If you need more power and your headlights dim from those darn caps then get one of these because it will solve your issues. 1200 watts rms and under hands down. DON'T GET A CAP GET THIS. My voltage with cap: 11.3 volts drop. With this: 13.5 on 1150rms in a honda civic with stock alt and batt and 4 gauge. Boom! There it is. NO Brainer and Sonic is a great company that supplies great products, thanks guys!!
12V High Performance AGM Power Cell Battery for Systems Up To 600 Watts
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If you're adding a second battery for your Audio System you should add a Battery Isolator. Buy them together and save 10%. Simply Click the "Add Both to Cart" button to the right. Offer cannot be combined with any other coupons or offers.
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SHURiKEN AGM Car Audio Power Cell
This SHURiKEN 12-Volt Car Audio Power Cell features a sealed absorbed glass mat (AGM) design and is perfect for 600-watt car audio sound systems. The SK-BT20 can be used as a replacement for your vehicles standard battery or as an additional battery to provide the extra power needed for a high performance aftermarket system. It's unique spill free design allows this power cell to fit in most factory battery locations with no hazardous leaks.
SHURiKEN's SK-BT20 Power Cell has a 20 amp hour rating and will resist extreme heat conditions and vibrations and is 100% sealed in a reinforced ABS plastic case. SHURiKEN has designed this power cell to be used with ring terminals or a buss bar. You will love the way SHURiKEN batteries get your system powered up and ready to go!
- 12V High Performance AGM Car Battery
- For use with audio systems up to 600 watts
- Engineered specifically to meet the needs of a high end audio system
- Using AGM (Absorbed Glass Matt) technology allows the battery to be mounted in any position
- Unique spill free design
- Extreme heat resistance
- Resistant to heavy vibrations
- Super low ESR
- Packed closely with pure lead plates
- 100% Sealed and maintenance free
- Designed to be used with ring terminals or a buss bar
- SAE Posts available: Shuriken SK-SAE20
- Wing Nuts with Posts available: Shuriken SK-WN120
- Authorized Internet Dealer
- 1-year Manufacturer's warranty
- Amp Hours: 20
- Compatible System Wattage: 600
- Weight: 13.5 lbs.
- Dimensions: 3"D x 7.5"W x 6.5"H
Warranty and Return Policy
Summary of Customer Ratings & Reviews
Belhaven north Carolina
Lake Jackson, TX
July 23, 2013
I recently purhased 2 Shuriken SK-BT20 batteries. One of them failed for some odd reason. I contacted Sonic and they immediately arranged for a return. I received the replacement battery in a very short time. These batteries are very well made and the AGM constuction allows for several installation options.
68 of 81 found this helpful
August 19, 2012
I use this battery to power two on-board air compressors for air bag suspension on my "pimped-out" caravan. The voltage usually sits at about 12.8~13vdc and never sags below 12vdc whenever my compressors kick in. Did I forget to mention, all my audio is powered off this same little battery. I added a disconnect relay between my main battery and the Shuriken which is controlled by a switch so I can charge the battery when I'm driving or I can let it stand alone for a while and it does a good job. Well worth the money, I will buy more as needed for my other vehicles.
66 of 77 found this helpful
August 24, 2010
I got this to replace the old lead acid battery in my CRX and it's a great battery. I relocated it to the compartment behind my seats and it fits great. I've never had any problems with it, and I'm using it as the main battery for my car.
69 of 83 found this helpful
March 6, 2012
I have this little guy in an icechest radio powering a kenwood kac-8405 amp pushing a pair of Polk db6901 speakers and a 10" sub. It will play at super loud volumes for at least 6 hrs. I haven't seen how much longer it will go. It charges fast and weighs almost nothing. I replaced a 45lb marine battery with this and am much happier when I have to lug around my radio. There are 2 audio shops in town with this battery and they want $145 for it. Sonic Electronix has the best prices I have seen anywhere.
