Replace batteries less often—these batteries last at least twice as long as standard sealed large-cell batteries. Use them to provide backup power for emergency lights, alarm systems, uninterruptible power supplies (UPS) for computers, and other systems that require power over a long period of time. All are dry cell, so they have an absorbed glass mat (AGM) that soaks up the electrolyte and can be used in any position except upside down. They can be recharged hundreds of times.

Warning: Batteries should always be charged and discharged in a ventilated area.

Deliver a surge of power to start automobiles and other vehicles, and provide power over a long time. These batteries are deep cycle, so they can handle many charge/deep discharge cycles. All are dry cell, so they have an absorbed glass mat (AGM) that soaks up the electrolyte and can be used in any position except upside down. They can be recharged hundreds of times.

Reserve capacity is the number of minutes that a new, fully charged battery can continuously discharge at 25 amps at 80° F. Marine cranking amps is the maximum amps that a new, fully charged battery can continuously deliver for 30 seconds at 32° F.

Warning: Batteries should always be charged and discharged in a ventilated area.

Start automobiles and other vehicles with a surge of power. These dry-cell batteries have an absorbed glass mat (AGM) that soaks up the electrolyte, so they’re usable in any position except upside down. They can be recharged hundreds of times.

Cold cranking amps is the maximum amps that a new, fully charged battery can continuously deliver for 30 seconds at 0° F.

Warning: Batteries should always be charged and discharged in a ventilated area.

After the battery is fully charged, these chargers continuously provide a low-level charge to maintain the battery without overcharging.

Chargers with reverse-polarity protection prevent sparks and short circuits if the connectors touch or if they're not connected properly to the battery.

Charge batteries even in wet environments—a sealed housing keeps water out. They have reverse-polarity protection to prevent sparks and short circuits if the ring terminals touch or if they're not connected properly to the battery. After the battery is fully charged, they continuously provide a low-level charge to maintain the battery without overcharging.

When used with lithium batteries, Style D chargers must match the battery’s lithium type.

Once fully charged, these starters store enough power to jump start a battery multiple times. All have reverse-polarity protection to prevent sparks and short circuits if the clamps touch or if they're not connected properly to a battery. They also have a USB port to charge mobile devices such as smartphones and tablets. To recharge, connect them to a USB port with the included cord.

Starters with a 12-volt vehicle plug can be charged in a vehicle outlet.

For 2,000A and 3,000A starters, use the adapter cord with the 12-volt vehicle socket to charge devices that require more power than what the USB cord delivers.

Keep batteries charged even when electricity is unavailable. These chargers can be used in any battery capacity range.

Automatic chargers continuously provide a low-level charge to maintain the battery without overcharging.

Wheel these charger/starters to batteries that need maintenance. They provide higher starting currents than Hand-Held Charger/Starters for Large-Cell Batteries. All have reverse-polarity protection to prevent sparks and short circuits if the clamps touch or if they're not connected properly to the battery.

Automatic charger/starters turn off when the battery is fully charged, but will continue to monitor the battery and turn back on if voltage drops.

Manual chargers can be set to continuously charge, or set to shut off automatically with a timer.

Small enough to carry, these charger/starters provide a 125-amp starting current. They have reverse-polarity protection to prevent sparks and short circuits if the clamps touch or if they're not connected properly to the battery. After the battery is fully charged, they continuously provide a low-level charge to maintain the battery without overcharging.

Charge up to eight batteries at once. After the battery is fully charged, these chargers continuously provide a low-level charge to maintain the battery without overcharging.

See the charge level of a large-cell battery while protecting it from power surges. These monitors also check the condition of your charging system.

Test large engine batteries that draw up to 500 amps. Turn the dial to vary the load applied to the battery to see how it performs at different loads.

Apply a fixed load to small engine batteries that draw up to 125 amps.

Tester with a 60/125-amp current load capacity offers two fixed loads. It is better for testing smaller batteries that draw up to 60 amps.

In addition to applying a fixed load to small engine batteries that draw up to 125 amps, this tester can check for defective alternator diodes.