Down4Sound DOWN4SOUND | D4S LTO 6.0 - 12V Lithium Battery ( 3000 - 5000W )

Description Warranty Information 132 Reviews Description D4S 12 Volt LITHIUM BATTERY DETAILS ( PLEASE READ THIS ENTIRE DESCRIPTION FROM START TO FINISH FOR BEST RESULTS WITH THIS BATTERY ) You’re looking at the first ever DOWN4SOUND lithium battery! We are super excited to bring the smallest, yet most powerful lithium battery to date, in car audio! Pairing a super small footprint with tons of output makes it a win-win! For all features and specifications on why the Down4Sound LTO-6.0 should be your ONLY CHOICE for your next lithium purchase, please read more about this GAME CHANGER below. Model - LTO-6.0 cells capable of 40C, rated for 20C daily use to maintain 12v+ Designed to work directly inline with stock charging voltages (No voltage-boosting needed to achieve optimal results). Can be paired with regular 12v / non-lithium batteries with no issues. 14.8v Maximum Charge voltage (DO NOT EXCEED THIS OR BATTERY DAMAGE / FAILURE COULD OCCUR). DO NOT MOUNT UNDER THE HOOD UNDER ANY CIRCUMSTANCES AS SEVERE DAMAGE / FAILURE COULD OCCUR. Wattage Range - 3000-5000W (Depends largely on alternator input). Example - 120-160A alternator - 3000w rating 240-270A alternator - 4000w rating 320-370A alternator - 5000w rating CRAZY RECHARGE RATE (can take a High-Output alternator by itself with NO ISSUES). 6 Ah 70 Wh Battery Technology - LTO (Lithium Titanate Oxide). *We feel this is the safest lithium technology. Built-in Balancing (No other parts or assembly needed). Comes with conventional M6 terminals for ease of installation. DO NOT OVER-TIGHTEN BATTERY TERMINALS! Whether using the automotive post adapters, bolts or screws, the tightening torque should never exceed 6 ft-lbs MAX on any Down4Sound battery! USE TERMINAL BLOCKS WHEN USING IN HIGH CURRENT APPLICATION When connecting to this battery a solid, low resistance connection is suggested. Because of the high output of this battery, excessive heat can develop on and around the terminals that can cause damage to the battery housing. Do not apply an excessive load if using steel posts or other high resistance materials to connect to this battery. 1/O gauge cable or larger is recommended for all connections Lightweight & compact design Weight - 4 pounds! YES, YOU READ THAT RIGHT! FOUR POUNDS! Measurements Width - 7” Height - 4.75” Depth - 3.5” PROPER CHARGING IS CRUCIAL! Charge before initial use, be sure to read the instruction sheet for full instructions proper charging is crucial to the life of your Down4Sound battery. It is very important that the temperature of the battery remains cool with respect to the charge voltag e. CHARGING 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 important 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, over charging 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 re-charging. 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 https://www.down4soundshop.com/down4sound-d4s-chg-15a-12v-lithium-charger/ (Using a regular battery charger can damage the battery / void the warranty). STATE OF CHARGE 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 Warranty: 1 year from date of purchase against manufacture defects. TIPS LIST Read the battery label and do not exceed any of the ratings. Do not over discharge this battery. Terminal voltage should at all times remain above 10V. Disconnect when not in use. Make sure you have the correct charger. Lithium batteries are voltage sensitive so pay close attention to the max voltage rating. Do not use an undersized battery for the job esp. in applications under 32 F. If the terminal voltage under load drops below 10V the battery is too small for the job. Stop and resolve this issue before continuing. Pulse loads by their very nature are a pseudo short circuit of the battery. This is fundamentally destructive to the battery so each battery’s State of Health should be regularly checked. INSTALLATION 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 huge 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. If