64 of 77 found this helpful
October 11, 2011
This is a great battery! It's sealed lead acid, so it can be installed at any angle. I use this battery to power a digital media player and small amplifier with two 6 by 9 inch speakers in a standalone "boombox" audio unit. The battery lasts a really long time, and I've never had a problem with it.
64 of 77 found this helpful
July 23, 2013
I've had it since January 2013. Ordered from Sonic. I was building my first music system for my car and had the Pioneer DEH-15UB HU,
Pioneer 6 1/2 speakers in the front doors, Sony Xplot 6 X 9 speakers on the Rear Deck, the Alpine MRP-F300 4 ch amp and two 10" Sony
Xplod subwoofers in a sealed enclosure.
I was going through blogs and reviews about Voltage drop, headlight dimming, and the discharge of the main Battery when the Bass hits.
I was considering purchasing a capacitor because I wanted my music to sound great and was afraid of draining the main battery. My
neighbor had a two amp system with a 6 Farad capacitor in his car, and it looked great. He kept telling me that he usually spent
much time listening to music with the engine off and that he would never had a problem.
Going through the Sonic's webpage, I discovered the vast array of AGM batteries available and after some thinking I decided to try.
I purchased this BT-20 'cause of the price and I knew I did not have a 2000+ watt system. I took it to AutoZone for a pro
installation and they installed the battery in the trunk, in parallel with the main battery without an isolator.
The experience was great. My music sounded with an extra punch and I used to test the music at loud volume for extended periods and
it never discharged.
Today I'm using a 2 amp system. I'm still using the Pioneer DEH-15UB. In the front doors I have 6.5" mid woofers, the same 6 X 9
speakers on the Rear Deck. They are connected to the same Alpine V-Power 4 ch. Plus I'm using one of the 10" subs in a vented
enclosure on the floor behind the driver's seat, and it's connected to the Boss Phantom 1502MW Mono power amp. The two amps connected
to this BT-20 which is now located inside the car, hidden, beyond the area where the passenger rest their feet. I have everything
inside the car, the amplifiers under the seats.
I added the NVX BIR80 80 amp isolator. the experience is even better. The music sounds awesome. It's loud and clear, no distortion.
And I always push it, listening to music for 2 hours or so with the engine off. The 4 ch amp is rated at 300 watts RMS and the mono amp,
350 watt RMS when driving a single 4 ohm sub. That's pretty much the load I'm placing onto the BT-20.
I haven't actually measured the voltage when driving the two amps, but according to what I hear when I listen to music, it's all good. I
cannot say how long it takes to fully recharge it, but I've never had a problem.
I recommend this Shuriken BT-20. It works for me. It has never been fully discharged yet. It's driving my two power amplifiers well. The
music sounds great, with that extra punch. Plus the main battery draining is not a concern anymore, hehehe.
61 of 72 found this helpful
September 17, 2012
Needed a small battery for my Skyline as 1/2 the original location is being used for a catch tank. No problems starting my car and have room to spare. Not sure how long it will last as a primary battery but so far it's been great.
63 of 76 found this helpful
Los Angeles, CA
June 11, 2012
I used the battery as a second battery for my stereo system in my car. The battery is very compact and it took place of a much more expensive capacitor. Since it's a dry cell its mounted sideways and it has no problems powering my system without draining my main battery. Only downside is that I had to find hardware to mount things to the terminals.
63 of 77 found this helpful
May 17, 2012
I bought two of these BT-20's. I installed only one in the back of my CRX with all 4 gauge wiring for power including 4 gauge from alternator and 2 gauge for ground. I was so surprised how well it worked. It handled the main car power and did its best for the car audio and all vehicle accessories.
So, then I installed 2 in line with a power cap. Amazing difference. I have pushed and punished these tough little batteries to the test and not once have I had any issues. Been installed for about 1 year now. If you are thinking about the BT-20 you will be good to go.
In my opinon there is no need for a power cap, but I seem to overkill. The BT-20 will take care of light dimming issues. Buy one or many and use for any vehicle or car audio power needs you might have. The power ratings are true to specs.
