Leaptrend 40 Amp DC to DC Charger for 12V Lithium Battery and AGM & Flooded & Gel & LiFePO4 Deep Cycle Batteries, On RV's, Yachts, Camper & Travel Trailers

$106.25 USD $199.99 USD

Product Description:

  • Safety First: Overvoltage protection, over temperature protection, and reverse protection are integrated into all of our chargers.
  • Universal Compatibility: Ideal for various alternator charging of RVs, commercial vehicles, boats, yachts, etc.
  • Featured Battery Protection System: Low-current charging mode offers the most effective way to protect batteries and extend battery life.
  • Compatible Multiple Battery: Running smoothly with Lead–acid battery /(VRLA), Lithium battery, Lithium iron phosphate battery.

All in Charge

The Leaptrend Altair Series 40A 12V DC-DC Battery Chargers are the most effective way to charge your house batteries from the starter battery. For additional safety, it isolates the input from the output preventing incorrect voltage transmission. Easily install the compact yet sturdy DC-DC battery charger on RVs, commercial vehicles, boats and yachts, and accommodates many types of batteries on the market, including lead-acid batteries, lithium batteries, lithium iron phosphate, etc.

Self-regulated Charging Mode

With three stages of charging (Bulk, Absorption, and Float), the DC-DC battery charger will charge your house batteries from the starter battery to ensure that they are charged to 100% automatically and optimally.

Easy To Switch In Seconds And Prolong Battery Lifespan

Our battery charger is suitable for various batteries. With just a simple turn of a switch, you can change among STD, Gel, AGM, and LFP batteries.
*A fully charged lithium battery will accelerate battery aging and affect battery life. Therefore, we adjust the charging voltage in LFP mode to 13.8V according to the charging and discharging characteristics of lithium batteries to effectively extend the battery life.

By utilizing the DC-DC temperature sensor, this charger can bring extra protection for your battery from high or low temperatures by giving -3mV/°C/2V compensation so that the charger recognizes the voltage more accurately and assures stable and constant charging to the battery.
*Caution: Please note the temperature compensation is not to be used with Lithium batteries.

Intelligent Protection

The DC-DC battery charger isolates the input and output to prevent voltage transmission errors and interfere with house battery charging. We adopt a 3-in-1 protection method including over-voltage protection, over-temperature protection, and reverse polarity protection. It ensures safety while using.

Protect Your Batteries

This Leaptrend DC-DC battery charger is compatible with traditional and advanced alternators.
The D+ Ignition cable can identify when the generator is started, in order to prevent over-discharge of the starting battery and protect the generator.
The LC wire can automatically adjust the charging current to prevent excessive charging current from damaging the house battery.
Recommend 18-16AGW or 22-20AWG copper cable.

Caution: the D+ Ignition & LC Cables are omitted.

Blog posts

2000W solar inverter

Is a 2000W Inverter Enough?

A 2000W inverter can be sufficient for a wide range of applications, from powering small kitchen appliances and home electronics to running power t...

Voir plus

Power your life, whenever, wherever.

The Altair battery charger is the perfect companion for your next adventure. It will power your camera, phone, or other electronics indoors, outdoors, in the desert, or in the wild. We've made it a priority to ensure our charger meets all your safety needs, as it is CE and UKCA certified.

You can use this element to add a quote, content...





Customer Reviews

Based on 5 reviews
Works great.. BUT.

I have the above charger, along with a 100aH LiFEPo4 battery.

My issue is that the charger only charges it to 13.8 volts before it shuts down even on the LiFEPo4 setting. The battery's "charged voltage" according to their manual is 14.2 volts. My solar charger manages to charge the battery up to its 100% charge state, there doesn't appear to be a way I can change the charged voltage in the charger to be 14 volts?

As a general rule, I'm completely satisfied with the charger OTHER than the lack of it being able to get it to 100% charge.

Tried calling their US number but "always busy".

Missing Parts
Works great

Wired directly to the car battery and works as expected. Now i can charge all my work battery while driving to n from my project sites. 👍

John Smith
Great supplement to RV solar

Finally! Finally I have power while I drive going to my RV battery. I have always relied on just solar but that’s not always a guarantee. Easy install, added a on/off switch so I can turn off the vehicle 12v so it turns off if I want. Thanks Leaptrend!

Great features

Bought a month ago and so far it works great. Just what I needed to keep my secondary battery charge on my truck and topped off.

Robert Williams
I am quite happy

So far, leaptrend products snd customer service have exceeded my expectations. I am quite happy with my 40A DC-DC Battery Charger inverter.