Battery Tender Battery Charger 800 mA SuperSmart — Encapsulated Waterproof 12V Maintainer for Motorcycles & Boats

The Battery Tender 800 is a compact, fully automatic 800 mA SuperSmart charger that continuously monitors, charges, and maintains lead-acid batteries while its encapsulated housing provides moisture and vibration protection.

Designed for riders, boaters, and outdoor vehicle owners who need reliable battery care, the Battery Tender 800 combines an intelligent charging algorithm with a rugged, fully encapsulated enclosure. It delivers steady 800 mA charging, automatically transitions to maintenance mode once the battery is full, and accepts 100–240 VAC worldwide. Small enough to fit beside electronics yet tough enough to resist shock and water intrusion, this charger is built for demanding, wet, and mobile environments.

How does the Battery Tender 800 protect my battery from overcharging?

The built-in SuperSmart microcontroller continuously assesses battery voltage and adjusts charging to prevent overcharge. It brings the battery to a full charge, then switches to a float/maintenance stage that supplies only the current needed to keep the battery stable without causing damage.

• Automatic multi-stage charging: bulk, absorption, float
• Continuous monitoring by an integrated IC chip
• Maintenance/float mode prevents trickle overcharge
• Spark-proof and reverse polarity protection for safe connection

Is this charger safe to use outdoors or in wet conditions?

The Battery Tender 800 is fully encapsulated in a flame-retardant, thermally conductive epoxy that protects internal electronics from moisture, vibration, and shock. The rugged construction and waterproof design make it suitable for ATVs, motorcycles, boats, or any equipment exposed to rain, spray, or splashes.

• Epoxy-encapsulated electronics resist water and vibration
• UL-recognized compound for flame retardancy and thermal performance
• Operates reliably even if briefly submerged or splashed
• Compact, mountable housing for secure outdoor installation

Will this charger work when I travel internationally?

Yes. The Battery Tender 800 accepts a universal input range of 100–240 VAC at 50/60 Hz, so you can use it worldwide without an external converter. Its lightweight design and small footprint make it easy to pack with tools or stow in a vehicle or boat locker.

• Universal input voltage: 100–240 VAC, 50/60 Hz
• Compact size similar to a computer mouse for easy transport
• Lightweight and mountable for onboard or garage use
• Works with common 12 V lead-acid batteries used in powersports and marine applications

How easy is it to install and operate?

Operation is simple: connect to the battery with the supplied leads or ring terminals, plug into AC power, and the charger handles the rest. Safety features such as reverse polarity and short-circuit protection reduce user error, while the automatic maintenance cycle means you don’t need to babysit the charger.

• Plug-and-play: simple connection and automatic charging
• Spark-proof clips and reverse polarity protection for safe hookups
• No manual switching—automatic transition to maintenance mode
• Mountable design for permanent or temporary installations

Who this is for: Riders, boat owners, and powersports enthusiasts who want a dependable, low-maintenance charging solution that stands up to wet or mobile conditions. If you need a small yet robust 800 mA charger for maintaining 12 V lead-acid batteries—especially when exposure to moisture, vibration, or travel is likely—the Battery Tender 800 delivers intelligent charging performance in a weather-resistant package.