Down4Sound D4S LTO 6.0 Car Audio Lithium Battery

posted by Chris Valentine

Down4Sound is the leading source for all car audio needs at the lowest price guaranteed. Down 4 Sound has released its first-ever lithium car audio battery at an affordable price. The D4S LTO 6.0 is here, a small Car Audio Lithium Battery that packs a ton of power. 

This lithium battery is for car audio enthusiasts looking to safely up to their voltage effectively. 

Down 4 Sound’s D4S LTO 6.0 Lithium car audio Battery information and specification: 

Weight – 4 pounds

Width – 7″

Height – 4.75″

Depth – 3.5″



Battery Technology – LTO (Lithium Titanate Oxide). Down4Sound feel is the safest lithium technology—built-in Balancing (No other parts or assembly needed).

Down4Sound designed the LTO 6.0 to work directly inline with stock charging voltages (No voltage-boosting needed to achieve optimal results). 

The D4S LTO 6.0 can be paired with regular 12v / non-lithium batteries with no issues. This means you can pair the D4S LTO 6.0 car audio lithium battery to an under-the-hood AGM Battery.

Wattage Range – 3000-5000W (Depends largely on alternator input).


120-160A alternator – 3000w rating

240-270A alternator – 4000w rating

320-370A alternator – 5000w rating


The D4S LTO 6.0 comes with conventional M6 terminals for ease of installation. Down4sound recommends you do not over tighten the terminal. Whether using the automotive post adapters, bolts, or screws, the tightening torque should never exceed 6 ft-lbs MAX on any Down4Sound battery. Use wire distribution block terminals when adding multiple connections.


Typically the battery will ship at less than 100% State of Charge (SOC.) Please charge your new battery immediately upon receipt. For charging your 12V Lithium battery, we recommend a battery charger specifically designed for lithium batteries. Lithium batteries are by their very nature voltage-sensitive. Further, the lithium battery is the most vulnerable to damage while charging. It is essential that the charging process of the battery be fully understood and carefully controlled. Do not use a battery charger designed for “Flooded” or “Maintenance Free” batteries. Do not use a battery charger with a “de-sulfa-tion mode” or “float mode”. USING THIS STYLE OF CHARGER WILL CAUSE DAMAGE / FAILURE AND VOID WARRANTY. Remove the battery charger once the battery is full, meaning 100% State of Charge. Unlike lead-acid batteries, overcharging lithium batteries does not help them nor cause them to store more power. Instead, it harms them and should be strictly avoided. Lithium cells are in a state of stress when at 100% SoC and beyond. Continuous charging must be avoided. Lithium batteries do not have a “memory effect” therefore, they do not have to be empty to benefit from recharging. Simply recharge them when convenient and avoid overcharging. In general, float charging or battery maintain-ing should be avoided. Can be charged at a rate of 60A continuous, 400A 10 sec

If you want to charge this battery with a battery charger, it MUST BE A LITHIUM BATTERY CHARGER, such as Li25 from XS POWER.

(Using a regular battery charger can damage the battery/void the warranty).


100% – 13.6V

96% – 13.2V

77% – 12.8V

54% – 12.4V

25% – 12V

10% – 11.6V 

8% – 11.2V

5% – 10.8V

1% – 10.4V

0% – 10V

The D4S LTO 6.0 Warranty: 1 year from date of purchase against manufacture defects.


You may mount the lithium battery in any direction as long as it is secured from short circuits and/or movement. One word of caution, though. This battery is very light, and therefore it does not require a great deal of force to hold it. Do not crush the battery with battery retention systems. The threads are M6-1.0. Optional mounting kits and terminals are available. Observe the maximum torque ratings on the battery label. Be extremely careful when making connections. Remember, there is no low voltage disconnect, reverse polarity, or short circuit protection on the main terminals of this battery. Further, the power output of a lithium battery is four times that of typical lead-acid batteries. Short circuits will flow vast amounts of current instantly with the ability to melt metal. Do not expose to temperatures above 60oC (140oF). Avoid mounting this battery in the engine compartment, if at all possible. Elevated temperatures accelerate the aging process of most battery types, and lithium batteries are especially sensitive to high temperatures. Open circuit voltage should be above 12V when fully charged after resting for 8 hours. The battery should be taken out of service if it is less than this after resting for 8 hours. It must be checked for capacity, cell balance, and the State of Health before resuming operation.


In general, the lithium battery will outperform the lead-acid battery it is replacing. If it does not, chances are you have a battery that is too small for the job. Stop now, take it out and return it for the correctly sized model. In general, pulling the battery’s terminal voltage below 10V for even the shortest amount of time is asking for premature failure. This must be avoided. Lithium batteries have a relatively flat discharge curve when compared to a lead-acid battery. The good news is that the average terminal voltage throughout discharge will be 12.5V for 12V models. Unfortunately, this can make judging the state of charge difficult when the battery is near empty. Lithium batteries at a low state of charge will still show a relatively high voltage. It is vital to know the limits of your battery because over discharge below 10V must be strictly avoided.

The D4S LTO 6.0 is a revolutionary lithium battery. Small, Compact, Safe; Get this Car Audio Lithium Battery a Down4Sound.

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