About Battery Tender
Battery Tender is the flagship charger brand of Deltran, a family-owned electronics company founded in 1965 in central Florida as Deltona Transformer Corp. and now headquartered in DeLand, Florida. Still owned and operated by the Prelec family into a third generation, Deltran marked its 60th year in business in 2025. In 1988 the company introduced the Battery Tender line, one of the first fully automatic, microprocessor-controlled smart chargers sold to consumers -- a four-stage charging approach (qualification, bulk, absorption, float) that became the template the rest of the smart-charger category still follows.
The lineup has grown from that original charger into the Battery Tender Junior and Plus families, multi-bank chargers, dedicated lithium (LiFePO4) charge profiles, solar maintainers, jump starters, and battery testers. The track record shows up in independent numbers: on Amazon, the Battery Tender Junior alone carries tens of thousands of customer ratings at a 4.8-star average, and outside coverage backs up the reputation -- The Drive rated the Junior 800 an 8 out of 10 in hands-on testing, noting years of continuous reliable use where cheaper maintainers "gave up the ghost within just a few months." Battery Tender's chargers carry UL and CSA listing, meaning independent physical safety testing rather than a self-certified marking alone.
Brand website: batterytender.com
What Battery Tender makes
Battery Tender's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Battery Tender smart chargers & maintainers
Junior, Plus, and multi-bank chargers for lead-acid, AGM, Gel, and lithium batteries -- featured on RevRated — featured on RevRated
Lithium (LiFePO4) chargers
dedicated chargers and charge profiles for lithium iron phosphate batteries
Jump starters
portable lithium jump starter packs
Solar chargers & maintainers
panel-based trickle chargers for vehicles stored outdoors or off-grid
Battery testers
handheld testers for cranking and charging-system health
SAE accessories
quick-disconnect harnesses, ring terminals, and battery boxes for permanent installs
Why we recognized Battery Tender
The RevRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. Battery Tender earned it on the strength of the products below, evaluated the same way every product on this site is: bought, run on real vehicles, and judged on merit.
Battery Tender products we rated highly
Battery Tender 5A 12V Battery Charger and Maintainer
The most trusted name in smart battery charging -- Deltran's Battery Tender line invented the consumer float charger, and this UL and CSA listed 5A model holds a 4.7-star rating across 1,800-plus reviews. True multi-chemistry support for flooded lead-acid, AGM, Gel, and lithium batteries covers a household's full mix of vehicles from one unit, and the four-stage algorithm auto-detects the battery and switches to float maintenance so it can stay connected all season without overcharging.
Read the 7 Best Car Battery Chargers of 2026 guide →
Battery Tender Junior 12V 0.75A Automatic Battery Charger
The highest-rated charger in our roundup at 4.8 stars across 49,550 reviews -- the strongest combination of rating and review volume of any charger we tested, built on decades of trust in the motorcycle and powersports community. The SAE quick-disconnect harness lets the charger connect or disconnect in one click without opening the hood, and the four-step algorithm manages initialization, bulk, absorption, and float charging automatically.
Read the 7 Best Car Battery Chargers of 2026 guide →What earned Battery Tender the recognition
- Battery Tender's 5A charger is one of the products we rated highest in RevRated's battery charger testing, standing out on UL/CSA-listed safety certification and true multi-chemistry support for lead-acid, AGM, Gel, and lithium batteries.
- The Battery Tender Junior is the single highest-rated charger we tested -- 49,550-plus Amazon reviews at a 4.8-star average, the strongest combination of review volume and rating of any charger in our coverage.
- Two different Battery Tender chargers earned places among our top picks in battery charging, not a single isolated result.
- Deltran, Battery Tender's parent company, introduced the line in 1988 as one of the first fully automatic, microprocessor-controlled smart chargers sold to consumers, a four-stage charging approach still standard across the category.
- Family-owned and Florida-based since 1965 as Deltona Transformer Corp., Deltran marked 60 years in business in 2025, still run by the Prelec family into a third generation.