Battery Tender 800 SuperSmart Charger - Compact 800 mA Maintainer

Our review of the Battery Tender 800 finds it is a focused, no-nonsense battery maintainer for owners who need reliable, long-term battery care. It is ideal for motorcyclists, ATV riders, boat owners, and anyone who stores vehicles outdoors because the unit constantly monitors, charges, and maintains batteries while resisting shock, vibration, and moisture. The single biggest reason to choose this charger is its combination of true 800 mA constant current charging in a package no larger than a standard computer mouse, plus a fully automatic SuperSmart charging profile that keeps lead-acid, AGM, and gel batteries healthy without user intervention.

Key Features

• Fully automatic maintenance: The charger senses battery condition and switches between charge and float modes to prevent overcharge and keep batteries topped off.
• Encapsulated interior: The electronics are protected by a thermally conductive, flame retardant epoxy that shields against moisture, shock, and vibration for outdoor use.
• Safety protections: Spark proof design, reverse polarity protection, and short circuit protection make it safe to connect and leave on unattended.
• Compact power: Delivers 800 mA of constant current in a very small housing, so it is easy to mount or stow when not in use.
• Multiple connectors: Includes alligator clips and ring terminals for permanent or temporary connections on motorcycles, ATVs, boats, and similar vehicles.
• Long cords: Comes with a 6 ft AC cord and a 4.5 ft DC output cord to reach batteries in many mounting locations.

Who It's For

The Battery Tender 800 is best for owners of smaller vehicles and outdoor equipment who want a compact, always-on maintainer that resists moisture and vibration. It is especially suited to motorcycles, personal watercraft, ATVs, and small boats where space is limited and batteries are left unused for long periods.

It is less appropriate for users who need rapid bulk charging of very large batteries or those who require multi-bank charging features; for those needs a higher-amp or multi-bank charger would be a better match.

Pros & Cons

Pros

• Reliable automatic maintenance maintains battery health and reduces replacement frequency.
• Durable encapsulated construction provides real protection against moisture and vibration.
• Compact size and included connectors make installation and storage simple and convenient.

Cons

• The 800 mA output is intended for maintenance rather than fast recharging of deeply discharged large batteries.

Specifications

Our Verdict

The Battery Tender 800 is a practical, well-engineered maintainer for small vehicle batteries that delivers dependable automatic charging and excellent environmental protection in a tiny package. It is good value for riders and boaters who need a durable, always-ready solution to preserve battery life, though anyone needing fast bulk charging should consider a higher-current model.

Frequently Asked Questions

Can I leave this charger connected long term?
Yes. The SuperSmart circuitry monitors and maintains the battery, allowing safe long-term connection without overcharging.

Will it work on AGM and gel batteries?
Yes. It supports flooded lead-acid as well as maintenance-free AGM and gel cell batteries.

Is it suitable for outdoor use?
The interior is encapsulated in flame retardant epoxy to protect against moisture and vibration, making it suitable for outdoor equipment when mounted appropriately.