it is less than this after resting for 8 hours, the battery should be taken out of service and must be checked for capacity, cell balance, and State of Health before resuming operation. USAGE 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 a 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 important to get to know the limits of your battery because over discharge below 10V must be strictly avoided. WARNINGS To reduce the risk of fire or personal injury including burns: - Do not over charge the battery (meaning exceed the maximum voltage OR amperage and remove the charger once the battery is at 100% SOC.). - Do not short circuit the terminals. - Use with alternators requires that the charging voltage be limited to 14.4V or less. 13.8~14.0 is preferred for 12V models. - Do not charge this battery if the terminal voltage is below 10V. - Contact Down4Sound for assistance before proceeding. - Avoid high temperature. Never operate the battery in environments above 130oF or if the battery itself exceeds 130oF at any point. - Lithium batteries contain flammable gases. Have a plan in place to respond to possible fire. Installation inside of metal enclosures is recommended in the event of fire. - Disconnect the battery in total before welding anywhere on the vehicle. Do not submerse in water. This battery is not waterproof. - Do not crush, puncture, or dispose in fire or water. - Do not attempt to open, disassemble, or service the battery pack TESTING LTO 6.0 Standalone Testing Notes: SPL TESTING SECTION. BURPS. STANDALONE. (Wattage verified with termlab) 1,000W. 12.93 to 12.85. Immediate recovery. 2,000W. 12.93 to 12.4. 5,000W. 12.93 to 12.05. 8,000w. 12.91 to 11.12. 8,300w. 14.1 to 11.4. After the 8,300w burp, battery recovered to 12.8. A 25a lithium charger was applied. 1m 4s later, battery was floating at 14.5. Battery stud temp raised 4*, and casing raised 2-3*. ****ENGINE TURNOVER TESTING SECTION*** 4 CYLINDER TURBO TEST *first crank* 12.8 to 11.96. Next test: Vehicle accessory mode for 5 minutes, then start: 5 minutes with head lights on. Engine still started fine. Dropped to 10.9. Quickly back up on a stock charge system. Next test: Brutal engine cranking (simulating super cold temps where engine needs numerous cranks to start). 3 engine cranks in a row. 5 seconds on then turn the engine off. 5 seconds later, start again. Starting at 12.9. Dropped to 11.4 on the last of 3 starts. Same test with an AGM (D5100) Dropped to 10.9. NO STUD OR BATTERY TEMP DIFFERENCE DURING THIS TEST WAS OBSERVED. ————————————————————— 6 CYLINDER TEST 12.9 to 11.77. Battery was above 14v with stock charging in 20 seconds. No lag noticed or difficulty starting. 3 start roulette placed battery in upper 10’s. Same test as performed above. NO STUD OR BATTERY TEMP DIFFERENCE DURING THIS TEST WAS OBSERVED. ————————————————————— 8 CYLINDER TEST (V8 mustang. Naturally aspirated) 12.9 to 11.4. Battery was above 14v with stock charging in 45 seconds. No lag noticed or difficulty starting. 3 start roulette battery seen 10.9 at the last run. NO STUD OR BATTERY TEMP DIFFERENCE DURING THIS TEST WAS OBSERVED. ————————————————————— DIESEL ENGINE (POWERSTROKE) 12.9 to 10.9 . Battery was above 14v with stock charging in 1 minute. No lag noticed or difficulty starting. Ignition problems in vehicle prevented 3 start roulette. NO STUD OR BATTERY TEMP DIFFERENCE DURING THIS TEST WAS OBSERVED. ————————————————————— View All Close Warranty Information Warranty Information Your new Down4Sound product is covered by 1 limited warranty if purchased from Down4Sound or an authorized Down4Sound dealer. This warranty does not cover improper installation, accidental damage, misuse, abuse, improper wiring, operation of unit outside of listed specifications, or any product that has been modified or repaired by anyone other than Down4Sound. Your warranty covers defects in materials and/or workmanship ONLY and is not an insurance policy. The warranty only covers the original owner of the amplifier. All warranty returns