One charger. Two voltages. IP65 weather resistance. 2 Amp output. The Battery Tender® Plus 6V/12V 2 Amp is the most capable dual-voltage maintainer in the Battery Tender® Plus lineup — combining the voltage flexibility of a 6V/12V selector with weatherproofing for permanent outdoor installation, faster 2 Amp charging, and a 7-Year Limited Warranty that backs it all.

Dual Voltage. Full Output at Both.

The manual 6V/12V selector delivers full 2 Amp output at either voltage — not split, not reduced. Select 6V for vintage motorcycles, classic automobiles, and pre-1960s machinery; select 12V for modern vehicles, powersports, marine, and automotive applications. ISM (Infinite Sequential Monitoring™) runs its full 4-stage charging algorithm at the selected voltage, handling lead-acid batteries from 14Ah to 80Ah at both 6V and 12V.

2 Amp Output — Faster Recovery, Same ISM Precision

The 2 Amp output charges automotive and powersports batteries roughly 60% faster than a 1.25 Amp charger during the bulk charge phase — without sacrificing the precision of ISM. Larger automotive batteries recover more efficiently, while ISM's absorption phase still tapers current automatically as the battery approaches full charge to prevent overcharging at any output level.

ISM: 4-Stage Charging at Either Voltage

• Initialization — Battery health check and polarity confirmation before current flows
• Bulk Charge — Full 2 Amp output at the selected voltage restores depleted capacity efficiently
• Absorption — Current tapers automatically as the battery approaches full charge, preventing heat buildup and overcharge damage
• Float Maintenance — Precisely regulated micro-current maintains peak voltage at 6V or 12V indefinitely, 24/7, without overcharging

Compatible battery size range: 14Ah to 80Ah. All lead-acid chemistries at either voltage: flooded, AGM, gel cell, and sealed maintenance-free.

IP65 Weather Resistance — Permanent Installation Ready

IP65 certification provides complete dust protection and resistance to water jets from any direction. The Battery Tender® Plus 6V/12V 2 Amp withstands rain, spray, condensation, and outdoor humidity, making it suitable for permanent mounting in engine bays, outdoor storage structures, and locations where indoor-only chargers cannot be used. The included ring terminal harness stays permanently connected to the battery for fast, no-clamp connections every session.

6V Applications

• Vintage and pre-1960s motorcycles
• Classic and antique automobiles
• Antique tractors and farm equipment
• Pre-war and transitional-era military vehicles
• Vintage scooters and mopeds
• Classic outboard motors with 6V systems

12V Applications

• Cars, trucks, and SUVs
• Motorcycles and touring bikes
• ATVs, UTVs, and side-by-sides
• Boats and personal watercraft
• Snowmobiles and lawnmowers
• Classic and collector vehicles
• RVs and campers
• Any 12V lead-acid, AGM, or GEL battery from 14Ah to 80Ah

Automatic Temperature Compensation

At both voltage settings, charge voltage adjusts automatically based on ambient temperature — increasing in cold to ensure a complete charge, reducing in heat to prevent overcharging and gassing. Designed to perform correctly across extreme temperature ranges year-round whether mounted indoors or outdoors, without manual adjustment.

Safety Features

• Spark-proof connection — No current flows until polarity and connection are confirmed correct, protecting vehicle electronics and ECUs at either voltage
• Reverse polarity protection — Automatic shutdown if connections are reversed
• Short-circuit protection — Automatic fault detection and shutdown
• ETL and CETL certified

The Most Capable Dual-Voltage Plus

The Battery Tender® Plus 6V/12V 2 Amp combines everything in one unit: the voltage flexibility of the 6V/12V selector, the speed of 2 Amp output, the durability of IP65 weather resistance, and the permanence of a ring terminal harness installation. Sulfation — the permanent, irreversible hardening of lead sulfate on battery plates from sitting discharged — is the primary cause of premature battery failure at both voltages. The Battery Tender® Plus 6V/12V 2 Amp prevents it entirely through continuous float maintenance, extending battery life from 2–3 years to 5 years or more across every vehicle in the fleet, vintage or modern.

7-Year Limited Warranty | DeLand, Florida Since 1965