60 of 72 found this helpful
March 19, 2011
After installing an aftermarket front mount intercooler I had to get rid of the factory size battery. This one fit the bill. Not only is it smaller, it packs more CCA than my old one. Shopping around online I found SonicElectronix to have the best price too. Only issue is that it didn't come with terminals.
57 of 66 found this helpful
October 29, 2012
These batteries are fantastic. Don't let the small size fool you. I'm using two of these together with my stock battery to run a 2400w rms amp and voltage is always above 12.5 at full (clear) volume. My only issue is that the posts on them are kinda small and use a small Philips type bolt but it works ok.
I've been an installer for over 15 years and definitely recommend these.
59 of 71 found this helpful
Johns Creek, Ga
October 23, 2011
I was having severe voltage drop in my car running 900w rms on the stock battery so I decided to replace it with two of these wired in parallel. They work great. Before my voltage was dropping down from 14.4 to 11.9 and now it stays around 13.5 with my system cranked and dips down to 13.1 on bass tests. None the less, these batteries pack a punch for a small package.
61 of 75 found this helpful
January 14, 2013
For occasional use it doesn't hold it's charge very well. I've got it on a boat and we only get out a couple times a month. The charge falls between uses every time. Once the alternator has charged it back up it's fine, and it only powers the radio so that's okay. I wish it held its charge better though...
54 of 65 found this helpful
Twentynine Palms, CA
October 20, 2010
I got 4 of these little suckers together in my mustangs trunk. With an Ohio generator 220amp alternator under the hood, these things keep a near constant 15 volts going into my audiopipe 3000d. Sick little batteries, love em to death!
52 of 62 found this helpful
April 11, 2012
Half the size and better specs than my main battery. I got this so I can crank longer at parties. Pair it with an isolator and you are good to go. Very easy to connect and mount. I have been able to run the stereo for DAYS (not continuous) on this battery while testing. I am happy with my purchase.
52 of 63 found this helpful
July 8, 2011
I installed this battery in my trunk to help power a 3000w amp, pushing 2 550w RMS subs, and it has worked WONDERS. I maintain constant voltage over 13.5v with the help of this battery even during the most hard hitting bass sessions. I did have a little bit of leakage from the negative battery post due to insecure mounting, but once I got it secured and took the stress off the terminals I had no issues. Great product, great value, definitely serves it's purpose and does it well.
52 of 63 found this helpful
San Diego, CA
west lafayette, IN
May 11, 2011
I bought the Shuriken sk-bt20 a few months ago in its n my trunk, this thing does the work lights do not dim out no more at all, worth price pretty cheap, i seen prices on it in its up there. i now have four of these shuriken n one used for running car.
50 of 59 found this helpful
January 16, 2014
Decided to add an extra battery for my system instead of using a capacitor and it works perfectly! Placed it in the trunk in an mdf box with zip ties to keep it in place. Also don't forget to use a battery isolator relay so you can avoid draining your main battery when the car is turned off!
52 of 65 found this helpful
December 6, 2012
I have an 08 Jeep liberty with 8 13.5" JL Audio subs and I have a JL HD 1200/1 on each sub and then I have the focal k2s 3 way component set one in front and one in the rear and I have 3 JL HD 600/4 on those yes I know you don't need that much going to the two component sets but I'm running an all active set up with processor and believe it or not I'm using just two of these batteries and boy you should feel the POWER in fact if you get within a half mile of me you will feel the power
49 of 59 found this helpful
November 21, 2012
I bought two of these to run over 2000w RMS of bass. Now let me say: before I got these, I was getting severe volt drop (down to 10.9v) and bad light dimming with hard bass (people thought I was flashing them lol). I was kinda "shocked" lol that although I am running these far above what they are recommended for, I no longer get my lights dimming and voltage does not drop below 12.5 EVER. ZERO dimming lights and I still have the stock alternator. Highly recommended!
