door/window contact designed for SiX-enabled Lyric systems; features remote diagnostics, battery pull-tab, tamper protection, and a CR123A user-replaceable battery. Offers long transmission range and centralized health/battery reporting for professional-managed alarm setups, suited to secure entry points.

The SiXPIR is a 2.4 GHz encrypted wireless PIR motion detector designed for Honeywell Lyric systems, offering pet immunity up to 80 lb, a 40 ft by 56 ft coverage pattern, tamper protection, and up to 300 ft transmission range. It uses CR123A batteries rated for about five years and integrates with Total Connect for alerts and remote monitoring, suited to Lyric users seeking secure, encrypted motion sensing.

The Verkada BR31 is a wireless door sensor using a VLink sub-GHz transceiver with long open-field range and low-power operation. It uses replaceable batteries and offers tamper detection and remote health alerts, suited for commercial and large properties using Verkada Alarms.

The BR32 is a wireless PIR motion sensor with a 32 ft detection range and a 90° field of view that pairs to Verkada wireless hubs using a proprietary VLink protocol with AES-128 encryption. It uses 2×CR123A batteries (user-replaceable) for multi-year battery life and is cloud-managed from Verkada Command, suited for integration into Verkada alarm and video systems.

Wyze Cam Outdoor is a battery-powered outdoor security camera with PIR motion detection, two-way audio, and an integrated siren; it offers up to six months of battery life and supports solar charging. It suits users who want an affordable, wire-free outdoor camera managed through the Wyze app.