Complete coverage
Battery Chargers
Smart battery chargers and maintainers ranked on charge rate, chemistry support, and recovery features.
A battery charger and a jump starter solve different problems. A jump starter gets a dead car moving once; a smart charger actually restores the battery, and a maintainer keeps a stored vehicle ready for months. The numbers that matter are charge amperage, supported chemistries (flooded, AGM, gel, and lithium LiFePO4), and whether the unit has a true float or maintenance mode that will not cook the battery it is protecting.
The ten chargers below are all fully automatic smart units sold on Amazon, from 750mA maintainers meant for a motorcycle in winter storage to a 15-amp bench charger that can revive a deeply discharged truck battery. None of these is a jump starter; for emergency starting power, see our portable jump starters guide instead.
Every guide on battery chargers
12 guides
Best of
The Best Battery Chargers (2027)
The best car battery chargers and maintainers for 2027, ranked on charge rate, chemistry support, repair modes, and safe long-term maintenance.
Read guide
For winter storage
The Best Battery Chargers for Winter Storage (2027)
The best battery maintainers for winter storage in 2027: safe float charging for cars, motorcycles, and classics that sit for months.
Read guide
For AGM batteries
The Best Battery Chargers for AGM Batteries (2027)
The best chargers for AGM batteries in 2027: correct AGM voltage profiles, temperature compensation, and recovery modes.
Read guide
For motorcycles
The Best Battery Chargers for Motorcycles (2027)
The best motorcycle battery chargers and maintainers for 2027: gentle low-amp charging matched to small powersports batteries.
Read guide
Review
NOCO GENIUS10 Review (2027)
NOCO GENIUS10 · A 10-amp smart charger with thermal compensation and a repair mode.
Read guide
Review
CTEK MXS 5.0 Review (2027)
CTEK MXS 5.0 · An eight-step Swedish charger with AGM mode and automatic temperature compensation.
Read guide
Review
Battery Tender Plus 1.25A Review (2027)
Battery Tender Plus 1.25A · The original smart maintainer, with a four-step charge and a 10-year warranty.
Read guide
Review
NOCO GENIUS2 Review (2027)
NOCO GENIUS2 · A 2-amp smart charger with thermal compensation and a lithium mode, sized for bikes and cars alike.
Read guide
Head to head
NOCO GENIUS10 vs GENIUS5 (2027)
Head-to-head: NOCO GENIUS10 versus GENIUS5 on charge speed, battery capacity, and which one your garage actually needs.
Read guide
Head to head
CTEK MXS 5.0 vs Battery Tender Plus (2027)
Head-to-head: CTEK MXS 5.0 versus Battery Tender Plus on charge programs, AGM support, speed, and storage duty.
Read guide
Buying guide
Battery Chargers Buying Guide (2027)
How to choose a car battery charger in 2027: amperage, smart versus trickle, AGM and lithium profiles, and maintenance modes explained.
Read guide
Fix it
Battery Charger Not Charging? Fixes (2027)
Why your battery charger will not start, stops early, or shows an error: low voltage lockout, bad connections, sulfation, and failing batteries.
Read guide