must be accompanied by the original sales invoice or receipt. You must contact us to request an RMA number prior to sending any returns via the RMA request form on our websi te. You are responsible for the cost of shipping your product back to us for warranty examination. If your product is covered under warranty, shipping back to you will be at no charge to you – if your product is replaced/repaired outside of warranty you must pay for return shipping and repair bill prior returning of the product or if no defect is found you are required to pay for return shipping only. At the sole discretion of Down4Sound your product will be either repaired or replaced when it is being covered under warranty. In the event of shipping damage due to improper packaging on products being returned to Down4Sound the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return! * Extended additional warranty purchased on amplifiers take in affect from the date of purchase and must also be stated on orginal sales invoice or receipt. Refund/Return Policy: https://www.down4soundshop.com/shipping-returns/ Down4Sound - Hours of Operation Monday 6am - 9pm PDT Tuesday 6am - 9pm PDT Wednesday 6am - 9pm PDT Thursday 6am - 9pm PDT Friday 6am - 9pm PDT Saturday 8am - 4pm PDT Sunday Closed View All Close 132 Reviews 5 The best especially with it being lightweight Posted by Charles Logan on Feb 07, 2026 I gain more speed now due to the trunk having less weight. I had a big group size agm battery with a heavy speaker and box. But that agm weigh the most 3 D4s 6.0 Posted by Alex Vargas on Feb 04, 2026 Massive voltage drop. I was told 2 of these would be fine for my sfb 8k and 4-12s I have a autotek 370 alt xs power 3400 under the hood Big 3 upgrade 2/0 wire ran to the back and the rest is 1/0 wire for ground and power to the lithiums/ d- bars etc and I’m getting worse voltage drop than before I had the lithiums. My grounds are good on a 3/8 bolt straight to the chassis Double 1/0 runs from the sfb on the power and ground side. I’m guessing I need to get a 3rd battery now. Waiting to hear back from down4sound 5 D4s LTO 6.0 lithium battery Posted by Joe Campos on Jan 17, 2026 Well I kinda doubted this battery but I looked at the reviews and everyone raved about it. So I got mine because they say it's powerful it's small and thats exactly what I need my amp kept shutting down because I suspected not enough power so I gave this a shot and all I can say is it lives up to the hype already bought one more planning on get 3 cause I should only be at 10-12k watts total rite now one 3k smart amp and it handles that well gonna add another 3k and 2 battery's wish me luck. 5 LTO 6.0 Posted by Clint Chambers on Jan 05, 2026 I got this little battery to help with my 2 XS Power d3400 along with my Mechman 400 amp alt. because added a bigger amp (JP33 to be exact)!! It works as it should and the tech support was great in suggesting this to me. Very happy with my purchase!!! A+++++++ 4 Don't know yet Posted by Willie Davis on Nov 20, 2025 After buying 4 of them I would have thought I will get a free battery charger but I am putting them in this weekend and I will get back with you all 4 Don't know yet Posted by Willie Davis on Nov 20, 2025 After buying 4 of them I would have thought I will get a free battery charger but I am putting them in this weekend and I will get back with you all 5 D4S LTO 6.0 Posted by Kelton on Apr 17, 2025 Great batteries. I have 2 strapped on a taramps bass 8k. 370 amp alt. I think i need a couple more! 5 Lithium Batteries Posted by Clyde Fields on Apr 16, 2025 They are holding the power very well and I'm glad I went thise lithium batteries. 5 Excellent Product!!! Posted by Andres G Restrepo on Mar 25, 2025 Works perfectly, before I had voltage issues on my Audi Q5 with Helix PSix, PTwo and POne. My system was dropping below 11 Volts when pushed. Now it doesn't go below 12.9 volts. Big difference for such a small battery. Very pleased. 5 Thank you Posted by Roy Dominguez on Mar 21, 2025 I love it Next View All Close