Battery Tender Junior 12V 800mA Battery Charger and Maintainer (Lead Acid & Lithium)
CarCareTruth Score
Recommended.
Priced as of June 2, 2026
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Prices may varyThe Podium · Top 3 in Battery Charger / Maintainer
See the full ranking →This product ranks #13 of 18 in Battery Charger / Maintainer.Three above it ↓
CarCareTruth's Analysis
Last reviewed June 2, 2026
TL;DR Reliably maintains 12V FLA, AGM, GEL, and LiFePO4 batteries via a push-button chemistry selector. Long-term storage reviews confirm the float mode works. UL and ETL are listed on Amazon but unverified in either certification database.
What it is and how it performs
An 800mA maintainer with an ISM microcontroller that adapts the charge sequence in real time. Community confirms reliable maintenance on motorcycles, ATVs, and small cars. Key limit: will not recover a fully dead battery — a minimum voltage must be present first. Alligator clips and fused ring terminals are both included; the ring terminal pigtail is praised for permanent-mount use.
Who should buy this — and who should skip it
Best for seasonal vehicle owners wanting a set-and-forget maintainer. Skip it if your battery is completely dead — you need a higher-amperage charger first.
Safety and environmental impact
UL and ETL are claimed on the listing but unverified in the certification databases; this is reflected in quality, not health. Charging lead-acid batteries without airflow produces hydrogen gas — use in a ventilated area. Dispose through standard e-waste drop-off.
From the manufacturer
Marketing copy from Battery Tender, via Amazon. Not editorial.
- •Stay Charged: 12V Battery Charger, 800mA Selectable Lead Acid/Lithium Battery Charger It will keep your battery fully charged so that it is ready to go when you are
- •Lead Acid and Lithium: Power lead-acid (AGM, flooded, or gel) or lithium (LiFePO4) batteries with this smart charger and maintainer by switching to the desired battery type with the push of a button
- •Smart Technology: An ISM microcontroller constantly updates charge sequence to ensure the proper level is sent to your motorcycle, ATV, UTV, personal watercraft, or scooter battery at all times. Smarter than a trickle charger
- •Easy to Use: A low maintenance design that's quick and easy to use, our powersport 12v battery charger and maintainer is lightweight and compact allowing it to operate everywhere even in small spaces
- •Safe and Secure: Our 12V battery charger and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power. It is ETL US/CSA, FCC, ICES, BC, certified including a 5 Year Industry Leading Warranty
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Battery Tender
- Color
- Black, Green
- Product Dimensions
- 4.4"D x 2.9"W x 2.15"H
- Item Weight
- 0.01 Ounces
- Output Voltage
- 12 Volts (DC)
- Input Voltage
- 12 Volts
- Amperage
- 0.8 Amps
- Compatible Devices
- Lead-acid batteries (AGM, flooded, or gel), Lithium batteries (LiFePO4)
- Connector Type Used on Cable
- Alligator Clips and Fused Ring Terminals
- Number of Ports
- 1
- Item Dimensions D x W x H
- 4.4"D x 2.9"W x 2.15"H
- Specification Met
- UL, CSA, BC, FCC
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