12 VOLT BATTERY CHARGERS

$49.95 NOCO Genius2 2 Amp 6/12 Volt Charger

$82 Schauer 5 Amp 12V Battery Charger JAC0512	$93 Schauer 12 Amp 12V Battery Charger JAC1212

$90 Pulsetech 100X010 XC100 Charger/Desulfator

$277 Dual Pro 10 Bank .5 Amp Charger/Maintainer Sentinel 10

$172 Samlex 15 Amp 12V Battery Charger SEC1215UL	$240 Samlex 30 Amp 12V Battery Charger SEC-1230UL

$437 Samlex 50 Amp 12V Battery Charger SEC-1250UL	$620 Samlex 80 Amp 12V Battery Charger SEC-1280UL

IOTA DLS-15 15 Amp Battery Charger $163	IOTA DLS-30 30 Amp Battery Charger $175	IOTA DLS-45 45 Amp Battery Charger $193

IOTA DLS-55 55 Amp Battery Charger $200	IOTA DLS-75 75 Amp Battery Charger $273	IOTA DLS-90 90 Amp Battery Charger $287

PowerMax PM3-35 35 Amp Battery Charger $135	PowerMax PM3-45 45 Amp Battery Charger $155	PowerMax PM3-55 55 Amp Battery Charger $169

PowerMax PM3-75 75 Amp Battery Charger $225	PowerMax PM3-100 100 Amp Battery Charger $245	PowerMax PM3-120 120 Amp Battery Charger $255

$128 Recreation Series 6 amp 12V Battery Charger RS1	$210 Dual Pro Sportsman 10 amp 12V Battery Charger SS1	$254 Dual Pro PRO 15 amp 12V Battery Charger PS1

Quick Charge Select-A-Charge On Board Battery Chargers 12 Volt in 25 or 35 Amps	Quick Charge Standard On Board Battery Chargers 12 Volt in 10,15,25,35 Amps

Quick Charge Programmable Portable Industrial Battery Chargers 12 Volt in 25,40 Amp	Quick Charge Portable Industrial Battery Chargers 12 Volt in 10,25,40 Amp

Quick Charge Select-A-Charge 12 Volt 60 Amp Industrial Battery Charger

Microprocessor Controlled 12 Volt Battery Chargers

We offer industrial quality 12 volt battery chargers in amperages from 1.1 amps to 120 amps. Most are switch mode design, microprocessor controlled, which allows for smaller components, less heat generation (loss), and therefore fewer thermal management problems. Each 12 volt charger is a so called "smart" charger, utilizing multi stage charging, which provides efficient charging. The microprocessor takes information from the battery (voltage) and regulates the charge current to achieve maximum charge value without harming the battery, and ends the charge in a maintenance mode, suitable for long periods or storage. These features are considerable improvements over old battery charging technology, and eliminate undercharging or overcharging, both of which are detrimental to battery health. With an industrial quality 12 volt battery charger, you can attach and forget, and get maximum battery life and health. These are not the type of units you find in a department type store, and they may cost a little more, but the improvement in battery life, or proper operation of your prototype/production project more than pays the difference. There are some multi-purpose 6/12 volt and 12/24 volt units here as well.

The Schauer, Samlex, and some Quick Charge chargers are 3 stage units, providing up to the battery charger maximum output amperage(constant current), and monitoring of the charge voltage as it rises to the absorption set point. The absorption set point is generally between 14.1 volts DC and 14.7 volts DC in a 12 volt charger. The charger then maintains the absorption voltage (constant voltage) until the battery is fully charged (second stage). At this point, the charger drops the output voltage to the 3rd, or "float" stage, which is safe for long term battery maintenance. This float stage voltage is between 13.2 and 13.7 volts DC in a 12 volt battery charger.

12 Volt Charger Float Mode

The float stage in a microprocessor controlled battery charger is an excellent application of new technology in this computer age. Older 12 volt battery trickle chargers usually maintained a current level that was too high for long term maintenance, and overcharged batteries, thus requiring constant monitoring. The new chargers can be left connected for indeterminant periods, and the microprocessor only applies enough current (at the float voltage) to compensate for internal discharge.

Lead Acid Battery Internal Discharge

This internal discharge (self-discharge) is a common characteristic of lead acid batteries, but varies with battery type. The wet, or flooded lead acid batteries are constructed of a lead-antimony alloy, to provide structural strength to the battery. This lead-antimony alloy construction leads to internal discharge rates of 8% to 40% per month in a wet lead acid battery. The sealed lead acid (SLA) types, Absorbed Glass Mat (AGM) and Gel, use a lead-calcium alloy, which is not of the same mechanical strength as the lead-antimony, since the construction (mats between the plates in the AGM battery, gelled electrolyte in the gel cell) stabilizes the battery structure. The lead-calcium batteries have a lower internal discharge rate, between 2% and 10% per month. This internal discharge leads to suphation of the battery plates, which can harden and either reduce battery capacity, or destroy its ability to be recharged. A significant percentage of lead acid battery failure is from sulphation. Proper battery charging and use of floating chargers reduces or eliminates the sulphation problem.

Samlex Chargers As Power Supplies

The Samlex 12 volt chargers SEC-1215UL, SEC-1230UL, and SEC-1250UL are dip switch settable to deactivate the boost mode to function as a power supply at the float voltage, for backup power systems (UPS) for example, or power supply applications up to their rated output amperage. The Samlex chargers are also dip switch settable for true gel batteries ( gel cell ) and are user selectable for 115 VAC or 230 VAC input.

The Dual Pro Marine Grade Battery Charger

The Dual Pro marine battery chargers are 12 volt independent output, 6, 10, and 15 amp, single output, temperature compensating battery chargers. They are a waterproof charger, and fully potted for vibration resistance. Most are available as portable units, with alligator clips. They are robust and durable chargers, which can be mounted and hard wired in a severe duty application for years of trouble free service. Most are also built in the USA, which is not particularly common for electronic items any more.

The Dual Pro 12 volt charger, in marine grade, is appropriate for applications where an exterior grade battery charger is required or desired. They have mounting flanges, and will endure water, vibration, and temperature. They are used in marine applications, like boats with a single battery for starting or trolling. We also use these for generator starting batteries and similar applications.

The Quick Charge 12 volt offerings include portable type chargers with handles, available with alligator clips or various industrial connectors, and on board units for mounting on industrial equipment or electric vehicles. There are also 60 amp industrial units. These are also built in the US and have a 3 year warranty.

Battery Doc supplies us with a 2 amp waterproof charger/maintainer. These come with detachable alligator clips, or ring terminals which can be permanently attached to a motorcycle, ATV, jetski, automotive, etc. 12 volt battery for plug-and-play battery maintenance.

Check out our selection from Schauer, Samlex America, Quick Charge,and Dual Pro, if you are in the market for a 12 volt charger. At ChargingChargers.com, we select our battery chargers for reliability, design and function, warranty, and value. We can help with selection or advice by email (info@chargingchargers.com) or our tech line: (541) 582-4629. We deal with case pricing for quantity users.

For more information, see our battery charging tutorial.

Charger Quality

ChargingChargers.com stocks commercial quality 12 volt battery chargers for marine, RV, automotive, electronic/security, industrial, and military applications. The cost of these units over department store type units is made up in efficiency and proper battery charging profiles, which translates into maximum battery life, and long term reliability. Most of these units are rated for 100% duty cycle, which means they can function at full amp load for extended periods.

Frequently asked questions about battery charging

Be sure to check out our Tutorials!