47 of 56 found this helpful
July 5, 2011
If your system needs more than a capacitor this is great choice. I had 2 Kicker dual coil 10inch subs and a 15inch with a 1800w Kenwood a 760w Pioneer, and 320w Alpine for my speakers. Then a custom computer with touch screen to run it all powered by 900w inverter. The battery ran all of this very well and never let my amps get depleted and none of the lights dimmed. GREAT PRODUCT
50 of 62 found this helpful
April 8, 2011
I bought this battery for my system to stop the dimming and so far it's working. The battery is rated for a 600 watt amp and my system is a little more but with the two caps with it I think it will be just fine. My sub amp is a Phoenix gold RDS 1200 mono and I have a MA 600 (more like 400 if I'm lucky) running the the 6x9's. I have two Kicker 10CVX102 (L7 but round), I just have one the other one I had to send back and they replaced it, so I cant' wait to put in with the other. I also put a 80 amp iso by Stinger so I won't have to worry about a discharge from the main battery. Here's the thing why pay more when you get the same thing for less. It's a good Battery and I would do two things with it, one a breaker or fuse for the second battery and the iso so you won't worry. Almost the whole system I have bought through Sonic, so you can't go wrong.
48 of 58 found this helpful
July 2, 2012
This is a small compact battery with a little weight to it. Try reaching to pick it up with one hand and you'll buck ya eyes when you try to pull up. This was my 1st battery in the trunk. It got the job done. Had 2 amps being powered off it. I was just in the intro stages of car audio. This is a good buy though
48 of 59 found this helpful
Sherman Oaks, CA
November 2, 2011
My car was having Voltage drop issues. With a capacitor it improved the sound quality but still had the drop . Decided to go with this battery instead of the Kinetic850 because its cheaper. "Not Cheaper in Quality." WOW the Tremor-X124 sounds like its gonna Blast out of the enclosure. Seriously fixed my Voltage issue although now I have loose paneling in my car because its beatin it down.
46 of 56 found this helpful
February 10, 2010
I have this in my jeep powering two amps a pioneer n2 warn 8,000lbs which 2 sets of kc lights and HIDs and this battery keeps voltage at a constant 14-15v. And this is on a stock alt. the kinetik is 300 where this is 100 at my local shop and is the same as the 300 but for 100.
46 of 56 found this helpful
December 4, 2010
Great little battery! Same dimensions and specifications as the Kinetik HC600 but it weighs significantly more. Also the terminals suck compared to the HC600.
Other than that, it does exactly what it's supposed to. Why pay more for something that does the same job?
43 of 51 found this helpful
August 28, 2010
i just bought this today to give my system a little extra power and i cant wait to get it hooked up next weekend and see what kind of power it can put out. Ive heard this and the kinetic 600 are basically the same so i guess ill see...cant wait
46 of 57 found this helpful
July 16, 2010
Ok, let's start off with Sonic getting this to my door step in under 24, that's crazy fast...THANKS. This has been one of the best upgrades to my system. I had a light dimming issue with my 03 Beetle, it has been eliminated after grounding the big three and installing the Shuriken battery. I can easily tell a noticeable difference in how low and tight my low end has gotten and even hear the mids and highs much clearer. FYI I'm running a 5 channel planet audio amplifier.
43 of 53 found this helpful
December 8, 2010
I bought this battery to run my 100w RMS amp and it definitely did not do what I thought it would. It only had enough power for my sub to hit the high bass notes. I'd only recommend it if you were running a small amp for your door speakers or something.
42 of 52 found this helpful
July 24, 2012
Purchased this battery to power a stand alone head unit, 2x dj speakers, and a 2000 watt amp. Also used a 1.2 farad cap. This battery lasted my entire show duration, 12 consecutive hours, and still had consistent flow. Used it on and off for a few months to show the audio system. Ended up using it to power a friends jetski, and that is where it is atm. Albeit, prob not the best place for a self contained battery, but its taking the abuse well lol.
Power levels are unmatched. I'm super happy I got this, and would/will get another.
