Battery Tender 5 AMP Selectable 12V/24V Charger & Maintainer — 5A/2.5A Switchable, Weather-Resistant

Battery Tender's 5 AMP selectable charger is a compact, screw-mountable 12V/24V unit that charges and maintains automotive, marine, and industrial batteries while offering switchable 5A or 2.5A output and durable weather resistance.

Designed for boaters, fleet managers, and equipment owners who need reliable onboard charging without constant intervention, this Battery Tender model 022-0258-DL-WH delivers a full charge then holds batteries at the correct float voltage. The unit mounts securely with integrated hardware, resists the elements, and prevents common connection mistakes with spark-proof circuitry and reverse polarity detection.

How do I switch between 12V and 24V, and between 5A and 2.5A output?

Changing voltage and current is done with the selectable switch on the housing. The control clearly toggles the charger between 12V and 24V modes and between the higher 5A charge rate and the gentler 2.5A maintainer setting.

• Visible, labeled selector switch for voltage and amperage.
• 5A for faster charging, 2.5A for maintenance or smaller batteries.
• Simple, tool-free operation for onboard adjustments.

What safety features protect my battery and installation?

This charger includes multiple safeguards to protect both battery and vehicle wiring. Built-in spark suppression and reverse polarity detection prevent accidental shorts and ensure the unit only supplies power when connections are correct.

• Spark-proof lead connection reduces fire and arc risk during hookup.
• Reverse polarity detection locks output until correct wiring is confirmed.
• Automatic transition to float mode prevents overcharging once full.

Can this be mounted on a boat or other outdoor equipment?

Yes — the housing and mounting design are made for demanding environments. The charger is screw-mountable and constructed from heavy-duty materials to withstand typical marine and industrial conditions.

• Integrated mounting points for secure, vibration-resistant installation.
• Weather-resistant housing protects electronics from moisture and dust.
• Compact footprint fits in tight onboard compartments or engine bays.

What types of batteries work with this Battery Tender unit?

This charger is suitable for a wide range of 12V and 24V lead-acid battery types commonly used in boats, RVs, utility equipment, and vehicles. It charges to full and then maintains batteries at a safe float voltage to preserve lifespan.

• Compatible with standard flooded, AGM, and other lead-acid batteries.
• Adjustable amperage suits both smaller batteries and larger deep-cycle banks.
• Works for automotive, marine, and industrial battery systems.

Who is this for? If you maintain boats, work vehicles, or heavy equipment and need a dependable onboard charger that won’t require frequent babysitting, this Battery Tender selectable 5 AMP unit is a practical choice. It fits installers who want a weather-resistant, screw-mountable device with clear safety features and simple controls — ideal for marinas, workshops, fleet vehicles, and owners who prefer set-and-forget charging performance.