BatteryJack inc. 12V Battery Charger Tender Boat Car Motorcycle Watercraft
A 12 V charger that maintains and charges batteries in cars, motorcycles, boats, farm machinery and RVs using multiple connectors, with a 0.75 to 1.25 A output from 100 to 240 V input
- Maintains 12 V batteries with 0.75–1.25 A charge current
- Charges from 100–240 V AC input worldwide
- Waterproof design suits boat and watercraft use
- Multiple connectors fit cars, motorcycles, farm and RV batteries
- Two-year warranty backs long-term reliability
Multipurpose 12V Battery Maintainer
This charger maintains 12V lead-acid batteries across cars, motorcycles, boats, farm machinery and RVs. It accepts a universal 100 to 240V AC input and delivers a regulated 12V DC output at 0.75 to 1.25A. Multiple connectors are included for quick attachment to various battery terminals. The unit is waterproof and backed by a two-year warranty.
Build Integration And Space Saving
The compact tender connects directly to a wall outlet and the battery, requiring no permanent installation or additional mounting hardware. Its low-amperage float mode freases you from monitoring charge levels during seasonal storage. Waterproof construction allows permanent mounting on exposed vehicle frames or marine bulkheads without a separate enclosure.
Sustained Load Behaviour
Under continuous operation the charger holds the output between 0.75 and 1.25A, automatically tapering current as the battery reaches full charge. Thermal regulation prevents overheating during indefinite float periods. The waterproof seal maintains integrity through repeated thermal cycles in outdoor environments.
How it compares
Measured against everything we stock in Jump Starters, Chargers & Power Packs, at today’s prices. Recalculated every night.
- Price $21.99
- Pricier than about 70% of the 1,744 comparable items (median $14.99).
Specifications
No published specifications for this item yet.
Questions about this item
Will the 1.25A output limit how quickly a deeply discharged battery can be recovered?
The charger supplies up to 1.25A at 12V, so a fully drained battery will recharge slowly compared with higher-amperage units.
Does the sealed waterproof housing run hot or make noise during continuous 24-hour operation?
The waterproof enclosure has no fan; it dissipates heat passively and operates silently even when left connected all day.
Which battery connector does the included harness use so I know it fits my vehicle?
The package provides multiple connectors, typically ring terminals and alligator clips, covering most automotive, marine and motorcycle terminals.
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