Accessory Battery Packs
Stay Powered Wherever Your Adventures Take You
Whether you're deep in the backcountry, anchored offshore, or navigating a power outage at camp, accessory battery packs are the unsung heroes that keep your essential electronics running. These compact, portable power solutions serve a broad spectrum of needs — from charging smartphones and GPS devices on a weekend hiking trip to sustaining portable air conditioners in a van or RV for days at a time. Understanding what to look for in this category can make the difference between a seamless adventure and being left in the dark.
What Are Accessory Battery Packs?
Accessory battery packs are standalone rechargeable power units designed to supplement or replace the power needs of a wide range of devices. Unlike a vehicle's main starting battery, these packs are purpose-built for consumer electronics, lighting equipment, marine electronics, and specialty outdoor gear. They typically use lithium-ion or lithium polymer chemistry for high energy density in a lightweight, portable form factor. Capacity is measured in watt-hours (Wh) or milliamp-hours (mAh) — the higher the number, the more runtime you can expect from your connected devices.
Key factors to consider when shopping for an accessory battery pack include:
- Capacity (Wh or mAh): Match the pack's capacity to your device's power draw and desired runtime.
- Output ports: Look for USB-A, USB-C, and DC outputs relevant to your gear.
- Recharge options: Many packs support solar, wall outlet, and 12V vehicle charging — critical for off-grid use.
- Durability: IP ratings, drop resistance, and build quality matter for outdoor and marine environments.
- Compatibility: Some packs are designed for specific devices (like portable air conditioners or fish finders), so always verify compatibility.
Top Brands in Accessory Battery Packs
Goal Zero is the dominant name in this category for good reason. Goal Zero's power banks are engineered for outdoor use — their Venture series is rubberized and ruggedized, while their Guide series features removable rechargeable AA batteries that can also be charged via solar panel, making them exceptionally versatile for off-grid adventurers.
Zero Breeze takes a specialized approach, offering high-capacity battery packs designed specifically to power their portable air conditioner systems. Zero Breeze battery packs like the Mark 3 Battery feature a stackable, chainable design and support solar, AC, and 12V charging — making them ideal for campers, van lifers, and boaters who demand climate control off the grid.
Coast brings its reputation for professional-grade illumination tools to the battery pack space. Coast's Zithion-X rechargeable battery packs are purpose-built for their lineup of LED flashlights and headlamps, offering USB-C charging and built-in safety circuits so your lighting gear is always ready when it matters most.
Vexilar is a trusted name in marine and ice fishing electronics, and their accessory battery solutions are built to keep fish finders and sonar units powered through long days on the water or ice. If you rely on Vexilar sonar, a compatible battery pack ensures uninterrupted performance in demanding conditions.
Streamlight is renowned for professional-grade lighting trusted by law enforcement, firefighters, and tradespeople. Their accessory battery packs are engineered to the same exacting standards as their lights — delivering reliable, consistent power for critical applications where performance cannot be compromised.