41 of 51 found this helpful
December 20, 2013
I put this in as a second battery in my 05 mustang gt I'm currently running two pioneer 1500 watt mono amps (850rms) to two alpine type r12 subwoofers at 1 ohm each 1 sub for each amp, and this battery never misses a single beat I was hesitant because it says it's rated to 600 watt systems, however I assure you it's capable of much more than that also a great size so it's easy to hide and or conceal behind an amp rack. To sum it all up another great product from sonicelectronix
39 of 49 found this helpful
November 6, 2011
This power cell rocks! I can run my system all day without an issue. It doesn't even drop voltage when I have it cranked plus headlights plus off road lights! Awesome value with amazing quality!
39 of 49 found this helpful
December 15, 2011
I had a cap-cell from SE that I had to replace with this since it burned out after a week of use. First off, I have enough packaging peanuts to last a lifetime now since the battery was buried in a box about 100 times it's size. Definitely better than finding a lead & acid surprise. The machine screws sent with the battery weren't long enough to accommodate my Monster ring terminals, but 50¢ at the hardware store fixed that. As with the cap-cell, I have no headlight dimming. Finally, the thing that really matters, SPL. Since the only difference in my system is the loss of the "600 W Cap-Cell", exchanging it for this "20 AH Power Cell". To be honest, despite the cap-cell having to work when the subs were brand new and not broken in, my system had more pop with the cap-cell. Maybe adding a capacitor will help.
38 of 48 found this helpful
April 23, 2012
Just wired this in along with a yellow top optima and new tsunami wires. It helps the voltage a little but once its drained its drained (with 1500w rms it drains fast). It does help greatly with my voltage while I am driving though and thats all that matters. For the price it's a steal.
37 of 47 found this helpful
Johns Creek, Georiga
June 12, 2015
This review is being written june of 2015. I waited 2 year to review this battery. I bought this battery June of 2013 and I live in Philadelphia, Pa. It is used in my Yamaha Waverunner VX110 Deluxe. It has been a reliable battery that it is only used in the summer months on the waverunner. I always have maintained the battery when not in use. When the charge drops to 85% it gets charged with a battery charger that has a setting for AGM batteries during the fall, winter and spring. I always put the charger in slow charging mode(2 amps) and sometimes i put it fast charge of 10 amp.
Over time the battery does not hold the full charge as long as it did when the battery was new. When new the battery held the full charge for month and progressively it would loose the charge after a few months. when i checked the charge percent it would be about 90% after about 3 months and sometimes 85%. Now this summer of 2015 after a full charge the battery at 80% charge after 2 weeks. I will have to check the battery every week from now on the make sure it is maintained with the proper charge so that i can increase longevity.
AS of summer 2015 my Yamaha waverunner starts strong with now signs of a weak battery. I will say that the battery screw type post for the connection of the cables should be bigger since the they are so small. Although I never had a problem I suggest 50% bigger so to have better contact and energy flow. I will keep updating this review every summer so I can provide good idea of the quality of the Shuriken SK-BT20.
29 of 35 found this helpful
San Diego, CA
August 30, 2015
This is by far the best battery I have ever owned, best bang for your buck and it has the optional extended warranty. You can't lose with this one, I'll be buying another one once I add to my sonic sound system.
18 of 22 found this helpful
September 13, 2017
I currently have a 500rms amp from rockford fosgate powering a 10inch nvx subwoofer thats rated at 750rms. This battery definitely helped out my setup. More bass hits and no more dimming from headlights while driving at night. Helped my power supply
0 of 0 found this helpful
Round lake baech Illinois
March 25, 2016
This little battery powers my Kenwood marine stereo and a Soundstream slim amp with 8 in Sub all day long on my bike. I wired it that way because I didn't want to steal power from my starting battery. The charging system sucks on the bike and this was my solution. Worked out better than I expected. I still recharge it with a battery tender after a day of riding. I haven't had it that long so I can't comment on durability or longevity.
0 of 0 found this helpful
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Internal Product ID
Wiring Diagram Legend
Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.